If a back light is not required then the gauge can be operated with no electrical connection at all however the gauge is supplied with a white LED back light and illuminated needle which require a 12 volt feed.
Stack Turbo Boost Pressure Gauge - Mechanical (Black Dial, -30inHg To 30 PSI)
Stack Mechanical Turbo Boost Pressure Gauge -1.0 to +2.0 Bar Black 52mm ST3111
Stack Mechanical Turbo Boost Pressure Gauge -30 to +30 Psi Black Face 52mm 3112
FOR Mini R55 R56 R57 R58 R59 R60 R61 Cooper S Turbo Boost Pressure Control Valve
For Mercedes Sprinter B906 OM651 2006-ON Turbo Boost Pressure Sensor A0091533128
OEM PEUGEOT CITROEN FORD 1.6 HDi 2.0 HDi TURBO BOOST PRESSURE SOLENOID VALVE
