2016-2019 BMW 7 Series 4.4L Fuel Injector 13648638255
Specifications
OEM number
13648638255
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
Fuel Injector
Direct Injector
Injection Valve
Fuel Nozzle
DI Injector
What this part does
The fuel injector is responsible for delivering a precise, high-pressure spray of atomized fuel directly into the combustion chamber. Governed by the engine control module, it opens and closes in milliseconds to maintain the exact air-to-fuel ratio required for the current engine load. It is mounted directly into the cylinder head, where the tip is exposed to extreme temperatures and combustion pressures.
When this component fails, it typically gets stuck open or clogged. A leaking or stuck-open injector will dump excess fuel into the cylinder, causing rich misfires, black smoke from the exhaust, and a strong fuel odor. If left unresolved, the unburnt fuel can wash the lubricating oil off the cylinder walls, accelerating engine wear, and can melt the catalytic converter. A clogged injector causes lean misfires, hesitation under acceleration, and rough idling.
Fits these vehicles
| Make | Model | Years | Engine |
|---|---|---|---|
| BMW | 750i xDrive / 750Li xDrive | 2016-2019 | 4.4L |
| BMW | M550i xDrive | 2017-2020 | 4.4L |
| BMW | X5 xDrive50i | 2014-2018 | 4.4L |
| BMW | X6 xDrive50i | 2015-2019 | 4.4L |
| BMW | 650i / 650i xDrive Gran Coupe | 2013-2019 | 4.4L |
OEM and interchange numbers
13648638255
13-64-8-638-255
8638255
Before you order
Verify your original part number matches the OEM number provided above, as BMW utilizes several different injector revisions across their V8 engine range that are not cross-compatible. Direct injectors require flow-rate coding to the engine control module (DME) upon installation. A unique calibration value is printed on the body of this injector and must be programmed using professional diagnostic software to ensure smooth idle and proper fuel trim.
Never install a used direct injector without replacing the Teflon combustion chamber seal and the metal decoupling ring. Reusing the old Teflon seal will result in immediate compression leaks and potential damage to the cylinder head bore. Special tools are required to resize the new Teflon seal before seating the injector.
