There's no mistaking a leaking exhaust system - your neighbors will tell you that. It could be a bad muffler, a broken gasket, or even a missing exhaust hanger. Whatever's causing the racket, you'll find a quality OEM replacement in this section. Or, if you're looking for better flow and enhanced performance, be sure to browse our selection of upgrades as well.
Oxygen Sensor
The oxygen sensor measures exhaust gases, then sends a signal to the fuel injection control unit to set the correct fuel air mixture for the engine to run correctly. If the oxygen sensor fails, it can cause rough running and poor fuel economy.
11-78-7-512-002-M14
Oxygen Sensor Left After Catalyst Length = 450 mm (1 Per Car), 645Ci Conv. Brand: Bosch [More Info]
$126.75
11-78-7-512-567-M14
Oxygen Sensor Right After Catalyst Length = 325 mm (1 Per Car), 645Ci Conv. Brand: Bosch [More Info]
$126.75
11-78-7-516-150-M14
Oxygen Sensor Right Before Catalyst Length = 650 mm (1 Per Car), 645Ci Conv. Auto Trans Brand: Bosch [More Info]
$175.50
11-78-7-521-705-M14
Oxygen Sensor Left Before Catalyst Length = 620 mm (1 Per Car), 645Ci Conv. Auto Trans Brand: Bosch [More Info]
$150.75
Actuator - Trunk Lock
51-24-7-840-617-M9
Trunk Lock Actuator, 645Ci Conv. Brand: Genuine BMW [More Info]
$66.25
Exhaust Gasket
11-62-7-505-789-M17
Exhaust Manifold Gasket Cylinder Head to Manifold, 645Ci Conv. (4 Per Car) Brand: Victor Reinz [More Info]
$7.25
Anti-Seize Lubricant
Using a quality anti-seize lubricant now can save you hours of pain-staking work the next time you attempt to remove that old hardware. These premium compounds offer high temperature resistance, corrosion protection, and good electrical conductivity.
