1992 Lexus LS 400 MY Battery

When you say it won't start, does it crank or does it crank slow? If it's a cranking problem, please see below.

For my 91 LS400, I condemned a few batteries before I realized the startor motor itself was bad. Mine lasted almost 200,000 miles. This isn't an easy job. The starter is located in the intake manifold and is a very expensive repair. If you have checked and confirmed all power and grounds are clean and tight, and the battery and alternator are ok, then you probably have a tired starter motor. I, personally, would recommend a new Lexus starter whether you or someone else installes it.

Good luck

- Kevin