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Best Selling Genuine Infiniti Alternators

  • We Stock the following top leading brands, including Bosch, Denso, Hitachi
  • Constantly Updated Inventory of Infiniti Replacement Alternator Parts

We stock Alternator parts for most Infiniti models, including EX35, EX37, FX35, FX37, FX45, FX50, G20, G25, G35, G37, I30, I35, J30, JX35, M30, M35, M37, M45, M56, Q40, Q45, Q50, Q60, Q70, Q70L, QX4, QX50, QX56, QX60, QX70, QX80.

Bosch
1999 Infiniti I30 Alternator 6 Cyl 3.0L Bosch - Alternator (Remanufactured)

P311-0E43063    AL2389X  Remanufactured

231005Y700 , 231002Y900 , 2310M0L706 , 2310031U01

Qty:
$60.00 $109.05
Bosch Alternator
  • Bosch Premium 100% Remanufactured Alternator
  • Standard version 110 A
  • Alternator (Remanufactured)
  • Product Attributes:
    • Amperage Rating: 110
    • Case Color: Aluminum
    • Case Material: Aluminum
    • Fan Type: Internal
    • New Or Remanufacured: Remanufactured
    • Original Equipment Manufacturer Names: Hi
    • Packaging: Box
    • Plug Type: 306
    • Pulley Outside Diameter: 62
    • Pulley Type: 6s
    • Pulley Type / Belt Type (Alternator): 6s
    • Regulator Type: Internal
    • Rotation Direction: Clockwise
  • Bosch Premium Alternators are designed, built and tested to provide the ultimate in performance and reliability
Brand: Bosch
Additional Fitment Information:
Vehicle Block Engine CID CC
1999 - Infiniti I30 V 6 Cyl 3.0L 182 2988
Bosch
2002 Infiniti I35 Alternator 6 Cyl 3.5L Bosch - Alternator (Remanufactured)

P311-0E43063    AL2389X  Remanufactured

231005Y700 , 231002Y900 , 2310M0L706 , 2310031U01

Qty:
$60.00 $109.05
Bosch Alternator
  • Bosch Premium 100% Remanufactured Alternator
  • Alternator (Remanufactured)
  • Product Attributes:
    • Amperage Rating: 110
    • Case Color: Aluminum
    • Case Material: Aluminum
    • Fan Type: Internal
    • New Or Remanufacured: Remanufactured
    • Original Equipment Manufacturer Names: Hi
    • Packaging: Box
    • Plug Type: 306
    • Pulley Outside Diameter: 62
    • Pulley Type: 6s
    • Pulley Type / Belt Type (Alternator): 6s
    • Regulator Type: Internal
    • Rotation Direction: Clockwise
  • Bosch Premium Alternators are designed, built and tested to provide the ultimate in performance and reliability
Brand: Bosch
Additional Fitment Information:
Vehicle Block Engine CID CC
2002 - Infiniti I35 V 6 Cyl 3.5L - 3498
Bosch
2003 Infiniti I35 Alternator 6 Cyl 3.5L Bosch - Alternator (Remanufactured)

P311-0E43063    AL2389X  Remanufactured

231005Y700 , 231002Y900 , 2310M0L706 , 2310031U01

Qty:
$60.00 $109.05
Bosch Alternator
  • Bosch Premium 100% Remanufactured Alternator
  • To 12/2002
  • Alternator (Remanufactured)
  • Product Attributes:
    • Amperage Rating: 110
    • Case Color: Aluminum
    • Case Material: Aluminum
    • Fan Type: Internal
    • New Or Remanufacured: Remanufactured
    • Original Equipment Manufacturer Names: Hi
    • Packaging: Box
    • Plug Type: 306
    • Pulley Outside Diameter: 62
    • Pulley Type: 6s
    • Pulley Type / Belt Type (Alternator): 6s
    • Regulator Type: Internal
    • Rotation Direction: Clockwise
  • Bosch Premium Alternators are designed, built and tested to provide the ultimate in performance and reliability
Brand: Bosch
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Infiniti I35 V 6 Cyl 3.5L - 3498
Denso
1997 Infiniti I30 Alternator 6 Cyl 3.0L Denso - Reman Alternator

P311-406150F    210-3106  Remanufactured

LR1125-702 , 213-8982 , 90-25-1078 , 3211721 , AL2365X , 1N-8982 , N13612 , 13-8982 , 13612 , 15844 , LR1125-702F , LR1125-702H , 1860745 , 23100-31U02 , 23100-40U00 , LR1125-702B , 13284 , A2921 , DAA318

