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BMW Fuel System Parts

Looking for a BMW fuel pump, BMW gas cap or other BMW fuel system related items? You've found the right place. Your BMW fuel delivery system is a critical system, and any failure can rended your BMW dead in the water. Whether your fuel pump has stopped pumping, a fuel injector is clogged or not spraying, or your gas cap is either lost or not properly sealing, we likely have what you are looking for. We stock thousands of BMW fuel system parts so if you don't see what you are looking for, just give us a call.

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JB4PRO Flex Fuel Add On Harness - B58/S58

T#:49822568

Part#: JB4PB58FFAOH

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$ 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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Upgraded Low Pressure Fuel Pump Assembly

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T#:14188788

Part#: R420-0002

Ships in 5 Business Days

Sale - Save 10% $ 1,449.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,304.96 USD

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Sale - Save 10%

$ 1,449.99

This product was last offered at the strikethrough price on
07-31-2026

$ 1,304.96 USD

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As power output increases, the demand for low-pressure fuel pumps increases. This kit includes components to upgrade your low-pressure fuel pump to deliver consistent fuel flow regardless of the amount of fuel inside the tank while increasing tank drawing. Best of all, the modified pump can be properly controlled by the DME and will result in no fault codes. Complete modified fuel pump Increases tank draw Consistent fuel flow Works seamlessly with existing DME For over 35 years, Dinan has been America's premier tuning company, pioneering advancements in BMW modification while retaining a focus on balanced performance that preserves the original character and driving feel that a BMW offers. When you install a Dinan part on your car, know that it's not only carefully developed and tested, but that Dinan stands behind it with a four-year, 50,000-mile warranty. Dinan believes so fully in their “total package” approach that once your car has been fitted with enough of their parts, they celebrate your conversion from stock to Dinan with an exclusive trunk badge, displayed proudly by BMW enthusiasts everywhere.

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BMW Fuel System Parts

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JB4PRO Flex Fuel Add On Harness - B58/S58

Upgraded Low Pressure Fuel Pump Assembly

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