Bosch 0261520520R (0520R) B58TU HPFP Upgrade – BMW B58 Gen 1 High Pressure Fuel Pump/Injection Rail Pump, Plug & Play Drop-In for M140i M240i 340i 440i 540i 640i X3 M40i X4 M40i (F20 F21 F22 F23 F30 F31 F32 F33 F36 G30 G31 G32 G01 G02)

Uprated Bosch Fuel Injection Pump for BMW B58 Gen 1 - Direct replacement for M140i, M240i, 340i, 440i, 540i, 640i, X3 M40i, X4 M40i

Unlock dependable fueling on your turbocharged straight-six with the genuine Bosch 0261520520R B58TU pump. This drop-in, bolt-on upgrade is a factory-quality solution that increases fuel system headroom for calibrated and remapped cars while retaining OEM refinement. No wiring harness extension required on first-generation B58 applications and no additional plumbing changes needed. If you want stable rail pressure under heavy load and consistent performance on spirited road use or track days, this is the go-to choice.

Why enthusiasts choose this Bosch unit

• Direct replacement for B58 Gen 1 - no loom extension or extra lines on compatible cars
• OEM-grade Bosch construction - reliable, quiet operation and factory-like drivability
• Improved fuel flow at higher demand compared to the standard pump
• Ideal for ECU tunes, Stage upgrades and performance calibrations that need extra fueling headroom
• Consistent rail pressure for smoother throttle response and repeatable performance
• Tried and tested by our team and customers with excellent real-world feedback

Product details

• Part number: Bosch 0261520520R
• Type: High pressure fuel rail pump for first-generation B58 engines
• Fitment notes: Direct-fit on B58 Gen 1 without wiring changes or hydraulic modifications
• Applications: BMW B-series petrol engines from approximately 2015 to 2019 plus select Toyota models using the B58 platform

Vehicle compatibility - BMW B58 Gen 1

Direct-fit for the following models and chassis codes:

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

If you are unsure, contact us and we will confirm suitability before you order.

Installation

Professional fitting is recommended. MJ Modifications in Warwickshire offers in-house installation with care and attention to detail. For a fitting quote or to book our workshop, email info@mjmodifications.co.uk.

Compatibility check before dispatch

We verify fitment prior to shipping. Provide your UK registration number or the last 7 digits of your VIN at checkout so we can confirm compatibility for your vehicle.

Warranty

Manufacturer warranty: 2 years for UK customers and 1 year for international customers when a valid VIN is provided at checkout on compatible vehicles.

Trusted performance

We have supplied and installed this Bosch pump on numerous B58-powered cars. Owners consistently report stronger fueling stability on tuned setups, smooth idle quality and OEM-level refinement.

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