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BMW fuel system kits provide a comprehensive solution for maintaining and upgrading the fuel delivery system, ensuring optimal engine performance and efficiency. Over time, fuel pumps, injectors, filters, and pressure regulators can wear out, leading to poor fuel economy, hard starts, misfires, and engine hesitation. Common problems include clogged fuel injectors, failing fuel pumps, and fuel pressure inconsistencies, which can result in rough idling and reduced power. Upgrading or replacing worn components with a complete BMW fuel system kit restores proper fuel flow, enhances throttle response, and improves overall drivability. Our selection of OEM and high-performance BMW fuel system kits includes everything needed for a reliable fuel system refresh, ensuring a precise fit and long-lasting durability for a wide range of BMW models.

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JB4PRO Flex Fuel Add On Harness - B58/S58

T#:49822568

Part#: JB4PB58FFAOH

In Stock

$ 49.00 USD

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$ 49.00 USD

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Take your B58 or S58 build further with the JB4PRO Flex Fuel Add-On Harness—a simple, plug-and-play way to add an ethanol sensor and optional fuel pressure sensor to your JB4PRO setup. Keep your install clean, your wiring organized, and your tune dialed to match every fuel blend in the tank. Why it matters: Plug & Play: Connects directly to your JB4PRO—no cutting or splicing required. Sensor Ready: Supports ethanol and fuel pressure sensors for precise, real-time fueling adjustments. Clean, Safe Installation: Includes a 12 V adapter and inline fuse for hassle-free integration. How it works: This harness links your JB4PRO tuner to your flex fuel hardware. It’s not a complete flex fuel kit—you still need a compatible ethanol sensor—but it gives your JB4PRO the accurate readings it needs to adjust timing, boost, and fueling for E30, E50, or E85 blends.

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Genuine BMW Fuel Injector Replacement Kit - BMW B48 2.0L (Gen2 B46D B...

T#:51356036

Part#: B48G2FIRKT

Ships in 5 Business Days

$ 1,477.99

This product was last offered at the strikethrough price on
08-07-2026

$ 1,471.99 USD

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$ 1,471.99 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW S58 3.0L

T#:51426464

Part#: S58FIRKT

Ships in 5 Business Days

$ 2,409.99

This product was last offered at the strikethrough price on
08-07-2026

$ 2,400.99 USD

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$ 2,400.99 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B48E 2.0L

T#:51426470

Part#: B48EFIRKT

Ships in 5 Business Days

$ 1,605.99

This product was last offered at the strikethrough price on
08-07-2026

$ 1,599.00 USD

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$ 1,599.00 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B46/B48 2.0L (Gen1 B4...

T#:50031890

Part#: B48AFIRKT

Ships in 5 Business Days

$ 1,530.99

This product was last offered at the strikethrough price on
08-07-2026

$ 1,524.99 USD

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$ 1,524.99 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B48 2.0L (Gen3 B48P B...

T#:51356077

Part#: B48G3FIRKT

Ships in 5 Business Days

$ 1,605.99

This product was last offered at the strikethrough price on
08-07-2026

$ 1,599.00 USD

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Qty

$ 1,599.00 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B58 3.0L (Gen2 B58C B...

T#:51356037

Part#: B58G2FIRKT

Ships in 5 Business Days

$ 2,218.99

This product was last offered at the strikethrough price on
08-07-2026

$ 2,209.99 USD

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$ 2,209.99 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B58 3.0L (Gen1 B58 / ...

T#:50031892

Part#: B58AFIRKT

Ships in 5 Business Days

$ 2,297.99

This product was last offered at the strikethrough price on
08-07-2026

$ 2,288.99 USD

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Qty

$ 2,288.99 USD

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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.

Genuine BMW Fuel Injector Replacement Kit - BMW B58 3.0L (Gen3 B58N B...

T#:51356078

Part#: B58G3FIRKT

Ships in 5 Business Days

$ 2,409.99

This product was last offered at the strikethrough price on
08-07-2026

$ 2,400.99 USD

Add to Wish List

Qty

$ 2,400.99 USD

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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.

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