03 Q45 brake and vibration

[datdamd03]

HI, I have an issue with the driver front caliper engaging and not releasing right away would this be the caliper or something else I do have to r & r the booster can this cause the caliper to act this way?
Also I can drive along and all of a sudden the car starts to shake at 45 mph once I slow down its not as bad but I can speed up and it goes away fro a few mins then back to the shakes also feels like the brakes are being applied as I drive.

any help would be greatly appreciated

[elwesso]

Welcome to NICO!

I would check the caliper, and also the brake hose. I had an issue on another vehicle (not Nissan/infiniti, but same year) and the brake hose actually collapsed internally or got something lodged in it, making it seem like the caliper was bad but it actually wasn't...

You can verify this if the caliper is dragging, crack open the bleeder and see if it releases.. If it releases when you crack the bleeder, then it's probably the hose. If it doesn't release, then that means the caliper probably needs replaced..

I don't think booster issues are common on this car, so IMO it either has to be the caliper or line.. You could probably replace both for under $100 and be guaranteed a fix..

Regarding the vibration, I'd have the rotors turned while you have the brakes apart, and that will probably fix it. Otherwise you might have some other suspension issue that's causing this (perhaps a tie rod end or something?). I'd fix the known issues first.

[datdamd03]

Thanks for the feedback I will try that

[life602]

Mine was vibrating after 50mph, the dealership and I argued about it being the lower a-arm. After some more checking and 2 days later from leaving the dealership one of the bushings was leaking some clear gooi oil and I checked here and surely not it was my lower a arm.another thing that could cause this is your inner tie rods I also had them replaced and before I did it was also shaking but it was after like 60-65 mph