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A lambda sensor, also called an oxygen probe, measures the oxygen content in the exhaust so the engine control unit can correct the air-fuel mixture in real time. On Mercedes-Benz vehicles, it is installed in the exhaust system — typically before the catalytic converter, and on many models also after it. Because it works directly in the hot exhaust stream, this sensor is exposed to extreme temperatures, rapid heat cycles, vibration, soot, oil ash, and fuel residue.
When a lambda sensor begins to fail, the signs are often noticeable even without diagnostic equipment. A Mercedes may start using more fuel than usual, idle unevenly when warm, hesitate during acceleration, or feel less responsive at steady speed. In some cases, the check engine light appears, the exhaust smell becomes stronger, or the car struggles to pass emissions testing. If the rear sensor is affected, the vehicle may seem to run normally but keep triggering a warning light related to catalyst efficiency.
Choosing a genuine used OEM Mercedes-Benz lambda sensor is a practical alternative to aftermarket copies, which often have inconsistent calibration, connector differences, or short service life. An original factory part offers correct fit, proper signal range, and OEM reliability at a much lower cost than a new dealer part. At imcar.com.ua, every sensor is matched precisely by VIN/chassis number before shipping, and all parts are packed carefully for safe international delivery. Order with confidence.
When a lambda sensor begins to fail, the signs are often noticeable even without diagnostic equipment. A Mercedes may start using more fuel than usual, idle unevenly when warm, hesitate during acceleration, or feel less responsive at steady speed. In some cases, the check engine light appears, the exhaust smell becomes stronger, or the car struggles to pass emissions testing. If the rear sensor is affected, the vehicle may seem to run normally but keep triggering a warning light related to catalyst efficiency.
Choosing a genuine used OEM Mercedes-Benz lambda sensor is a practical alternative to aftermarket copies, which often have inconsistent calibration, connector differences, or short service life. An original factory part offers correct fit, proper signal range, and OEM reliability at a much lower cost than a new dealer part. At imcar.com.ua, every sensor is matched precisely by VIN/chassis number before shipping, and all parts are packed carefully for safe international delivery. Order with confidence.