100 vs 130 amp Alternator
#16
You can also contact CARid.com, give them your VIN, and they will tell you which one you need. You can usually trust them however, you can always price shop for alternators, etc. If you want the Lexus part number you can go to lexuspartsnow.com and put in your year make and model, and have the VIN handy, and you can the Lexus part number and discount price. The LPN is handy to have if you are trying to buy aftermarket.
When I had to have my p/s serviced the local Toyota dealer using Toyota parts was cheaper than either Lexus or a local using aftermarket parts. I got a 12 month 12k mile warranty on the Toyota parts installed by the Toyota dealer. The Lexus service was an order of magnitude more expensive. YMMV.
When I had to have my p/s serviced the local Toyota dealer using Toyota parts was cheaper than either Lexus or a local using aftermarket parts. I got a 12 month 12k mile warranty on the Toyota parts installed by the Toyota dealer. The Lexus service was an order of magnitude more expensive. YMMV.
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JTho (06-16-19)
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I recently had my car towed into the dealer because my battery light was on, and battery discharging, (suspected alternator). When the service writer called me and confirmed that, he also said that they didn’t have the alternator in stock, so I asked him if he could order a higher amperage one, as I was planning on installing a stereo that might stress a standard one. He told me that a higher amp one would or might damage the vehicle, and that the proper solution would be a second battery and cap setup. Is he right? I don’t know.
#18
Lexus Test Driver
I recently had my car towed into the dealer because my battery light was on, and battery discharging, (suspected alternator). When the service writer called me and confirmed that, he also said that they didn’t have the alternator in stock, so I asked him if he could order a higher amperage one, as I was planning on installing a stereo that might stress a standard one. He told me that a higher amp one would or might damage the vehicle, and that the proper solution would be a second battery and cap setup. Is he right? I don’t know.
Last edited by Bgw70; 07-05-19 at 06:19 PM.
#20
Alternators have built in regulators. You will not fry anything by putting a larger amperage alternator in. That's like saying putting a larger amperage rated battery will fry your car.
#21
Racer
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I would be suspicious of the individual that gave you this advice.
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Coleroad (07-06-19)
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Everything I’ve read agrees with you, I just relayed what he said. As far as my system goes, the 600 watt amp recommends a 75 amp alternator, don’t know about the smaller one. The reason for the cap is obvious, while the second battery would be helpful in avoiding inadvertent rundowns.
#24
Actually they are quite different. The 100 amp has a 2 point mount and the 130 has a 3 point mount. The brackets are different on purpose.You should be able to tell the difference by looking at the car or your friendly auto parts guy can.
If you have air conditioning, stereo, CD changer, heated seats the 130 is the one to go with. And, it probably the amperage that came with the car. If you are going to put in more powerful audio the 130 is required.
If you have air conditioning, stereo, CD changer, heated seats the 130 is the one to go with. And, it probably the amperage that came with the car. If you are going to put in more powerful audio the 130 is required.
okay so just came from parts store and 130 has that extra mount tab. Can I get it to fit if old one was 100amp with no third tab? If so do I need a extra bracket or something? This is so helpful. Thanks everyone!!!
UPDATE - so the 130amp fits fine. Clearly has extra third stud that was not being used so I guess I will go with that since this has Nav and heated seats and ML sound. Plus Mfr date is 7/2002. Will 30 more amps hurt my system if not correct? See my 1 min video… https://youtu.be/ca1Bw1XghCk
Last edited by AceWright; 04-23-22 at 10:39 AM.
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