Qty:
$68.00 $336.11
Denso Alternator
  • Remanufactured DENSO First Time Fit Alternator
  • 125 Amp OE Equivalent
  • Reman Alternator
  • Product Attributes:
    • Amperage Rating: 125
    • Family: Hitachi Oe
    • Fan Type: Internal
    • Plug Type: 306
    • Rotation Direction: Clockwise
    • Voltage: 12.0
  • DENSO alternators are not only original equipment on many of the world's top production cars; they are a favorite in motorsports as well, where their light weight, high efficiency, and durability under the most demanding conditions make them the natural choice. Remanufactured DENSO alternators go through a grueling process. Stators and rectifiers are tested to 300 volts, while rotors are submitted to 600 volts, all to ensure reliable performance. Rotor slip rings are buffed to an 8 micron surface finish, with runout limited to 20 microns, minimizing brush wear and abrasion. Bearings are validated to OE standards and loaded with premium OE standard lubricants. New or remanufactured, a DENSO alternator is a quality component. Offered in versions from 40 to 160 amperes and beyond for hundreds of specific vehicle applications, all alternators meet DENSO's rigorous First Time Fit standards. Contemporary cars employ dozens of sophisticated electronic systems from bumper to bumper, placing heavy demands on the charging system. The alternator is no place to cut corners. DENSO First Time Fit alternators meet or exceed all manufacturer standards, mount properly with a minimum of installation issues, and provide years of reliable service. Features. Premium cores and precise OE assembly benchmarks; Design to meet the grueling heat and electrical requirements; First Time Fit provides perfect mounting with no belt/pulley alignment issues; Benefits. Service professionals preferred DENSO's alternators for a trouble free solution; OE quality fit, appearance, and durability; Full compatibility with sensitive electronics systems; Compact and lightweight design
Brand: Denso
Additional Fitment Information:
Vehicle Engine Designation Engine VIN Block Engine CID CC
1997 - Infiniti I30 VQ30DE C V 6 Cyl 3.0L 182 2988
Denso
2001 Infiniti I30 Alternator 6 Cyl 3.0L Denso - Reman Alternator

P311-3B4F2F9    210-3105  Remanufactured

13-8986 , 13402 , 1N-8986 , 213-8986 , LR1110-709B , LR1110-709 , 1860773 , A2760 , 23100-0L701 , 334-2041 , DAA314 , AL2389X , 437683 , 13826 , 15938 , A2075 , 90-25-1075 , 3342041 , 3211721 , DAA314A , LR1110-709C , 13639 , N13826 , LR1110-709BR , 12245 , A13826

Qty:
$68.00 $382.10
Denso Alternator
  • Remanufactured DENSO First Time Fit Alternator
  • 110 Amp OE Equivalent
  • Reman Alternator
  • Product Attributes:
    • Amperage Rating: 110
    • Family: Hitachi Oe
    • Fan Type: Internal
    • Plug Type: 306
    • Rotation Direction: Clockwise
    • Voltage: 12.0
  • DENSO alternators are not only original equipment on many of the world's top production cars; they are a favorite in motorsports as well, where their light weight, high efficiency, and durability under the most demanding conditions make them the natural choice. Remanufactured DENSO alternators go through a grueling process. Stators and rectifiers are tested to 300 volts, while rotors are submitted to 600 volts, all to ensure reliable performance. Rotor slip rings are buffed to an 8 micron surface finish, with runout limited to 20 microns, minimizing brush wear and abrasion. Bearings are validated to OE standards and loaded with premium OE standard lubricants. New or remanufactured, a DENSO alternator is a quality component. Offered in versions from 40 to 160 amperes and beyond for hundreds of specific vehicle applications, all alternators meet DENSO's rigorous First Time Fit standards. Contemporary cars employ dozens of sophisticated electronic systems from bumper to bumper, placing heavy demands on the charging system. The alternator is no place to cut corners. DENSO First Time Fit alternators meet or exceed all manufacturer standards, mount properly with a minimum of installation issues, and provide years of reliable service. Features. Premium cores and precise OE assembly benchmarks; Design to meet the grueling heat and electrical requirements; First Time Fit provides perfect mounting with no belt/pulley alignment issues; Benefits. Service professionals preferred DENSO's alternators for a trouble free solution; OE quality fit, appearance, and durability; Full compatibility with sensitive electronics systems; Compact and lightweight design
Brand: Denso
Additional Fitment Information:
Vehicle Engine Designation Block Engine CID CC
2001 - Infiniti I30 VQ30DE V 6 Cyl 3.0L 182 2988
Hitachi
2003 Infiniti I35 Alternator Hitachi - 110 Amp

