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Fuel-It

Fuel-It FI041 15 PSI Boost Pressure Switch - Hobbs-Style Turbo Boost Switch, Boost-Referenced LPFP Trigger/Relay/Controller for Auxiliary/Secondary Fuel Pump - BMW N54/N55 E82 E88 E90 E91 E92 E93 E84 135i 335i 1M - Stage 3/4 Upgrade

Fuel-It FI041 15 PSI Boost Pressure Switch - Hobbs-Style Turbo Boost Switch, Boost-Referenced LPFP Trigger/Relay/Controller for Auxiliary/Secondary Fuel Pump - BMW N54/N55 E82 E88 E90 E91 E92 E93 E84 135i 335i 1M - Stage 3/4 Upgrade

£79.20
£79.20
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

FI041 15 psi Boost Pressure Switch for BMW N54 and N55 - reliable auxiliary LPFP activation under load

Keep your uprated fuel system in step with boost. The Fuel-It FI041 15 psi boost-referenced pressure switch engages your auxiliary low pressure fuel pump exactly when cylinder demand rises, helping tuned turbo BMWs maintain consistent supply on road, strip and track. Perfect for Stage III and Stage IV LPFP setups on the N54 and N55, this Hobbs-style switch adds simple, predictable control to your fuelling strategy.

We run this on our own builds and customer cars and it just works. The fixed 15 psi set point gives smooth, repeatable pump activation so you get stable fuel pressure and confident power delivery at higher boost targets. A proven, no-nonsense solution for E-chassis performance BMWs that need dependable auxiliary pump control.

Key reasons to choose FI041

  • 15 psi boost-referenced activation for your secondary low pressure pump
  • Built for upgraded LPFP systems on N54 and N55 turbo applications
  • Supports tuned and hybrid-turbo builds where extra flow is essential
  • Crisp, consistent trigger point for seamless fuelling under acceleration
  • Trusted Fuel-It component that integrates cleanly into performance fuel systems

Vehicle applications

Designed for BMW E-chassis models with N54 or N55 petrol engines, including:

  • 1 Series E82 Coupe and E88 Convertible - 135i
  • 3 Series E90 Saloon, E91 Touring, E92 Coupe, E93 Convertible - 335i
  • 1 Series M Coupe - 1M
  • X1 E84 with N54 or N55

Ideal for enthusiasts searching for terms such as boost pressure switch, turbo boost switch 15 psi, auxiliary fuel pump activator, LPFP trigger switch, boost referenced fuel pump switch, fuel pump relay trigger, BMW E82 E88 E90 E91 E92 E93 fuel upgrade, N54 N55 fuel control and Stage 3 Stage 4 LPFP controller.

Fitment check

Add your UK registration or the last 7 digits of your VIN at checkout and we will confirm compatibility before dispatch.

Professional installation

Want it fitted correctly the first time? Book expert installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Part number

FI041

Brand

Fuel-It

Warranty

Fuel-It Limited Warranty.

Upgrade your fuelling control today with the Fuel-It FI041 15 psi boost pressure switch and enjoy predictable, confident performance every time you lean on the throttle.

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