ecu location?

[thamesc180k]

hi again, please tell me where the engine ecu is located.
is it strapped to the air filter box housing ?
Can one remove the plug and inspect it and clean it if required?
should the battery be disconnected first?
04 w203 m271 1.8K]
thanks Karl

 

[W1ghty]

hi again, please tell me where the engine ecu is located.
is it strapped to the air filter box housing ?
Can one remove the plug and inspect it and clean it if required?
should the battery be disconnected first?
04 w203 m271 1.8K]
thanks Karl

Yep it’s the big plug to the right of the air box as you face the engine from the front .
I did disconnect the battery when I checked mine .

 

[johnsco]

Why would the OP (and W1ghty and me) want to clean the engine ecu on the M271 engine ?
Is this something I should look at ?
I've had the car about 4 years and I haven't done it yet.

 

[W1ghty]

Why would the OP (and W1ghty and me) want to clean the engine ecu on the M271 engine ?
Is this something I should look at ?
I've had the car about 4 years and I haven't done it yet.

I think at around 80k miles I checked the electrical connections to the cam magnets before fitting the wire blockers , I think there was oil in one of the electrical connections .
I checked the ecu to see if any oil had made it there .
It was a while ago , I forget the timeline of events .

 

[johnsco]

At about 95,000 miles, I changed the cam magnets as they were both leaking.
I fitted the pigtail extensions at that time.
There was not a lot of oil on the connectors or the wiring.
Perhaps I should take a look for reassurance.

 

[W1ghty]

At about 95,000 miles, I changed the cam magnets as they were both leaking.
I fitted the pigtail extensions at that time.
There was not a lot of oil on the connectors or the wiring.
Perhaps I should take a look for reassurance.

I wouldn’t bother , if there was oil in the ecu or the O2 sensor you would have had issues .

 

[johnsco]

I wouldn’t bother , if there was oil in the ecu or the O2 sensor you would have had issues .

I did wonder.
I've certainly had no issues