MAN TGA/TGS/TGX Air Pressure Sensor Switch 81.27421-0251 Euro 5/6 4047755395612 Brake Sensors & Switches

Description:
Genuine MAN air / brake pressure sensor switch, part number 81.27421-0251 / 81274210251, used in the compressed air and braking system on MAN heavy commercial vehicles. This sensor monitors system air pressure (typical range 0–16 bar) and provides an electrical signal to the vehicle ECU or warning circuit to protect the braking system and air reservoirs. It is widely used across MAN TGA, TGL, TGM, TGS and TGX platforms in Euro 3, Euro 4, Euro 5 and early Euro 6 applications.

The unit features an M12x1.5 threaded metal body with 30 mm spanner hex, compact design of approx. 48.5 mm height and a 4‑pin electrical connector (red plug) suited to 24V commercial vehicle systems. This listing includes the original angled adaptor fitting and short harness section as photographed, making installation quicker if you are replacing a like‑for‑like sensor. Cross‑reference numbers include MAN 81274210230, 81274210246, 81274210262, 81274216048 and aftermarket equivalents DT 3.70010, Febi Bilstein 38457, Berg Kraft BK9000246, Trucktec 05.42.100, Casals 65110, Stellox 88-21820-SX, Imex IMX81274210251 and Starkmeister S11.2083.

Before removal the sensor was installed on a working vehicle and function tested in the air system; it responded correctly to pressure changes and did not show leakage at the threaded interface. After dismantling the part has been visually inspected and lightly cleaned, but traces of previous use such as oxidation on the metal housing and marks on the hex remain. Electrical pins and connector locking features are intact. This item is supplied as a used original MAN component, ideal as a direct replacement for a failed or intermittent air pressure sensor.

Compatibility should cover most MAN TGA, TGL, TGM, TGS and TGX trucks built from around 2001 onwards that use this style of 0–16 bar air pressure sensor in the brake/air system. However, please match the OE number (81.27421-0251 / 81274210251) and plug style with your old unit or check with your MAN dealer or workshop before ordering. Installation usually requires depressurising the air circuit, unscrewing the old sensor, fitting a new sealing washer or thread seal if specified by the manufacturer, and reconnecting the 4‑pin connector. No coding is typically required, but on some vehicles a fault memory reset may be needed after replacement.

All our used commercial vehicle parts are sourced from running trucks and are tested for basic function prior to dismantling where possible. This genuine MAN air pressure sensor is sold with a 3‑month warranty for peace of mind.

Shipping & Returns:
We ship across UK/EU with tracked services. Returns accepted within 30 days; buyer pays return postage. Please inspect upon arrival and message us with any concerns.

Why Buy From Us:
Genuine part, 3-month warranty, fast dispatch, secure packaging.