Bosch OEM Bosch Fuel Injector Replacement Kit - BMW B46/B48 2.0L (Gen1 B46A) bb48afirKT

OEM Bosch Fuel Injector Replacement Kit - BMW B46/B48 2.0L (Gen1 B46A)

This Fuel Injector Replacement Kit includes new injectors and hardware to service your fuel injection system, eliminating rough idle, low power, and check engine lights due to faulty fuel injectors.
Bosch Bosch
T#: 50031891 | Part#: bb48afirKT
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Bosch OEM Bosch Fuel Injector Replacement Kit - BMW B46/B48 2.0L (Gen1 B46A) bb48afirKT
OEM Bosch Fuel Injector Replacement Kit - BMW B46/B48 2.0L (Gen1 B46A)
$356.99

The fuel injectors in your BMW are the cornerstone of its high-pressure direct injection (DI) system. Unlike traditional port-injection setups, DI injectors are seated directly within the combustion chamber. This configuration allows for a highly atomized fuel mist and precise timing, but it also subjects the injector tips to extreme thermal loads, high cylinder pressures, and consistent carbon fouling.

Over time, these harsh operating conditions degrade the injector’s internal tolerances and nozzle integrity. This degradation results in compromised spray patterns and inaccurate fuel metering, which can manifest as:

  • Reduced Power Output - Inefficient combustion due to poor atomization
  • Fuel Trim Imbalances - Lean or rich running conditions that can trigger "Check Engine" lights
  • Drivability Issues - Rough idling, erratic acceleration, or persistent misfires
  • Decreased Efficiency - Noticeable drops in fuel economy

When one injector fails, the remaining injectors are likely nearing the end of their service life as well. This Fuel Injector Replacement Kit is designed to provide a complete service to the fuel injection system.

Since BMW classifies the majority of the high-pressure fuel system hardware as single-use (stretch) bolts, reusing old fasteners can lead to improper torque-to-yield specs and potential fuel leaks. To ensure a professional-grade installation, we have bundled the injectors with all the required Genuine BMW hardware.

Kit Components

  • OEM Bosch Fuel Injectors - Direct-replacement units calibrated for factory-spec flow and atomization
  • Genuine BMW Fuel Rail Mounting Bolts -  Critical for maintaining the structural integrity of the high-pressure rail
  • Genuine BMW Injector Bracket Bolts -  Ensures precise injector alignment and seating
  • Genuine BMW High-Pressure Fuel Pump (HPFP) Bolts - Necessary for any service requiring the removal of the high-pressure lines

Prop 65 WarningProp 65 Warning
Qty Description T# Part# Lifetime
2 Genuine BMW High Pressure Fuel Pump Mounting Bolt - M6X25-U1 - BMW N20 N55 B38 B48 B58 T#207714 13517632572~OEM YES
4 Genuine BMW Fuel Injection Fuel Rail Bolt - BM6X70-8.8 - BMW MINI B38 B46 B48 B58 (Gen 1 2 & 3) T#525919 13538661715 YES
8 Genuine BMW Fuel Injector Bracket Screw - 5X30-10.9 - BMW MINI B38 B46 B48 B58 (Gen 1 2 & 3) T#541393 13538661716 YES
4 Fuel Injector - Priced Each T#590868 13538625396~BOS YES

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Lifetime Replacement

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Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

MAKE MODEL SUBMODEL ENGINE Special Fitment Notes
BMW F22 230i B46 2.0L Use vehicle selector to confirm fitment
BMW F22 230i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F23 230i B46 2.0L Use vehicle selector to confirm fitment
BMW F23 230i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F30 330e iPerformance B48 2.0L Use vehicle selector to confirm fitment
BMW F30 330i B48 2.0L Use vehicle selector to confirm fitment
BMW F30 330i xDrive B48 2.0L Use vehicle selector to confirm fitment
BMW F31 330i B48 2.0L Use vehicle selector to confirm fitment
BMW F32 430i B46 2.0L Use vehicle selector to confirm fitment
BMW F32 430i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F33 430i B46 2.0L Use vehicle selector to confirm fitment
BMW F33 430i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F34 330i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F36 430i B46 2.0L Use vehicle selector to confirm fitment
BMW F36 430i xDrive B46 2.0L Use vehicle selector to confirm fitment
BMW F39 X2 sDrive28i B48 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW F39 X2 xDrive28i B48 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW F48 X1 sDrive28i B46 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW F48 X1 xDrive28i B46 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G01 X3 sDrive30i B46 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G01 X3 xDrive30i B46 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G02 X4 xDrive30i B46 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G30 530e B48 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G30 530e xDrive B48 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G30 530i B48 2.0L For vehicles with the earlier Gen1 B46 engine only
BMW G30 530i xDrive B48 2.0L For vehicles with the earlier Gen1 B46 engine only
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.

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