2016-2019 BMW 7 Series 4.4 Piston & Rod 11258665195
Specifications
OEM number
11258665195
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
Piston and Rod Assembly
Engine Piston with Conrod
Connecting Rod Assembly
Piston Assembly
Piston with Rod
Conrod and Piston
What this part does
The piston and connecting rod assembly forms the core moving component of the engine's rotating assembly. It travels vertically within the cylinder block to compress the air and fuel mixture, directly receiving the explosive force of combustion and transferring that energy to the crankshaft. The piston is engineered to withstand extreme cylinder temperatures and pressures, utilizing precisely machined grooves for oil and compression rings to seal the combustion chamber. The connecting rod handles immense mechanical stress as it translates the linear motion of the piston into the rotational motion of the crankshaft.
When a piston or connecting rod fails, it is typically due to oil starvation, hydro-locking, or severe pre-ignition (detonation). Symptoms of failure include heavy engine knocking, a complete loss of compression in the affected cylinder, excessive oil consumption, or catastrophic damage where the connecting rod breaches the engine block.
Fits these vehicles
| Make | Model | Years | Engine |
|---|---|---|---|
| BMW | 750i xDrive (G11/G12) | 2016-2019 | 4.4L V8 |
| BMW | M550i xDrive (G30) | 2017-2019 | 4.4L V8 |
| BMW | X5 xDrive50i (G05) | 2019-2020 | 4.4L V8 |
| BMW | X7 xDrive50i (G07) | 2019-2020 | 4.4L V8 |
| BMW | 850i xDrive (G14/G15) | 2019-2020 | 4.4L V8 |
OEM and interchange numbers
11258665195
11-25-8-665-195
11 25 8 665 195
8665195
Before you order
- Verify the specific engine variant in your vehicle. This assembly is designed for the BMW N63TU2 / N63R 4.4L V8 engines, which have distinct piston profiles compared to earlier N63 iterations.
- Check the weight grading mark stamped on the crown of your original piston. Maintaining matched weight classes across the rotating assembly is critical for proper engine balance and preventing vibration.
- It is strictly recommended to install new piston rings and new connecting rod bearings when fitting a used piston assembly into an engine block.
- Inspect the cylinder wall of your engine block for deep scoring or out-of-round wear prior to ordering. A replacement piston cannot seal or restore compression in a damaged cylinder bore.
