Thinking of upgrading to a 2004 S40 from my 2002. Just wondered if the new disc brakes and pads I just had installed on the 2002 last month would fit on the 2004?

After further evaluation I do believe the problem was the brake booster, thank you Jimmy. Since the whining has stopped the brakes do work fine except first thing after start up and during emergency stops they require a lot of pressure and are very soft.

I've been using Synthetic a long time, since 1984. and I really like it. One thing I've noticed it does is clean up the inside of the engine. Very noticeable on the cars I had with mechanical lifters that needed adjustment periodically but also on the S40 when I first bought it there was black gook ...

the brakes seem to be working fine and the noise has stopped, for now anyway, but thanks for mentioning that, I will be cognoscente of it in the future.

Quick update, I thought some might be interested. Took the car in for service and the tech said he couldn't hear the problem. Went and picked it up an the noise had completely stopped. I even put a sound-scope on it and heard nothing and it's running fine. So either it cured itself, for now, or it i...

I put a sound-scope on the gadget which I now believe is the forward fuel pump and it is making a whining sound. Whether or not that is bad is hard say. I don't recall it making the noise before but maybe I just never noticed it. The car is running fine.

that link was very helpful, thank you. My car is running and idling fine so I think it's probably a problem with one of the pumps rather than the regulator. I think I might be able to change the main pump myself but I don't think I want to tackle the one in the tank. Did that on a Sebring once, no b...

Hello, hoping I can get some helpful info until the manual I ordered arrives. There is a high pitched whine coming from a little gadget that is attached to the firewall under the fuse box on the drivers side. It also gets very hot. The frequency is the same as the sound that last a few seconds after...

Thank you, that gives me something to search for. I didn't know they had two fuel pumps. I think I might have posted this in the wrong place so my apologies.

Hello, hoping I can get some helpful info until the manual I ordered arrives. There is a high pitched whine coming from a little gadget that is attached to the firewall under the fuse box on the drivers side. It also gets very hot. The frequency is the same as the sound that last a few seconds after...