What steps should be taken to clean the fuel injector bores in the N55 six-cylinder engine on the 2008 BMW 335i?

Only use the following procedure if injector bores are dirty. To clean the injector bore, slide the injector, without uncoupling the element but with a new PTFE sealing ring, in and out of the injector bores several times. Replace the PTFE sealing ring after cleaning. Clean the contact surfaces of the uncoupling element and cylinder head, then replace the uncoupling element.

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2008 BMW 335i Fuel Injector
Part Number: 13538616079
$758.85 MSRP: $930.04
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Product Specifications
- Other Name: Rp Injector; Injector
- Replaces: 13-53-7-565-138, 13-53-8-648-937, 13-53-7-585-261, 13-53-7-537-317
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 13538616079
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
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Fits the following 2008 BMW 335i Submodels:
- Convertible(E93), Coupe(E92), Sedan(E90)

2008 BMW 335i Fuel Injector

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2008 BMW 335i Fuel Injector Parts Questions & Experts Answers

Q:
What steps should be taken to clean the fuel injector bores in the N55 six-cylinder engine on the 2008 BMW 335i?
Posted by Arlin S.
A:
Only use the following procedure if injector bores are dirty. To clean the injector bore, slide the injector, without uncoupling the element but with a new PTFE sealing ring, in and out of the injector bores several times. Replace the PTFE sealing ring after cleaning. Clean the contact surfaces of the uncoupling element and cylinder head, then replace the uncoupling element.
Answered by BMW Parts Specialist Brad / Jun 20, 2026

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Alternate Year Models

2007 BMW 335i Fuel Injector 2009 BMW 335i Fuel Injector