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      10-05-2015, 10:35 PM   #1
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F30 N55 Ecu Removal Step By Step

Yes I am getting a flash tune, my ECU is already on its way to ENZO. Buy I decided to do a DIY for the removal of the ECU can be a little tricky.

Tools you will need
A brain
11mm socket and ratchet
10mm socket
8mm socket
E8 socket
T25 torx

some small flat head screw drivers to use for prying or some type of needle nose pliers.

DO THIS AT YOUR OWN RISK, I AM IN NO WAY RESPONSIBLE IF YOU DAMAGE, BREAK OR HURT YOURSELF.

This is mainly pic heavy with instructions. To reassemble just follow everything in reverse.

Follow the photos its pretty much the order everything needs to go in. I apologize if I left anything out there may be random wires I did not take photos of and how they are stowed, but one should be able to see how to remove them.

This is not very easy and takes time and patience. If you don't feel confident doing it do not, take it to a shop.
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Last edited by Dejan_; 10-05-2015 at 11:16 PM.
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      10-06-2015, 10:57 AM   #2
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      10-07-2015, 12:11 AM   #3
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      10-07-2015, 12:35 AM   #4
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      10-10-2015, 01:36 PM   #5
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      10-20-2015, 01:22 PM   #6
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      10-20-2015, 07:12 PM   #7
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Been waiting for this! Thank you!
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      10-23-2015, 02:19 PM   #8
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Spectacular post! Now need to decide to do Enzo or GSR flash tune!
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      10-23-2015, 11:46 PM   #9
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Quote:
Originally Posted by tboooe
Spectacular post! Now need to decide to do Enzo or GSR flash tune!
I see in your sig you have a 428i. That ECU removal is completely different and actually about a 5 minute job lol

It sits right on top of the manifold underneath the engine cover.
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      11-16-2015, 12:46 AM   #10
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      04-27-2016, 04:50 PM   #11
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Why oh why did BMW tucked the ECU way in there for the 335i? I have no idea! What a pain!

Very good instruction - I like the pictures.
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      04-27-2016, 04:58 PM   #12
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Quote:
Originally Posted by _bdiddyb_ View Post
Why oh why did BMW tucked the ECU way in there for the 335i? I have no idea! What a pain!

Very good instruction - I like the pictures.
Thats what I'm saying, N20 is 10 minutes.. but Mercedes new car C450 is right there even easier
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      04-27-2016, 05:55 PM   #13
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Quote:
Originally Posted by _bdiddyb_
Why oh why did BMW tucked the ECU way in there for the 335i? I have no idea! What a pain!

Very good instruction - I like the pictures.
No one can answer that question but BMW themselves, perhaps room was the issue or cooling as obviously here is an opening in the manifold that cools part of the ECU.
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      04-28-2016, 09:13 AM   #14
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ISTA/D Rheingold

Excellent post.

Here's some additional (or same) information from the ISTA/D Rheingold.
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      04-28-2016, 09:50 AM   #15
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Great instructions. Thanks.
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      06-01-2016, 04:01 AM   #16
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I feel good about taking it off... But what about putting it back??? Wish there was another detailed and perfect post... Wink wink
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      06-01-2016, 09:37 AM   #17
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Quote:
Originally Posted by Justinandwhat
I feel good about taking it off... But what about putting it back??? Wish there was another detailed and perfect post... Wink wink
Lol
Just follow it all in reverse. My advice is always bag your bolts and label them with a sharpie. NEVER force anything in. Take your own photos as you go along to use as reference later or write down what you're doing. I know it sounds stupid but for big projects it will save you at times.
Remember it's not a race.
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      06-01-2016, 12:14 PM   #18
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Quote:
Originally Posted by dd1981 View Post
Lol
Just follow it all in reverse. My advice is always bag your bolts and label them with a sharpie. NEVER force anything in. Take your own photos as you go along to use as reference later or write down what you're doing. I know it sounds stupid but for big projects it will save you at times.
Remember it's not a race.
Were there lots of wire to tug in place or organize when u tried to put it back on?? I might just back off and drive to Enzo in ny. I'm like 10 hours away from them
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      06-02-2016, 09:04 AM   #19
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Quote:
Originally Posted by Justinandwhat
Quote:
Originally Posted by dd1981 View Post
Lol
Just follow it all in reverse. My advice is always bag your bolts and label them with a sharpie. NEVER force anything in. Take your own photos as you go along to use as reference later or write down what you're doing. I know it sounds stupid but for big projects it will save you at times.
Remember it's not a race.
Were there lots of wire to tug in place or organize when u tried to put it back on?? I might just back off and drive to Enzo in ny. I'm like 10 hours away from them
The main ECU harnesses are routed and stacked neatly but not necessarily in any order. The connections are keyed so none of the hard shells will fit into wrong plugs. The key is to follow that order I gave because it exposes the release tabs l, so don't tug or pry l, once you break the shell or cam lock you're in for a headache.

Many have done this, it's not that hard. BUT if you are worried and want to take the drive to Enzo, you will benefit much more being in their facility due to the fact that once they crack the ECU, they will fine tune the car on the dyno, and that beats the crap out of just having a basic mail order flash because they can and will extract more out of it. Especially if you have a EWG car that has the bigger turbo impeller and down pipe.

Good luck
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