My 03 Acura CL (70K miles) recently started to have a loud humming noice and vibration only when car is in reverse gear during a cold start. Once the car warms up, there is no such noise when in reverse. Does/did anyone have the same problem?

 

very interesting you brought that up. Just a few days ago did I notice this with my car. Like you said, it's only on cold starts then it goes away. It just started to occur. Hopefully someone knows, but if it goes away, Im not too worried. Cars do crazy things when the car/weather is cold.

 

while my car is warmed up i still get that vibration/ humming too. it doest do it when in park, but when in any gear when idling it vibrates

 

doesnt sound like the same issue as ours.

 

Mine has noise only when in reverse, and no noise when in drive or park. I dount it's gonna go away. I am worried this might come from transmission.

 

and it's louder when your car is in reverse, but your foot is on the brake right? It's louder then if you were to actually go in reverse.

 

Right it's louder when in reverse and foot on brake. It's consistent for the past several weeks. So It's not some random noise that comes and goes.

 

same here. Like I said, I'm not too worried about it since it only does it on cold starts and goes away after like a minute. If it is the trans, dont worry, we're covered.

 

well i found out why my car was vibrating/humming, one of the engine mounts is broken...

 

how to check engine mount? how much does it cost to fix it? thx.

 

Is it possible the noise your hearing is the ABS selfcheck/prime that occurs on cold startups?

 

the mount that my mechanic showed me was the left of the engine, he said it was worn out so the engine is sagging a bit, i didnt get it replaced yet but i think he said it was 100 something