I'm going on 140,000 on my 03' MCS. It runs great, but I'm wondering if I should go through and clean any sensors....just because. I'm assuming it's got a MAF sensors that can be cleaned.....most cars do. Where is it, and what's the best way to clean it. Any other senors on these motors that need to be cleaned out? What about an EGR valve?

Thanks!

 

No cleaning of any sensors is needed.

No EGR either.

If you're having a problem, replacement will be the best course of action. Cleaning only works a small percentage of the time long term.

 

Not having any problems, but at 140,000 miles....I thought that if there was anything to clean, it might be a good idea to do it. If a sensor is dirty, there is a possibility that it's giving a slightly off reason to the DME, but not bad enough to throw up a CEL.

 

No MAF sensors on the R53s...
They do have two MAP (manifold absolute pressure) sensors instead...

As to other sensors such as Cam/Crankshaft sensors, cleaning wouldn't really do anything as they react to magnetic pulses produced from the cam/crankshafts.