Jump to content


jmoe2012

Regular Member
  • Posts

    6
  • Joined

  • Last visited

1 Follower

Contact Methods

  • First Name
    James

Profile Information

  • Lexus Model
    RX400h
  • Lexus Year
    2008
  • Location
    California (CA)

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

jmoe2012's Achievements

Progressing

Progressing (3/14)

  • One Year In
  • First Post
  • Week One Done
  • One Month Later
  • Conversation Starter

Recent Badges

0

Reputation

  1. I think any good working master cylinder replacement part should have fixed the pedal falling upon braking issue. You would not have the same problem for months even if the fluid is not flushed correctly with a new master cylinder. It takes a few months for the master cylinder to fail again and would not happen again in just a week or two. I never trusted any rebuild stuff from the auto parts store. It's too much of a coin toss and only added more cost and misery in my experience. You probably can order a new master cylinder from online Toyota or Lexus dealer and have it installed by your mechanic. I was looking to buy a used 06 RX330 many years ago and I found that car has the same problem upon test driving. I asked the owner lady politely if I can consider it overnight. Upon googling, I found it's a very expensive fix so I told the owner I can't buy it with the issues at hand. Here is the recall from Toyota / Lexus for that issue. The proper fix would cost upward of $1000 but it should be all it's needed. A complete Toyota DOT3 Fluid flushed and a new master cylinder is all that is needed unless you have a leaking fluid line somewhere which would be obvious under the car. I don't have RX330 but I think ABS pump would turn on very frequently when the car is parked and stepping on brakes with the engine running or even without stepping on the brake pedal in some cars. I think it's quite easy for a mechanic to tell if a ABS pump is falling. Techstream scanner can go even further to test the pump and all the other ABS functions on this. But I am 99% sure ABS and Check Engine Light would be triggered for the ABS issues. https://www.carcomplaints.com/Lexus/RX_330/2006/recalls/brake-master-cylinder-10v499000.shtml
  2. I wouldn't want to pay Lexus $175 to tell me that needs a master cylinder replacement again but this can be done at Toyota too. I don't know if you used the Original Lexus Toyota DOT3 fluid after the previous replacement. The failing of the original master cylinder seems like it has to do with the low or no polymer content in the aftermarket brake fluid after the brake pads replacement or serviced or flush at the 3rd party services. If you don't completely flushed out the offending brake fluid off your brake lines, chances are that the new replacement cylinder may start to wear out again pretty soon. I think it's Toyota / Lexus fault for not redesigning the master cylinder seal with a better one. Where do you get the replacement master cylinder anyway? If it's not NEW OEM or you bought used one of ebay, chances are 50/50 that they are either failing or bad ones to begin with. I guess any technician could tell if the ABS pump is falling and it should trigger DTC codes since it's quite a danger to be on the road with the failing pump.
  3. Yeah. I saw that one before and I reviewed it thoroughly. I don't have any codes or any symptom of poor brake performance whatsoever. It never made any sound once it is shifted out of P to R or D gear. It's only heard when it's parked and the brake pedal is depressed. I ran the Techstream and no fault and no DTC in ABS or the main ECU or anywhere. It's running well in driving or any other test I can perform. It's just that noise that makes me think if it's a sign of early actuator wear. I have been digging info on this site and found it probably got to do with one of the TSBs posted by lemon in the sticky and required a correct bleeding procedure. I am not sure yet but it required jacking up the car about 22" off the ground and I don't have that high lift jack so I need to buy one before I can try it.
  4. Thanks for chiming in! I confirmed the squeal (or squeak) is indeed coming from the brake actuator assembly with the help of the wife who presses on the brake pedal when the vehicle is running (ready) and the gear is in Parked position. It did make one or two squeal sound from the actuator assembly and then stops. It's like the relays or brake pressure pump is applied for a short time. This noise can be heard with or without the engine running but the car is put on Ready state.
  5. Awesome thread, Lemon! thanks for sharing all the TSBs! Two thumbs up, Sir!
  6. Hello Dear Lexus Owners, I recently bought a 2008 RX400h with about 140K miles and drive off. It drives fine out from the dealer but I noticed a short squeal when the car is started and drive off from Parking. When I depressed the brake pedal to shift the gear from P to R, I heard a noticeable squeal coming from the engine compartment. It's a short squeal like 2-3 second and it stops or may be repeat once or twice with about 10 second interval if I keep pressing down the brake pedal at the Park Position. It never made that sound when the gear is in R or D position or during regular driving. It only squeals once or twice when the car is parked as the pump is pushing brake fluid but it can't because the line is full. Is that the sign of the brake flush needed or air trapped in the hydralic lines or the actuator assembly starting to wear out? I have seen videos of failing actuator on youtube but it's nothing like that at all. It's just a squeal or two at the Park position. Is that normal for old RX400h or it's needing to go to the Lexus dealer? I have a Techstream setup and may be able to flush the brake fluid myself if that's all it needed. I think I'll replace the pads and lube all the brake caliper pins before the flushing. Thanks for your input, folks!
×
×
  • Create New...

Forums


News


Membership