Mercedes oxygen sensor A4535420500 / 0258027031, precise exhaust monitoring to ensure efficient engine operation.

2016 Smart 1.0L model oxygen sensor, OEM number A4535420500 (compatible with 0258027031), perfectly matches the year’s exhaust emission system. Real-time monitoring of exhaust oxygen content and feedback to the ECU to optimize the air-fuel ratio, guaranteeing efficient engine operation. Installation difficulty is moderate; recommended to be performed by a professional technician, and disconnect the negative battery terminal and clean the installation area beforehand.