P3 Analog/Analogue Vent-Mounted Boost Gauge for SEAT Leon Mk1 1M (1998-2005) | Stealth OEM-Style Multi-Function Display – Boost/Vacuum, 0–5V Aux Inputs, Battery Voltage | Fits Cupra & Cupra R 1.8T

P3 Analogue Display for SEAT Leon 1M 1998 to 2005

Give your SEAT Leon Mk1 the clean, factory-style engine data you want without cluttering the cabin. This P3 unit delivers a discreet, high-visibility readout that is perfect for turbo builds, fast-road cars and track-day setups. It is a brilliant way to monitor key parameters on a Leon 1M, including Cupra and Cupra R models, with crisp, fast updates and an OEM-like finish.

Why enthusiasts choose this gauge

• Purpose-built for the 1998 to 2005 SEAT Leon 1M platform
• Stealthy, driver-focused display for serious performance monitoring
• Four channels of live data from your engine and 12 V system
• Simple, reliable hard-wired installation for rock-solid signals

Channels and connections

Four available readouts give you the flexibility to watch the essentials on a turbocharged or tuned car:

• Pressure input for turbo pressure and manifold vacuum via dedicated sensor lead
  Wiring colours: yellow, purple, black
  Note: boost tap not included
• Auxiliary input A for any 0 to 5 V linear sender
  Wiring colour: brown
  Ideal for devices such as oil pressure, fuel pressure, wideband output or temperature converters
• Auxiliary input B for any 0 to 5 V linear sender
  Wiring colour: blue
  Perfect for additional monitoring like coolant temp converters, intake temp modules or differential pressure sensors
• Vehicle battery status through the main power feed and earth
  Wiring colours: red and black
  Great for diagnosing charging system health

Auto-dimming for night driving

Plug the green lead into a circuit that becomes live with the headlamps to enable the optional dimming feature. Once activated in the menu, the display gently reduces brightness for a comfortable night-time view.

Installation note

This unit is not a plug-in kit. A vacuum line to the engine is required for pressure readings, and simple hard-wired connections are needed for 12 V+, earth and any optional sensor feeds. If you prefer a professional fit, we can help.

Fitting service

We have installed and used these on customer cars and our own builds with excellent results. For expert installation, contact MJ Modifications in Warwickshire for a quote: info@mjmodifications.co.uk.

Perfect for

• SEAT Leon 1M owners seeking a tidy, integrated performance display
• Cupra and Cupra R turbo setups wanting accurate manifold pressure monitoring
• 1.8T projects that need additional 0 to 5 V sensor visibility without bulky pillar pods

Search-friendly fitment and terms

Compatible with SEAT Leon Mk1 1M models from 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005. Suits turbo builds, remapped cars, 1.8T applications and enthusiasts wanting a vent-style, stealth gauge solution for engine protection and tuning feedback.