nmlexus4gs

Currently I have 39k miles on the car, recently I noticed that at low speed when i brake, i feel little vibrations (even passenger can feel it). When I took my car for service at 35k, dealer mentioned that brakes and tires are ok. I will like some comments to identify the issue. I will be taking my car for 40k service soon.

pqn628

most likely bad rotors...either get them resurfaced or get new ones installed.

2GR

Agreed. My thoughts exactly.

AJLex19

Start with checking the rotors...it could be wheels out of round - have that checked as well.

er34

Try to do a few heat cycles on an empty road to remove any prior pad material deposit on the rotors.

50MPH, hard brake to 5MPH, repeat this 3 times without coming to a full stop, then drive 10 minutes to let the brakes cool back down, avoiding stops if possible. Park the car, but don't set the parking brake.

If that fails, you'll likely need to replace the rotors and pads if it bothers you.

HontoKuro

Check for the basics.
1. Brake Pad Issues
2. Brake Rotor & Disc Issues
3. Alignment Issues
4. Worst case worn Suspension Components
5. Check your tire pressures and make sure they are fine.

Likely #2

nmlexus4gs

Just to close this, The vibrations were gone once front rotors were resurfaced and brake pad replaced.

ibidu1

iTrader: (1)

It happens when you drive the car hard, and either water sprayed on the rotors from a car washing or from water puddles. Sometimes if you keep driving them hard, they may after time straighten back up. If they are badly warped I wouldnt cut them down until they straighten themselves a bit so you dont remove too much material off the rotors. This happened to me, and I had terrible vibrations, now mostly gone!

Or you can replace the rotors and pads with new ones. But whatever driving style you did to cause the warp, if you dont change it, the new rotors will warp aswell.