P311-53FC3D1    W0133-2186929  New

Qty:
$422.60
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 01/2003-
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
2003 - Infiniti I35 Fr:01-00-03
Hitachi
2004 Infiniti I35 Alternator Hitachi - 110 Amp

P311-53FC3D1    W0133-2186929  New

Qty:
$422.60
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle
2004 - Infiniti I35
Hitachi
1998 Infiniti I30 Alternator Hitachi - 110 Amp

P311-01B4B7C    W0133-2186619  New

Qty:
$505.71
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 06/01/1997-
  • The OE alternator is equipped with a 2-pin connector. Some replacement alternators may use a 3-pin connector, but the third pin is for plug location purposes only and has no effect on the performance of the replacement alternator. Reuse of the pulley from the old alternator may be required.
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1998 - Infiniti I30 Fr:06-01-97
Hitachi
1998 Infiniti I30 Alternator Hitachi - 110 Amp

P311-01B4B7C    W0133-2186619  New

Qty:
$505.71
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 06/01/1997-
  • The OE alternator is equipped with a 2-pin connector. Some replacement alternators may use a 3-pin connector, but the third pin is for plug location purposes only and has no effect on the performance of the replacement alternator. Reuse of the pulley from the old alternator may be required.
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1998 - Infiniti I30 Fr:06-01-97
Hitachi
1999 Infiniti I30 Alternator Hitachi - 110 Amp

P311-01B4B7C    W0133-2186619  New

Qty:
$505.71
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: -06/30/1999
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1999 - Infiniti I30 To:06-30-99
Hitachi
1999 Infiniti I30 Alternator Hitachi - 110 Amp

P311-01B4B7C    W0133-2186619  New

Qty:
$505.71
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: -06/30/1999
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1999 - Infiniti I30 To:06-30-99
Hitachi
2000 Infiniti I30 Alternator Hitachi - 110 Amp

P311-2C2471C    W0133-2218545  New

Qty:
$313.32
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 07/01/1999-
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
2000 - Infiniti I30 Fr:07-01-99
Hitachi
2000 Infiniti I30 Alternator Hitachi - 110 Amp

P311-2C2471C    W0133-2218545  New

Qty:
$313.32
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 07/01/1999-
  • 110 Amp
  • Remanufactured
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
2000 - Infiniti I30 Fr:07-01-99
Hitachi
2001 Infiniti I30 Alternator Hitachi - 110 Amp

P311-2C2471C    W0133-2218545  New

Qty:
$313.32
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle
2001 - Infiniti I30
Hitachi
2001 Infiniti I30 Alternator Hitachi - 110 Amp

P311-2C2471C    W0133-2218545  New

Qty:
$313.32
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle
2001 - Infiniti I30
Hitachi
2002 Infiniti I35 Alternator Hitachi - 110 Amp

P311-192DC89    W0133-2218546  New

Qty:
$317.53
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle
2002 - Infiniti I35
Hitachi
2003 Infiniti I35 Alternator Hitachi - 110 Amp

P311-192DC89    W0133-2218546  New

Qty:
$317.53
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: -12/31/2002
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
2003 - Infiniti I35 To:12-31-02
Hitachi
1997 Infiniti Q45 Alternator Hitachi - 110 Amp

P311-01CD114    W0133-2307302  New

Qty:
$315.89
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 07/1996-, Remanufactured
  • 110 Amp
  • Remanufactured
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1997 - Infiniti Q45 Fr:07-00-96
Hitachi
1997 Infiniti Q45 Alternator Hitachi - 110 Amp

P311-01CD114    W0133-2307302  New

Qty:
$315.89
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Production: 07/1996-, Remanufactured
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle Prod. Date Range
1997 - Infiniti Q45 Fr:07-00-96
Hitachi
2000 Infiniti Q45 Alternator Hitachi - 110 Amp

P311-01CD114    W0133-2307302  New

Qty:
$315.89
Hitachi Alternator
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • OE Replacement - Reman
  • Remanufactured
  • 110 Amp
Brand: Hitachi
Additional Fitment Information:
Vehicle
2000 - Infiniti Q45

