Wednesday, July 20, 2011

D.I.Y – How to change crankshaft sensor on Facelifted BMW E46 2.0 (N42B20)

D.I.Y – How to change crankshaft sensor on Facelifted BMW E46 2.0 (N42B20)

Dear all, gentle reminder – please do this at your own risk
Disclaimer – I won’t take any responsibility for any injuries, fatal, broken parts, or anything whatsoever due to doing this yourself. Please get expert advice before doing this.

1st step – Open your hood and make sure your engine cold before get started. Remove battery terminal for precautions.

2nd step – Remove engine plastic cover as picture shown, do it slowly to prevent crack on this cover. Remove intake cover.

3rd step – Now remove MAF/air mass box.

4th step – Dismantle socket slowly as picture below.

5th step – Dismantle vacuum flow underneath the intake manifold. this located underneath throttle body.

6th step – Loosen all bolt & nuts on the intake manifold and slowly pull out the intake manifold. This could be quite difficult if you do this alone but I was doing this myself. After this step you may see the crankshaft sensor below.

7th step – Now you are almost done, remove the faulty sensor and replace with new sensor. Finally, replaced all parts that have been taken out reversely and you are done. Approximate work time – 2 hours or less. I make this done within 90 minutes.

8th step – Start your engine and go for a test drive within your house area to warm-up your car for an hour or so. Enjoy your UDM.

Tools for this job – star keys, Allen keys, 11mm socket box, L handle/ratchet, Philip screw driver, 10mm socket box. You might need other tools as your car may use different bolt/nuts.

That’s all, hope this info useful. If you have any request that doesn’t contain here, kindly send me a mail at

Kindly request via email if u need larger picture.





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