UPDATE: A limited supply of the original best-selling Lextreme 1UZFE EGR Delete Kit remains. If you own a 1UZ from 1990-1997, you really need to get this kit! Email me at [email protected] for help with ordering or questions. This will probably be the last kits I have made.

All other parts are SOLD OUT and won't return, including the LS400 and SC400 turbo kit, rebuild kits, supercharger and performace torque converter. We're not an auto parts supplier and I can't respond to inquries for random Lexus and Toyota auto parts.

LEXTREME LEXUS FORUMS HERE! - Post Questions For Quick Answers!

Lexus LS400, SC400 and GS400 Alternator

Most of our readers are confused about Lexus alternator for the LS400, GS400 and SC400.  So where is the confusion?  Well, I have a friend who own an alternator store and he explained to me the whole thing in details.  So in this article I will try to explain to you the confusion. 

Alternator failure is a very common especially when the power steering pump is right above it and leakage of power steering fluid will short out the alternator.  There are basically two versions of the alternator and the stock oem alternator will generate around 90 to 100 amps.  Not “IF” but “WHEN” your alternator will go out, it is very important you know what which alternator will fit your car.

So here is goes, the early model LS400 and SC400 have the round plug and later models have oval plug.  Here are some pictures of the two alternators giving everything else is the same.

The left alternator has the round plug                                                                                   The right alternator has the oval plug

Here are two pictures of close-up of the two alternators side by side.

So which alternator do u have?  Here is the break down:

Model Year Alternator Plug
LS400 1990-1992 ROUND
1993 to 2000 OVAL
SC400 1992-1994 ROUND
1995-2000 OVAL
GS400 1998-2000 OVAL

I hope the above explanation would help you clarify what you have once you see it.

Do you have any questions? If so, please head over to the forums to get a quick answer or share your experience!

Cash App (user: $lextremeparts).
This is a freelance site with no support by huge companies.  I have been doing most of the R&D and technical write-ups by myself with my personal money and literally thousands of hours of my time.  I have taken extra steps to demonstrate in details how things are done.  Currently I am one of the few people doing Lexus V8 research and performance enhancement.  This effort comes from my personal love for this wonderful engine.  Most of the modifications are from trial and error. There's no cookbook for 1UZFE mods and its unknown territory for much of supercharger performance.  The parts, labor, web development and site hosting are 100% paid from my personal hobby money.  If you feel my efforts help you in any form, please do not hesitate to donate any amount of money to support this site. You have no idea how much I and the entire Lexus and Toyota community appreciate it!

Leave a Comment