Hey I’m new to the forums I just bought a 2006 Lexus is350 with 50000 miles. And sometimes when I brake my steering wheel turns about 90 degrees to the right. In the past two weeks I have completely Yee done my front and rear brakes pads rotors and calipers and all the hardware I also bought brand new tires And have had 2 alignments done. And this dam problems still persists. Anyone have any clue what could be causing it my mechanic said the suspension looks solid.only thing I can think of is a faulty power steering internals. Mind u it only happens when I’m coming to a stop. Any suggestions would help!

 

You said you checked the calipers. Usually if it's pulling one way when you're braking, it's typically a sign of a sticking caliper. I'd double check them. It's pretty easy to tell if one is sticking since you'll feel an unusual amount of heat coming out from the wheels.

Considering it's a 2006, have you done a brake fluid flush too?

 

yes like I said I just got brand new brakes everything is new. I have done brake fluid 3 times lmao

 

Other than sticking calipers like previously mentioned, another cause can be a collapsed brake hose. The hose may look fine on the exterior, but the inner liner may be restricted. This could cause the caliper to stick as the fluid can't go back into the master cylinder. Since you have all new brakes, calipers, rotors etc I can't think of anything else except this or suspension

 

That floating rear caliper is suspect. As mentioned previously, heat tells a story. From hight speed coast to a stop and check temps at all four corner.

Even tho tech says it's good up front, weak LCAB 's can cause this. Static check they are fine but deflect under breaking.

Grab the RCF parts. You can't go wrong. Also check tires and tire pressure and bleed brakes manually if not done. An air pocket could cause this too.

 

I forgot to mention LCA Bushings as well. A couple years back a bad LCA on the drivers side of my wife's Sienna caused the wheel to wobble under braking

 

Brake dive can be easily remedied by swapping out the OEM LCA bushings. I swapped mine out for RR Racing’s street version USRS (88 durometer polyurethane bushing)($348), now I don’t have that issue anymore. Hope this helps.

 

That is very likely I will try that Thankyou!

 

You’re welcome!

 

I had the RR Racing LCA bushings, and they were awesome, but way too stiff. More road feel and NVH then I wanted. I ended up swapping them out for RCF LCA bushings. Better road feel then OEM, you pretty much achieve a lot of what you get with the Poly bushings, more comfort, less NVH. Plus they are less than half the cost