What happens to the car when a solenoid fails in an S85 engine? - BMW M5 Forum and M6 Forums
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post #1 of 3 Old 20th July 2016, 07:48 PM Thread Starter
GaretJax
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What happens to the car when a solenoid fails in an S85 engine?

Hello all,

I ran the DIS test on the solenoids in my S85 engine and one of them was just out of range. The other 3 were just within range. What happens when a solenoid goes bad? Are solenoids something to be replaced proactively or do I wait until I get a failure to replace it?


Given the current cost of them I imagine it doesn't make sense to replace all 4 if one has gone bad.

Last edited by GaretJax; 20th July 2016 at 08:13 PM.
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post #2 of 3 Old 21st July 2016, 01:02 AM
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What happens to the car when a solenoid fails in an S85 engine?

Crap. Deleted my post. I thought you meant ignition solenoids. But it implied VANOS actuator solenoids. A solenoid is a coil, part of the motor structure in the actuator. Sorry for the confusion. See next post for the answer :-)

Last edited by rt7085; 21st July 2016 at 03:15 AM.
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post #3 of 3 Old 21st July 2016, 01:30 AM
5soko
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Nothing happens when the solenoids fail really. No error codes most of the time aswell, almost all the time no codes or CEL to be honest.

I drove around for almost 3 years with failed vanos solenoids and i didnt even know..
Most guys have failed solenoids and dont even know it.

Loss of low end response and tq, and idle fluctuation sometimes is what is the outcome of failed solenoids with 'not ok' test parameters.

Last edited by 5soko; 21st July 2016 at 01:31 AM.
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