Project E30 / Ep. 15 / Fixing the Rough Engine Idle

Let's see if we can't knock out these rough idle issues. Here's the OEM BMW part number for the pulse sensor: 12121722570 If you're missing it, first figure out if your year/version of E30 should even have it. If it should, Google that part number and you'll find OEM and aftermarket versions of the part to purchase.