Replacement Intake Boot - E28 535i, E24 635csi, E23 735i (13541707080)
Common source of intake & vacuum leaks, poor idle, rough running, and lean condition codes. Replaces BMW part #13541707080 (13-54-1-707-080)
Only for cars produced before 6/1987
The rubber intake boot connects the air flow sensor with the throttle body on the E28 535i, E24 635csi, E23 735i. It's after the air filter and mass air meter so any rips or tears on the boot material will allow unfiltered and unmetered air into the engine. And since vacuum and air pressure within the engine are closely managed, any air leak can be a serious problem. Air leaks from a cracked intake boot can cause your E28, E24, or E23 to run rough, poor idle, throttle surging, stumbling, hesitations, and misfires. These can be caused by other things but a leak in the intake boot is easy to check and inexepensive to fix! This is a less expensive aftermarket version of the original BMW rubber intake boot and comes with a two year warranty.
E28 (82-88) > 535i
E24 (77-89) > 635CSi
E23 (77-87) > 735i