Distributor Rotor for E28 & E24

replacement part. OEM-quality replacement rotor for M30 injected engine. If your idle is rough and/or if your car is running poorly, there's a good chance it's the distributor cap and rotor. (You should replace the spark plugs as well, and check the plug wires.) It's realistic to expect to change the cap & rotor every 30,000 miles. Fits the following cars: E28 533 - 01/1984 and later E28 535i/is - 1985-1988 E28 M5 - 1988 E24 633CSi - 01/1984 and later E24 635CSi - 1985-1989 E24 M6 - 1987-1988 E34 535i - 1988-1993 E34 M5 - 1991-1993