P3Cars Analog Gauge - OEM-Style Vent Boost/Vacuum Gauge for BMW 3 Series G3X (G20/G21) 2019+ | 320i 330i M340i 320d 330d xDrive | Battery Voltage & 0-5V Sensor Inputs

Factory-look vent display for BMW 3 Series G20 and G21 that lets you see turbo pressure, vacuum, system voltage and up to two extra 0 to 5 volt sensor signals without cluttering your cabin. P3’s integrated screen replaces a dash air vent for a stealth finish that feels genuinely OEM while giving you vital data at a glance.

Perfect for owners of 2019 onwards BMW saloon and touring models including 320i, 330i, M340i, 320d and 330d, rear wheel drive and xDrive. Ideal for remapped cars, hybrid or upgraded turbos, intercoolers and supporting mods where dependable manifold pressure and auxiliary sensor monitoring matters.

Highlights

• Live manifold pressure and vac readings via an included dedicated analogue pressure sensor for petrol and diesel turbo engines.
• Two universal 0 to 5 volt inputs to display add-on sensors such as oil pressure, fuel pressure, ethanol content sensor output or wideband lambda controller.
• On-screen 12V system voltage to keep tabs on battery and charging health.
• Discreet vent-mounted display that blends into the interior with a genuine factory vibe. No bulky pillar pods or stick-on gauges.
• Optional dimming input for comfortable night driving when your lights are on.
• Proven by our team on customer builds. Clear, fast and reliable feedback that enthusiasts trust.

Readouts and wiring overview

• Analogue boost sensor connection: dedicated plug with yellow, purple and black leads. Boost tap not included.
• Aux input 1: brown wire for any linear 0 to 5 V signal.
• Aux input 2: blue wire for any linear 0 to 5 V signal.
• Voltage display: through red power and black ground conductors.
• Auto-dim trigger: green wire to a lighting circuit, then enable in the menu.

Installation note

This unit is not plug and play. It requires a vacuum or boost reference connection to the engine and hard-wired power and ground. Any additional 0 to 5 V sensors are optional. A boost tap is not supplied.

What you receive

• Vent-integrated P3 display module
• Analogue Box control unit
• Main plug-in loom
• Hard-wire loom
• Analogue pressure sensor
• Approximately 1.5 m of boost tubing with matching hose sections
• Zip ties x3
• Wire taps x2

Compatibility

For BMW 3 Series G-chassis 2019 onwards: G20 saloon and G21 touring including 320i, 330i, M340i, 320d and 330d, rear wheel drive and xDrive. Please check your exact vehicle before ordering.

Why enthusiasts choose this setup

If you are running a tune, hardware upgrades or simply want peace of mind on a daily driver, an integrated vent display keeps critical info front and centre. See turbo pressure behaviour, catch issues early, verify changes after calibration work and keep your cabin looking stock.

Professional fitting

Want a seamless install on your BMW in the Midlands and beyond? MJ Modifications in Warwickshire can fit this for you. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

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Order today for a clean, integrated way to watch turbo pressure, vacuum, voltage and auxiliary sensors on your BMW G20 or G21.