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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics DIY Guides & Discussions Any n55 boost solenoid/pressure converter diy?
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      12-15-2016, 05:51 PM   #1
top ramen
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Drives: Schwarz II 535i
Join Date: Sep 2015
Location: NC

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Any n55 boost solenoid/pressure converter diy?

Anybody replaced their n55 boost solenoid/pressure converter before? Got it replaced about 6 months ago under warranty but now the buzzing is back and I'm out of my warranty period. Just ordered the new part and looking everywhere if there is any diy but couldn't find any. So here I am asking if any of you guys done it and what's the process and difficulty of doing it.
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      04-18-2017, 10:32 AM   #2
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United Kingdom

Drives: 535i se auto saloon
Join Date: Oct 2015
Location: Spalding Uk

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Hi , I replaced mine following a "powertrain malfunction" message. It's quite easy.

I'm not sure if you have located it. I guess you can follow the buzzing sound.

It's fastened to the top cover of the engine to the left (looking from the front) very close to the suspension turret. ( You can follow the small ( ~8mm) pipe from the actual wastegate actuator on the turbo)

Two retaining nuts , (the lower on is quite tricky due to access) ideally you need a deep socket (10mm I think) but then there is not room for the wrench for fit in the socket. I used pipe grips on the socket.

Disconnect the electrical connector
twist the vacuum pipes to free , then simply pull off.

Reverse all of the above to re fit.

. The new one I fitted had a different part number and looked a little different. ( The filter on the new one is bigger )
2010 F10 535ise auto saloon, sophistico grey / oyster 331 19"

Last edited by Jrsimp78; 04-18-2017 at 10:39 AM.
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