Do not attempt to clean your MAP sensor

[jagr]

Hi All,

In the last 18 months I have changed or had changed for preventative maintenance:

Fuel filter
Air filter
Oil separator from toilet roll to vortex
Oil and filter
Pollen filter
EGR thermostat
Main thermostat
Transfer case oil


Removed:

Swirl flaps

Cleaned:

EGR
Inlet manifold

I decided to remove my MAP sensor and give it a clean. Once removed it was full of oil etc.
I cleaned out with carb cleaner and a needle and left it to dry.

Around an hour later I put the car back together and noticed there was no power, felt like a diesel from the 80s.
I plugged my BMW scanner 110 in and it said '3f01 Boost Pressure Sensor - Signal'

I double checked everything in case a pipe etc was left off but nothing.

Looked the fault code up and most said it was usually the MAP sensor.

Today I phoned my local dealers expecting £40-50 but had to pay £103 for a new one.

All fitted and car runs great with no errors.

Expensive lesson.........As they say if it ain't broke.....

[pvr]

Is that the MAF sensor?

[jagr]

[quote="pvr"]
Is that the MAF sensor?
[/quote]

No, it is the Manifold Absolute Pressure sensor.
On my X3 it is at the back of the engine attached to the inlet manifold.

This is my old one: