MAP sensor Smart FORFOUR (454) 2004–2006 1.5 CDI (454.001) OM 639.939 A0041538428

Part type

MAP sensor

Also known as

Manifold absolute pressure sensor

Manufacturer

Smart

Model

FORFOUR (454)

Years

2004–2006

Engine

1.5 CDI (454.001)

Engine code

OM 639.939

SKU

81C3758D

OEM

A0041538428

12233209

This manifold absolute pressure sensor was removed from a Smart Forfour 454 with the 1.5 CDI engine. The MAP sensor measures intake manifold pressure to help the engine control unit optimize fuel injection and ignition timing. Match the OEM codes (A0041538428, 12233209) against your original unit before ordering to confirm fitment.