Models covered:

3-Series (E30)
316 (83 to 88), 316i (88 to 91), 318i (83 to 91), 320i (87 to 91), 325i (87 to 91).
5-Series (E28)
518 (81 to 85), 518i (85 to 88), 525i (81 to 88), 528i (81 to 88

PRICE: 3.5 USD