Genuine BMW N20 N55 Fuel Injector - OEM High-Pressure Petrol Direct Injection - Fits M135i M235i 335i 435i 535i 640i 740i X1 X3 X5 (incl. xDrive) - Part 13647597870

BMW N20 N55 Petrol Injector, factory original part for turbocharged GDI engines

Chase away misfires, lumpy idle and poor economy with a brand new factory injector for BMW N20 and N55 turbo petrol engines. This original-equipment high pressure GDI unit restores crisp throttle response, smooth cold starts and consistent fuelling on performance models like M135i, M235i, 335i, 435i, 535i, 640i, 740i plus X Series and Z4. Ideal as a preventative refresh or when adding power upgrades, a fresh set ensures reliable combustion and keeps your six or four cylinder running exactly as it should.

We install these injectors in-house and our customers regularly report cleaner idle, stronger mid range and the end of intermittent fault codes once fitted and coded. If your BMW is showing injector related issues, this is the proven fix.

Key benefits

• Original BMW component for N20 and N55 petrol direct injection applications
• Correct spray pattern and calibrated flow for OEM drivability and performance
• Resolves hard starting, hesitation under load, fuel odour and increased consumption
• Essential maintenance when tuning for more power to maintain safe air fuel ratios
• Direct replacement that requires ECU coding for proper adaptation

Typical symptoms that point to injector replacement

• Engine warning lamp with injector or mixture related fault codes
• Uneven idle, stumble, flat spots or hesitation
• Random or cylinder specific misfires
• Excess fuel smell, diluted oil or poor MPG
• Hard cold starts or extended cranking

What you receive

1 x BMW factory injector for N20 and N55 petrol direct injection engines.

Vehicle coverage

Suits a wide range of E Series and F Series petrol turbo models using N20 or N55. Common applications include:

• 1 Series
  • E82, E88 135i
  • F20, F21 125i and M135i including xDrive
• 2 Series
  • F22 M235i including xDrive
• 3 Series
  • E90, E91, E92, E93 LCI 335i and 335i xDrive
  • F30, F31, F34 320i, 328i, 335i and 335i xDrive, Hybrid 3
• 4 Series
  • F33, F36 435i and 435i xDrive
• 5 Series
  • F07 GT and F07 LCI 535i and 535i xDrive
  • F10 and F10 LCI 520i, 528i and 535i including xDrive, Hybrid 5
  • F11 520i, 528i and 535i including xDrive
• 6 Series
  • F06, F12, F13 including LCI 640i and 640i xDrive
• 7 Series
  • F01 LCI 740i and Hybrid 7
  • F02 LCI 740Li and 740Li xDrive, Hybrid 7L
• X Series
  • X1 E84 20i, 28i and 35i including xDrive
  • X3 F25 20i, 28i and 35i including xDrive
  • X5 E70 LCI 35i and 40i including xDrive
  • X5 F15 35i and 35i xDrive
  • X6 E71 35i and 40i including xDrive
• Z Series
  • Z4 E89 18i, 20i and 28i

Not sure if it suits your vehicle? Add your UK registration or the last 7 of your VIN at checkout and we will confirm compatibility before dispatch.

Installation and coding

• For balanced fuelling, replace all six on N55 and all four on N20 where applicable.
• After installation, the injector must be coded to the ECU for correct operation.
• Professional fitting available with MJ Modifications in Warwickshire, request a quote at info@mjmodifications.co.uk.

Part details

• Part number: 13647597870
• Manufacturer: BMW, original equipment component for N20 and N55

Warranty

Two years manufacturer warranty for UK customers and one year manufacturer warranty for international customers when a VIN is provided at checkout on compatible vehicles.

Why buy from MJ Modifications

• Genuine BMW parts for perfect fit, reliability and performance
• Hands on experience with N20 and N55 platforms on road and track
• Excellent feedback from enthusiasts who have eliminated misfires and regained factory smoothness
• Expert advice, compatibility verification and professional installation on request

Restore the response and refinement your BMW deserves with a factory injector for N20 or N55. Order now and enjoy smooth idle, strong torque and dependable fuelling across the rev range.