2016-2019 BMW 7 Series 4.4 Vacuum Pump 1166863412001
Specifications
OEM number
1166863412001
Donor year
2016
Body style
Sedan
Fuel
Gas
Engine size
4.4 L
Transmission
Auto
Drivetrain
AWD
Suspension
Air
Trim
Xdrive m package
Donor mileage
87000
Paint code
A89 Imperial Blue Brilliant Effect
About this part
Also known as
Brake Vacuum Pump
Engine Vacuum Pump
Mechanical Vacuum Pump
Brake Booster Pump
Vacuum Supply Pump
What this part does
The Vacuum Pump is a mechanically driven component attached to the engine cylinder head, typically powered by the camshaft. Its primary function is to generate negative pressure for the brake booster, ensuring the brake pedal remains responsive and easy to press. On many BMW V8 engines, this vacuum circuit also manages exhaust flap actuators and other pneumatically controlled systems.
When this pump begins to fail, the most immediate symptom is a hard or stiff brake pedal, especially on cold starts or after repeated braking, due to a loss of power assist. Internally, the pump can wear out and lose suction efficiency. Additionally, the seal between the pump and the cylinder head is a notorious point for oil leaks, which can drip down the engine block or onto the exhaust, producing a burning oil smell.
Fits these vehicles
| Make | Model | Years | Engine |
|---|---|---|---|
| BMW | 750i xDrive | 2016-2019 | 4.4L |
| BMW | 750Li xDrive | 2016-2019 | 4.4L |
| BMW | Alpina B7 | 2017-2019 | 4.4L |
| BMW | M550i xDrive | 2018-2019 | 4.4L |
OEM and interchange numbers
1166863412001
11668634120
11 66 8 634 120
Before you order
Match the 11-digit BMW part number stamped on your original unit to confirm exact compatibility. The V8 engines require a specific pump design that differs entirely from the inline-six variants.
This is a purely mechanical component and requires no electronic coding or programming to function. However, the rubber O-ring that seals the pump to the cylinder head hardens over time and should not be reused. You must install a brand-new mounting gasket during installation to prevent engine oil leaks. It is also recommended to inspect the internal vacuum lines connecting to the brake booster for any signs of oil intrusion, which indicates the internal check valve on your old pump may have failed.
