Hoping some of y'all who have (2) GSs with stock brakes will give me some feedback, and/or that you guys who know a lot about brakes will comment. THANK YOU in advance.

I have (2) identical 2018 GS F-Sport AWDs. Only differences between them is color and one has 40 some thousand miles and the other 70 some thousand. Bought the 40k one last year and the 70k one a couple weeks ago. Both were religiously maintained at the local stealership - according to the records - and both appear to be in excellent overall condition.

My question or concern is that the 70k one takes more brake pedal pressure to effect the same momentum change as the 40k one - or, in other words, more brake pressure to slow or stop the 70k one than the 40k one. I just had the brakes, rotors and shims redone on the 70k one today and it doesn't feel any better. (needed the work regardless).

Is this just to be expected as just a normal quirk between two vehicles because they're assembled, man made, mechanical systems, or is it an indication of some known difference in an adjustment or something failing, etc.?

Appreciate your assistance!

 

I would bleed that one with the soft pedal and go from there. That's an hour of your time at minimal cost to get a quick answer.

 

Exactly what did you have done to the Brakes? New, Turned? What? What brand Rotors/Pads?

 

thanks for your help, guys.

they replaced the front pads and resurfaced the rotors; and replaced the rear pads, rotors and shims. a pre-purchase inspection showed the shims had been removed at some point in the past.

 

A few things. First when Rotors get low and/or are Turned. The Pedal will go lower that comparing a thicker set of Rotors. Braking is going to be less also. It could also be the Pads that have the Pedal lower also. Don't know what Pads or Rotors you used?

If the car had for example Akebono pads. In spite of Akebono design and specific instructions, many still put the stock Shims on them incorrectly. It ends up double shimming. Could be why there were no shims on the pads due to that Akebono and a few others have a built in backing designed for No 2nd shim should be used at all.

I think what you are feeling is a result of the 2 different cars having different brake Rotors, and different Pads. One more thing lots don't know is some aftermarket companies show 1 pads part number on front for both the F Sport larger Rotors and Lux/Base smaller Rotor. The pads should be different being the Factory Lexus Pads are a bit bigger for the F Sport. The Base/Lux pads will fit, but there is a little less contact surface area if the Base/Lux pad is used on the F Sport. Comparing would feel like, for like that the F Sport pads would bite better and feel a slight difference. Without knowing what exact pads you had on there, and replace? That also can contribute. It took me a min of ownership and upgrading my own Lux to the bigger F Sport Rotors to realize that the smaller Pads are not the best for the F Sport larger Rotors.

 

THANK YOU, jgscott, for taking time to give me the benefit of your experience and providing such a thorough and educational response. really appreciate it!!!