Latest Infiniti Repair and Alternator Installation Advice

CarJunky AutoAdvice

1999 Infiniti G20 Alternator Issues

Showing 3 out of 3 Posts
Question From nicbrown101 on 1999 Infiniti G20 Alternator Issues

1999 Infiniti G20, 4 cyl, 185,000 miles... I bought this car from a private party and I am now thinking I know whay he got rid of it. I have had the car for about 10 months. Since September I have put 3 remanufactured alternators in it and it just died on me AGAIN yesterday. It is the alternator AGAIN. Could this really be due to bad remanufactured alternators? Is it worth it to me to spend 400 to 500 on and actual Infiniti alternator when this car has so many miles on it? Please help!!

Response From Sidom Top Rated Answer

On this one, all the body and engine grounds need to be checked to make sure then aren't missing/loose/corroded.

Power will finds its way home.....one way or another if there is a path. If a ground is missing the path could be through a part or system that was intended to be a ground source.

Missing grounds can take out almost any part, from motor mounts to bearings. You would be surprised at the problems they can cause.....

Response From nicbrown101

Thanks Sidom! I have a dear friend who is a mechanic and I will ask him to do that for me. I am just so fed up with being on the side of the road with a dead car. However I definitely love not having a car payment! Thanks Again!

Alternator Belt

Showing 4 out of 4 Posts
Question From Spinning2005 on Alternator Belt

Can car be driven if alternator belt is broken? The car is a 2011 Infiniti G37x Sedan.

Response From Mr.scotty

I wouldn't take the risk man.

Response From Discretesignals Top Rated Answer

How long can you swim with a cinder block tied to your leg? Eventually, your going to go down..

Response From re-tired

Gotta ask ........why would you want to ? Most everyone these days have AAA or similar.OK ,that said.If the belt does not also drive the water pump You could drive a short distance , I would say 10 mlis or less . Provided you have a fully charged batt,turn off all electrical loads ..ie....lights, a/c,radio, wipers ,cell phone charger etc.If voltage gets to approx 9v the computer(s)tend to shut down.. So i would say,yes, But use caution , use a tow service if possible.

altinator problem

Showing 2 out of 5 Posts | Show 3 Hidden Posts
Question From rlharris on altinator problem

On a 99 Chevy van, with one wire altinater, it keeps dying when the altinater is wired up, but unhook it and it will run all day? why?

Response From Tom Greenleaf Top Rated Answer

You just tweaked my interest as I've had GM "Delphi for example" alts short out - some without being caught in the act leaving battery dead so I just checked the OHMs with an analog ohm meter between body and the main HOT terminal and it registers just a VERY light, low ohm draw - far left of the "infinity" side.

Bet yours would show infinity suggesting it's shorted. OK: It takes some juice to make an alterntor generate current such that a dead battery can't enable an alternator vs way old generators.

You said a ONE wire alternator. You mean by that ONE main wire and a plug which should also be on it for both gauge/light and some if disconnected will disable the alt but not short it.

How can you run all day on no charge? An hour perhaps with a fully charged battery but all day is unheard of to me??

T

Response From rlharris

Well, yeah, all day is a bit much... Sorry, just about ready to junk the van. Any ideas where I could start looking for where the short? I am out of ideas at this point.

Response From Tom Greenleaf

If you touch the main wire to alt and get a substantial spark OR it's not insulated well there the alt is acting as a short and shouldn't.

Diodes inside can do that - usually they just fail and it doesn't charge at all or just slightly but they must be able to short out hard. Just so happens one OE one on a GM of my own did that without provocation and was such a dead short it killed the entire new battery and almost melted off that wire in a couple minutes.

Another was a car that would just be found dead like a light was left on and did that a few times but then charged and went another few weeks and do it again?? Never found anything left on?? Swapped out alternator and it hasn't done it in a year now so by default it must have been able to do just that - but it still charged when running and would test out fine??

I say toss the alt if you are going to fix this at all. You can just get diodes but last time I checked they were too close to the cost of a whole alternator so I didn't go that route.

Side note: When I have one of these with strange problems I take the quesionable parts out if the core is to be returned - those with intermittent problems as they could be reused and cause the same problem when resold as a rebuilt - trust me - they don't use all new parts in a rebuilt. When price is close enough I'm selecting new more often.

