NGK direct-fit oxygen sensor for 2008–2010 BMW 535i. Oxygen sensors provide continuous closed-loop feedback to the engine control unit, helping maintain engine performance, improve fuel efficiency and reduce emissions by managing the air–fuel ratio and alerting OBDII systems to fuel delivery or catalytic converter issues. This unit features an advanced ceramic element with a 3-stage contaminant-resistant plasma-jet and deposit-trap overcoat to protect against element poisoning.
NGK BMW 535i 2010-2008 Direct Fit Oxygen Sensor