Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
13 53 310 Removing and installing/replacing an injector (N55)
Observe WARNINGS ON REMOVAL OF THE INJECTORS without fail!
There are two different injector versions and hold-down device versions for the N55 engine.
A mixed installation of the components (hold-down device, spark plug shafts, injectors, cylinder heads and screws) between the two hold-down device versions is not possible/permitted!
Removal and installation of the various injectors are described separately according to the hold-down device version.
The hold-down device version must be identified beforehand in order to select the correct repair instructions.
Remove ACOUSTIC COVER
The bottom hold-down device version can be found on the electromagnetic compatibility panel (1) installed above the injectors.
- REMOVING AND INSTALLING INJECTOR up to engine number 14407684 .
- Only E70, E71:
Removing and installing injector up to engine number 02167648 .
The top hold-down device version can be found on the hold-down device installed on top (1).
- REMOVING AND INSTALLING INJECTOR from engine number 14407685 .
- Only E70, E71:
Removing and installing injector from engine number 02167649 .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.