Mercedes-Benz 4-Pin Temperature Sensor Wire Harness Connector – Female OEM

Mercedes-Benz uses 4-pin temperature sensor connectors in applications where a single sensor measures multiple temperature points or where redundant temperature sensing is required for safety-critical systems. This 4-pin female connector is used in Mercedes-Benz temperature sensor harnesses including coolant temperature, exhaust gas temperature (EGT), intake air temperature (IAT), and transmission fluid temperature circuits. The 4-pin configuration allows dual-element sensors (two NTC elements in one housing) or sensor + heater circuits to be served by a single connector. Available bare.

Key Specifications

Why Mercedes-Benz Uses 4-Pin Temperature Connectors

Mercedes-Benz’s engineering philosophy emphasizes redundancy in safety-critical sensor circuits. A 4-pin temperature sensor connector on a Mercedes platform typically serves one of three configurations: (1) a dual-element NTC sensor with two independent temperature measurement circuits for cross-validation, (2) a heated sensor with a separate heater circuit to maintain sensor accuracy in cold conditions, or (3) a sensor with a dedicated shield/ground circuit for EMI protection in high-noise environments near the engine or exhaust. This complexity means that a corroded 4-pin temperature connector can cause multiple simultaneous temperature fault codes, triggering limp mode or emissions system faults.

Installation Steps

1. Disconnect the vehicle battery
2. Allow the engine and exhaust to cool before working near temperature sensors
3. Locate the 4-pin temperature sensor connector on the affected sensor harness
4. Release the locking tab and unplug the original connector
5. Transfer terminals to the new housing
6. Reconnect and clear temperature sensor fault codes with Mercedes XENTRY

Frequently Asked Questions

Q: What Mercedes-Benz models use this 4-pin temperature sensor connector?
A: This connector is used on Mercedes-Benz C-Class (W204/W205), E-Class (W212/W213), S-Class (W221/W222), GLC, GLE, and GLS temperature sensor harnesses. Cross-reference your vehicle’s wiring diagram to confirm fitment.

Q: What fault codes indicate a failed temperature sensor connector?
A: Common codes include P0115–P0118 (coolant temperature sensor), P0545–P0548 (exhaust gas temperature sensor), P0110–P0113 (intake air temperature), and transmission fluid temperature faults on Mercedes XENTRY.

Q: Are terminals included?
A: Yes, terminals are included.

Compatible Applications

• Mercedes-Benz C-Class W204/W205 – Coolant and EGT sensor harness
• Mercedes-Benz E-Class W212/W213 – Dual-element temperature sensor connector
• Mercedes-Benz GLC / GLE / GLS – Transmission fluid temperature circuit