M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Specific conversations and info for the BMW E28 M5 and M535i.
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abdoul
Posts: 2
Joined: Feb 12, 2021 4:19 AM
Location: Potomac MD

M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by abdoul »

Hello I own a 1985 BMW m635csi but my ECU had vanished from the previous body shop while the car was being restored 10yrs ago. so I am out of luck.

Anyone has a source of Bosch 0 0261 200 055 ECU for my M635csi or anyone know an alternate Bosch ECU that might work with the M35csi until I find a proper ECU 055? unless I could also implement a custom solution .... Custom/programmable ECU? VIN: WBAEE31090XXXXXXX
abdoul
Posts: 2
Joined: Feb 12, 2021 4:19 AM
Location: Potomac MD

Re: M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by abdoul »

OK. I will ask THE question and face the consequences... :laugh:
Instead of the BMW ECU 0261200055
Will I be OK, if in the meantime, I attempt to install another ECU allowing me to limp with the car or drive suboptimally until I source one 055 less than $1200?

BMW ECU 0261200059 ?
BMW ECU 0261200179 ?
MannyE
Posts: 300
Joined: Aug 21, 2008 8:08 PM
Location: San Diego, CA

Re: M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by MannyE »

You have the M88 engine?
MannyE
Posts: 300
Joined: Aug 21, 2008 8:08 PM
Location: San Diego, CA

Re: M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by MannyE »

I might be able to help if you have the S38 engine.
m535is
Posts: 1318
Joined: Feb 12, 2006 12:00 PM
Location: Greenville SC
Contact:

Re: M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by m535is »

You can use the 079 from the US M5/6 as long as you change the chip to one from a euro car. I ran an 079 with a euro Dinan chip for over 20 years with no problems. Keep searching for an 055, they are out there.
VintageRacer
Posts: 46
Joined: Oct 25, 2017 12:11 PM
Location: Waco, TX

Re: M635csi ECU HELP. Need 0 261 200 055 or ALTERNATIVE

Post by VintageRacer »

Why not run a MS2 PnP?
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