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Old 02-11-2019, 10:23 PM
Join Date: Feb 2019
Location: Usa
Posts: 9
Magnesiumnitrate is on a distinguished road
Whistle from ABS module

Can someone check their e70 n52 ABS pump module? I don't have any dash lights or drivability issues but while working on unrelated issues I found that I have a barely audible (over the regular engine noise) whine/whistle coming from the ABS pump module.

I isolated it from other engine noises using the ghetto 3/8ths extension stethoscope method. It's definitely coming from the ABS module and those are not cheap new...

Change brake fluid? What's a good next step? I'm hoping if there is an issue that I found it early and can prevent losing the pump.
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