Bosch B58TU High Pressure Fuel Pump Upgrade - M140i / M240i / 340i / 440i

Unlock reliable fuelling for your tuned BMW B58

This genuine Bosch rail pump is the sought-after B58TU HPFP retrofit for early B58 cars, delivering the fuel system headroom your build needs without hassle. It is a straight swap on B58 Gen 1 engines with factory lines and connector retained, so there is no need for a wiring loom extension or additional hardware.

Part number: 0261520520R

Why enthusiasts choose this pump

• Plug-and-play on B58 Gen 1. Direct replacement with OEM fit and finish, no harness extensions or hydraulic modifications.
• Genuine Bosch quality for OE-level durability and long service intervals.
• Up to 350 bar rail pressure capability across the rev range, roughly 75 percent higher than the factory specification for strong, stable fuelling when tuned.
• 10 percent larger plunger for more fuel per stroke and improved volume delivery under load.
• Tighter internal tolerances to improve pumping efficiency and reduce heat generation.
• Ideal when a remap, intake, exhaust, or turbo hardware pushes the stock pump beyond its comfort zone. Perfect for builds targeting more than a basic Stage 1 tune.

We have installed and used this unit on multiple B58 customer cars and in-house projects. Feedback is consistently positive, with smoother power delivery and sustained fuel pressure at higher boost and rpm. If you are planning fast-road or track use, this is a proven fuelling solution.

Compatible applications

Designed for BMW B series straight-six engines produced approximately 2015 to 2019 and used across a wide range of BMW and select Toyota applications. Fits the following BMW platforms using the early B58:

• 1 Series F20 F21 M140i, including xDrive
• 2 Series F22 F23 M240i, including xDrive
• 3 Series F30 F31 340i, including xDrive
• 3 Series Gran Turismo F34 340i, including xDrive
• 4 Series F32 F33 F36 440i, including xDrive
• 5 Series G30 G31 540i, including xDrive
• 6 Series Gran Turismo G32 640i, including xDrive
• X3 G01 M40i
• X4 G02 M40i

Unsure about fitment for your specific chassis or build plan? Get in touch and we will confirm compatibility before you buy.

Fitting and support

Professional fitting recommended. MJ Modifications can supply and install at our Warwickshire workshop. For a fitting quote, email info@mjmodifications.co.uk.

Search-friendly notes

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