Msport

dub drifter · 17-05-2025 01:03PM #1

Hi Need sum help,my e90 bmw 2006 msport was driving fine,I only have the car a few months,the turbo was backing off an boost,now it's no boost at all . And it engine sounds different,similar to a v8 engine,any idea where I could find the map sensor or also called boost sensor,was told that it Could be blocked,car guy with e90 estate an youtube saids its located near the black strut top of the engine . But I had a look,in my model it is definitely not there .

CMOTDibbler · 17-05-2025 02:01PM

I think it's the MAF (Mass air flow) sensor you're looking for.

No idea on your car, but it helps to have the right spelling. Who'd have thought it.

dub drifter · 17-05-2025 02:14PM

Yeah I know the maf sensor and ,it's not that actual one that i need to find. This is called the boost pressure sensor,also known as the map sensor. If its clogged up,it can stop the turbo from engaging.

17-05-2025 02:41PM

This maybe what you are looking for

https://youtu.be/4V5eQz2-0l8?si=K0wu23E2S1x6HpUb

dub drifter · 17-05-2025 04:16PM

Thanks for the replys,but this boost sensor is not in this location,my car is a 2006 model m47,I took all the cowling off,If anybody has any idea where,cause cant drive my car like this,no boost at all,I'm back to work Monday,so would really like to find it and solve this issue .

17-05-2025 05:35PM

That is from ISTA for M47 2006 320D

The turbo pressure sensor is mounted directly on the intake air manifold and sealed off with an O-ring. The DDE control unit supplies the sensor with ground (M_LDF) and a supply voltage of 5 V (U_LDF).

dub drifter · 17-05-2025 06:00PM

Thanks for response,is that intake maifold at the top of the engine block,or down near the alternator

17-05-2025 06:33PM

https://www.youtube.com/watch?v=-7D3z8P5cew

dub drifter · 17-05-2025 09:42PM

Yeah I can't seem to find it,the pressure sensor,here's a photo of sum sensors at the very top of the maifold

prawnsambo · 17-05-2025 10:47PM

https://www.boards.ie/discussion/comment/123459232#Comment_123459232

Ease off on the Red Bull and take another photo 🤣. Flash will help.

Also it's 'some' not 'sum'.

dub drifter · 18-05-2025 12:23PM

Yeah that's fair,so guys I found the boost sensor,and cleaned it . but it never made much difference,my car has still got no boost,if anybody has any idea what I should try next ?

19-05-2025 04:08PM

Scan the car for codes and see what fault codes are coming up is your first port of call

Gumbo · 19-05-2025 06:14PM

https://www.boards.ie/discussion/comment/123461251#Comment_123461251

Go to an Indy to get the car read. Otherwise your pi55ing into the wind.

dub drifter · 20-05-2025 07:21AM

Yeah i think that would be good plan to,I just found out i mite have a crack in the manifold,same symptoms has feeling your turbo is at fault,I can also see smoke rising in the engine bay