Note II: You can fix alternators. Index the body of it and the obvious screws/bolts it will come apart. Bearings, brushes, diode trios can be serviced and then you need to know how to retain the brushes to put it back together - just paper clips really. Will do bearings if just those and they are too common too. If you took it apart you might see something obviously wrong - who knows?

Good luck,

T

Response From rlharris

Thank you... you may have saved the van.

Recommend an OBD-II scanner

Showing 2 out of 3 Posts | Show 1 Hidden Posts
Question From wacki on Recommend an OBD-II scanner

I just saw an article on OBD meters and now I want one. Any recommendations for an amateur car fixer upper?

Background:
------------------------
I have a 2000 Honda Accord and will probably drive it for 5 more years before buying a new car. The gf has a 2001 Infinity. I change my brakes, alternator, struts, transmission fluid and oil. I can only see myself getting more involved with my car over time.

Thanks!

Link removed.............not allowed

Response From Sidom

Sorry, been a crazy week.....Glad it's over... Man what a rollercoaster...........

Ok scanner/readers........

I'll offer what little input I can give....... I don't really use the ones you are looking at... I do have an OTC/SPX hand held for the sole purpose of clearing codes an to date haven't had a system I couldn't read..... Another brand I have seen a few of the guys use and have good luck with is Actron (sp)

I'm guessing price works into equation somewhere and like anything, you get what you pay for......What you should look for is lines of PIDs & Freeze frame data.. All will read & clear so that's a non issue. A PID is parameter ID.....basically, a line of data.... the more live data you can get the better.... I was surprised to see one younger guy get one that did OBD I as well....That means he can read old pre 95-96 cars, if you won't be doing older stuff then there is no need for that option....

Freeze frame data is PIDs the comp stores during the failure so the tech can try to duplicate the failure.....Was the car doing 90mph or 15mph? Was it cold or hot? light load or heavy? etc......This can be useful but some people have the mistaken idea it shows the PID that failed.... It doesn't.......sometimes it does by luck but what the comp is doing is showing major inputs of what was happening during the failure.....

The other thing would be bi-directional controls......what that means in a nutshell is with the scanner, you can control a function......turn something on or off with the scanner.......... I honestly don't price shop these type of units but would be very surprised to see one with bi-directional controls.....but hey I've already been surprised once........

Also if they have the ability to communicate with other modules other than the PCM....ABS, Trans, airbag, BCM, etc... Once again I'd be surprised,,,,,but ya never know....

In the end I would stick with a brand I know.......There is a lot of cheap Chinese crap out there and the price reflects it.... Even in the high end stuff...... A Ford IDS VCM (factory scan too) is about 5 to 6k..... There's cheap Chinese clones out there for around 2k..... I've heard horror stories about them and yes there's a few guys that have had good luck with them........It's a crapshot & 2k is too much for me to gamble.......

Compare prices....If it's not too much you decide.......The one thing you will get with a cheap chinese clone is way more options & abilities than it's quality counter part but....there's a reason for that...........

Response From wacki Top Rated Answer

Nobody has an OBD to recommend?

Old, old Infiniti: Standby battery/power issue

Showing 2 out of 2 Posts
Question From Those Who Squirm on Old, old Infiniti: Standby battery/power issue

I have a 1991 G20, and some time ago we had the alternator replaced. We don't drive the car that often or we would have noticed the ensuing problem in time to take it back to the repair shop. But ever since the repair job, there is no standby power (i.e., when parked) at all. Therefore, the radio always "forgets" any presets I might have saved, as well as the station last listened to. Instead, when the radio is turned on, it is always set to the AM band and tuned to the lowest frequency on the band (in my neck of the woods, that's airport terminal and traffic info). The front seats also have automated shoulder restraints that are supposed to open up when the door is opened and re-retract when the door is closed. But for this to happen now, the ignition key has to be turned all the way to the second position; in other words it works the same as the power for the windows.

Where would I begin to troubleshoot this? Ordinarily, I assume there's a standby power system that's supposed to stay on when the car is parked, subsisting on a trickle of juice from the main battery, and this system has now failed. This sounds like it ought to be a self-serviceable problem, provided I know what to look for. Fuses? Some loose wire or something, under the hood, somewhere? Or should I forget about it and take to a shop?

Response From Hammer Time Top Rated Answer

No, there is not such thing as a "standby system" power. The radio should have 2 power feeds, one keyed with the ignition to operate it and another one with constant power that is "keep alive" memory power. The seat belt system would have to be diagnosed separately.

All this is assuming that you didn't just have a dead battery when you got to the car.