Question about 1990 Lexus LS 400

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I have a 1990 Lexus LS 400 and the brakes have failed. I replaced the master cylinder, the brake lines and now being told the ABS "brains" of the braking system needs replacement. Has anyone had this problem and if so where can I can a rebuilt part that will solve my problem.

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  • eellbb Jan 11, 2009

    I originally took the car to Mieneke. They said it was a mastecylinder, which they replaced. After the brakes failed again they replaced on of the brake lines and that did not work. Now Lexus is telling me I need a ABS "brain" for the braking system and that part cost $2200.

    I don't know if anyone knows what is wrong.

  • John Jon May 11, 2010

    Hello are you finished gue$$ing now $$$??. if the brakes failed it being 1990 i would look closely at the abs pump! test it before replacement again and you obviously do not know what your doing I recommend stop gue$$ing before you or someone else gets hurt from your gue$$ game you have going if these work for a day and fail because of your obevious lack of knowledge and experience you might find your self needing some traffic legal advice will you gue$$ your way through that to?hey don't take this the wrong way! if it was a starter problem or fuel problem fine but brakes are nothing to play with i have seen this before!!!!



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If the pedal is spongy you may still have air in the lines. If there are no brakes at all you may need to adjust the push rod for the master cyl. If the ABS has a fault it will set a code and the rest of the brake sys. will work normally

Posted on Jun 16, 2009


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Brake booster is leaking, how envolved is it to replace.

Trivial. If it is vacuum that is leaking I assume. (If it is fluid, then it is actually the master cylinder and not the booster that is leaking.)
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Sometimes hard to reach them under the dash.
When you replace the booster, try to ensure the brake pedal rod slips into the right place in the booster.
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you need to bleed them.

Jan 11, 2009 | 1990 Lexus LS 400

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