P3 Analog Boost Gauge for BMW Z4 E85/E86 (2002-2008) - Boost/Vacuum, Battery Voltage, 0-5V Sensor Inputs - OEM-Style Integrated Display

P3cars Analogue Vent Display for BMW Z4 E85 E86 02-08

A stealth, vent-mounted performance readout designed for first-generation BMW Z4 owners who want factory-fit styling with precise data. This P3cars analogue kit gives you live manifold pressure, vacuum level and charging system volts, plus two auxiliary 0-5V channels for add-on senders like oil pressure, fuel rail pressure or wideband AFR. It looks OEM in the cabin, feels premium and delivers the numbers you need when you are on boost or cruising.

We run this setup in-house and have installed it for customers who love the clean integration, responsiveness and rock-solid reliability. If you are building a turbo or supercharged E85 roadster or E86 coupe, this is the neat, no-clutter solution that keeps critical information right in your line of sight.

Main functions

• Manifold pressure and vacuum via the included pressure transducer, connected with the dedicated plug - wiring colours yellow, purple, black. Boost reference adapter not included.
• Aux channel 1 - brown wire - accepts any linear 0 to 5 volt signal, ideal for oil pressure sender, fuel pressure sensor or lambda controller output.
• Aux channel 2 - blue wire - accepts any linear 0 to 5 volt signal for additional monitoring.
• System volts - red and black wires - displays battery and alternator voltage for quick health checks.
• Optional auto-dim - green wire - tie into a headlamp feed, then enable in the menu for night-time dimming.

Why enthusiasts choose this setup

• Vent-integrated display that blends with BMW interior trim for a discreet, factory-style finish.
• Fast, accurate manifold pressure and vac feedback for forced-induction builds.
• Two 0-5V auxiliary inputs for expandability - monitor wideband AFR, oil pressure or fuel pressure without extra pods.
• Tested by us and fitted for customers with excellent feedback on clarity and durability.

Installation notes

This is not plug and play. You will need to run a vacuum line to the intake manifold, connect power and ground, and wire any optional 0-5V sensors you want to display. A boost tap is not included.

What you get

• Vent-integrated display unit
• Analog Box control module
• Main harness
• Hard-wire harness
• Analogue pressure sensor for manifold pressure - boost tap not included
• Approximately 5 feet of 5/32 inch O.D. tubing with 5/32 inch I.D. hose at each end
• 3 zip ties
• 2 scotchlok wire taps

Compatibility

BMW Z4 E85 roadster and E86 coupe, model years 2002 to 2008.

Professional fitting

Prefer a hassle-free install with a tidy, factory-looking finish? Book professional fitting with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Why buy from us

We use this P3cars analogue vent display on our own builds and customer vehicles. It delivers precise data, a clean aesthetic and dependable performance. Order with confidence for a sleek instrumentation upgrade that complements your BMW interior while giving you the numbers that matter.

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