frenchbus Posted January 30, 2007 Share Posted January 30, 2007 I have a 1998 GS 300 with 155,000kms. Last week the brake peddle movement increased considerably when brakes are applied. There are no faults lights on the dash. After bleeding the brakes there is no change and Lexus advises that the Power Boost in the Master Cylinder is faulty and suggests replacing the entire unit.....................very expensive. Would anyone verify this advice and advise me if a Master Cylinder at 1/5 the price from a wrecker would be a good idea? :cries: Quote Link to comment Share on other sites More sharing options...
92Lex Posted January 31, 2007 Share Posted January 31, 2007 It wouldn't pose a problem as a temporary replacement. Hard to tell how long a used one would last though. Quote Link to comment Share on other sites More sharing options...
stroked4.6 Posted January 31, 2007 Share Posted January 31, 2007 I have a 1998 GS 300 with 155,000kms. Last week the brake peddle movement increased considerably when brakes are applied. There are no faults lights on the dash. After bleeding the brakes there is no change and Lexus advises that the Power Boost in the Master Cylinder is faulty and suggests replacing the entire unit.....................very expensive. Would anyone verify this advice and advise me if a Master Cylinder at 1/5 the price from a wrecker would be a good idea? Do you have any leaks? Is this power booster run off of the power steering like with many other cars? I would test the booster first. With the car off push your foot down on the pedal. Then start the car. The pedal should pop up rapidly if the booster is good. The pedal will pop up firmly. This tells you the booster is doing it job in providing pressure for the brakes. Its possible one of the seals in the master is shot. This would cause a mushy pedal but no leaks would be found. Just another scenerio. Quote Link to comment Share on other sites More sharing options...
djspawn00 Posted February 1, 2007 Share Posted February 1, 2007 1/5th ( about $400 or something) of the price is still a lot for something most junk yards aren't even sure will last a week or year unless you can get info on the donor car. i see some on ebay... heres one.. http://cgi.ebay.com/ebaymotors/LEXUS-MASTE...sspagenameZWDVW Quote Link to comment Share on other sites More sharing options...
Jwagonmd Posted February 1, 2007 Share Posted February 1, 2007 Go on ebay, thats your best bet....or find a junkyard Quote Link to comment Share on other sites More sharing options...
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