bcg02

Hi all, I just picked up a nice 03 RX with 137k. Appears to have been well maintained, with dealer service records online. It drives great and gets about 21 mpg with mostly city driving.

I am notoriously picky when it comes to car issues, so I am thinking this may all be in my head -but if I have the car in park, there is absolutely no noise and idles smooth. However, shifting into D with my foot on the brake results in a *very* minor increase in noise, almost a low pitch hum. Shifting back into park eliminates the noise.

Other than that, the car idles and sounds like new. 750 rpm idle speed. I changed trans/transfer case/ rear diff/engine oils upon purchase. All looked great with no signs of wear.

Is this low hum normal? Anything notable to check? I pulled one of the plugs last week, and it looked like it had been replaced recently, was a NGK plug in good condition and color.

hypervish

Welcome to Club Lexus!

The vibration in "D" is kind of a common thing. People have tried replacing motor mounts and transmission mounts, but the vibration usually persists. If you do a search you will find a bunch of threads on that.

I don't have the vibration all the time. It comes and goes. I don't mind it, it still run's like a champ!

amblyn

i have this vibration more of a hum then vibration but its from a small i mean small exhaust leak. so small like a penny would be 2x size of my leak. so may wanna check that out. also does it do it hot or cold?? mine louder when cold outside no matter how hot engine is