Precision Raceworks Boost Referenced Pump Activation Harness for BMW N54/N55 (Plug & Play, 13 PSI Hobbs Switch, Aux Fuel Pump) – Fits 135i 335i 435i M235i M2 M3 M4 1M – Part 201-0049

BMW N54 N55 Pressure‑Activated Fuel Pump Wiring Loom by Precision Raceworks

Part number: 201-0049

Keep your tuned BMW fueling strong under boost with this Precision Raceworks pressure‑switch controlled fuel pump loom. It is a direct‑fit solution for triggering a secondary low pressure pump exactly when the engine sees positive manifold pressure. No cutting, no crimping, no headaches. Just dependable fuel delivery for road, track and fast‑road builds.

Built with proper automotive hardware and OEM‑style connectors, this harness is the go‑to choice for tuners who want clean install quality and rock solid activation at the same boost threshold every time. We run this kit on our own cars and our customers love the consistent results and tidy factory look.

Why enthusiasts choose this loom

• Direct‑fit connectors for a factory‑finish install. No splicing required
• 10 gauge oxygen‑free copper cable for maximum current capacity to your additional in‑tank pump
• Pre‑set 13 psi boost pressure switch for precise and repeatable triggering
• Automotive‑grade switch is safe in oil and air, proven to live in engine bay temperatures
• Pre‑installed 30 amp fuse for built‑in circuit protection
• Trusted by tuners and pump suppliers worldwide for N54 and N55 fuel system control

What it does

Under load, the pressure switch senses manifold boost and closes the circuit to power your secondary low pressure fuel pump. That keeps fuel pressure stable when it matters, supporting higher power levels, hybrid turbo upgrades and spirited use. The install is fully reversible and integrates neatly with the factory harness.

Key details

• Activation method: boost pressure switch
• Set point: 13 psi
• Wiring: 10 gauge oxygen‑free copper
• Connector style: OEM‑type quick connect
• Fuse: 30 amp pre‑fitted
• Approximate weight: 2.1 lbs
• Manufacturer: Precision Raceworks
• Part number: 201-0049

Compatibility

Designed for turbocharged BMW platforms using the N54 or N55 engine. Common applications include:

• 1 Series E8x 128i, 135i, 135is. 1M Coupe E82
• 2 Series F2x 228i, M235i. M2 F87 including M2 Competition
• 3 Series E9x 323i, 325i, 328i, 330i, 335i, 335is, xDrive variants
• 3 Series F3x 320i, 328i, 335i, xDrive variants
• 4 Series F3x 428i, 435i
• M3 E9x and F80. M4 F8x
• X1 E84

Real‑world reliability

Unlike generic pool or spa switches, the included automotive pressure switch is designed for engine environments and can handle exposure to oil and heat. This equals years of service on hard‑driven, boost‑raised BMWs. Feedback from our workshop and customers is consistently positive. Fitment is straightforward and the performance is repeatable.

Fitting and support

DIY‑friendly with direct‑fit connectors. If you prefer professional fitting, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Compatibility check

We verify fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm suitability for your vehicle.

Search keywords to help you find this part

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