From the airbox to the intake manifold, air is routed to the engine at a defined volumetric rate that allows optimum combustion for specific levels of performance. Any alteration or failure within this system can therefore cause drivability problems like hesitation or rough idling. You can try cleaning and sealing these components as much as you want, but more often than not, installing brand new OEM parts is the best cure for these types of problems.
Air Filter
It's important to make sure that your air cleaner is clean at all times. The cleaner filters outside air before it enters your engine. Dirty air filters will constrict the air flow, and reduce your overall horsepower and gas mileage. You should replace
Air Filter, 745i (1 Per Car)
13-71-7-505-007-M63
Air Filter, 745i (1 Per Car) Brand: Mann
$16.75
13-71-7-505-007-M67
Air Filter, 745i (1 Per Car) Brand: Mahle Filter
$15.50
Air Filter Housing Clip
51-47-1-919-209-M9
Rivet Plastic for Air Ducts, Interior Trim Panels, Engine Air Intake Ducts, 745i Brand: Genuine BMW
$0.50
Air Cleaner Parts
Air Cleaner Seal
13-71-1-720-540-M9
O-Ring for Air Filter Housing 79 X 6 mm, 750i 2 Per Car Brand: Genuine BMW
$3.75
Air Boot Rubber Ring
13-71-1-736-195-M9
Rubber Ring for Air Flow Sensor Boot at Air Flow Sensor, 745i Brand: Genuine BMW
$6.50
13-71-1-747-985-M9
Rubber Ring for Air Flow Sensor Boot at Throttle Body, 745i Brand: Genuine BMW
$7.75
Air Filter Cleaner Kit
55-0819-555-M318
Air Filter Service Kit for High Performance Air Filter (K&N) Contains: (1) 12 oz. Filter Cleaner (Squirt Bottle) (1) 6.5 oz. Filter Oil (Aerosol Can), 745i Brand: K&N
