At CRP Automotive, we’d been hearing from a lot of our customers about a no-start condition after replacing BMW starters — even when the repair technician did everything correctly.
These reports have been about multiple BMW 3/5/X3/X5/Z4 series ranging from 2006 to 2016.
Sometimes the engine will start at the shop, but a week or two later when the customer has the car, it will refuse to start.
One reason behind the no-start situation may not have anything do to with the technician or the starter — and everything do with the starter bolts. You see, the bolts for these starters actually serve a dual purpose: to secure the starter and also to ground the starter.
These aluminum torque-to-yield or “stretch” bolts are uncoated as supplied from BMW. Coated bolts interfere with the grounding of the starter, causing the no-start situation. So make sure you are using Rein Automotive aluminum bolts, which are not coated and allow for the proper grounding of the starter.
Rein Automotive part number: HWK0039
Rein bolts also come with the correct torque specs. Which brings up a final bit of advice: keep in mind that the starter mounting bolts are single-use only. You should not re-use previously torqued bolts when reinstalling a starter.
Have any questions about starters for late model BMWs or any other Rein Automotive parts — or maybe even an idea for a future Inside the Brands video? Please email us at firstname.lastname@example.org or leave us a comment below or on our Facebook page.