O2 Oxygen Sensor Upstream Downstream for BMW 3 Series (2007-2013) 3.0L

Direct-Fit Oxygen Sensor Kit for 2007-2013 BMW 3 Series (E90 / E92)

What it Does: The complete upstream and downstream O2 sensor kit monitors exhaust gas oxygen content across both cylinder banks on the 2007-2013 BMW 3 Series to maintain stoichiometric fuel trims and eliminate Check Engine Lights.

The Stock BMW 3 Series Sensor Degradation

Factory lambda sensors on E90, E91, E92, and E93 chassis degrade significantly over 80,000 to 100,000 miles. Sustained exposure to high exhaust gas temperatures, oil vapor, and carbon deposits contaminates the internal porous ceramic element. This leads to lazy signal response, incorrect fuel adaptation trims in the N52 and N54 engine management systems, reduced fuel economy, catalytic converter overheating, and persistent DTC fault codes like 2C31 or 2C32.

The Engineering Solution

Engineered to exact OEM operational tolerances, these replacement sensors feature robust 310S stainless steel outer shells, fast-acting internal ceramic heater circuits, and dual-layer protective shielding. The pre-greased, anti-seize coated threads and direct-fit weather-pack harness connectors eliminate the need for wire splicing or terminal repinning, delivering stable micro-voltage signals to the DME to optimize closed-loop combustion efficiency.

What's Included

• 2x Upstream Oxygen Sensors
• 2x Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2007-2013 BMW 328i / 328xi 3.0L (E90 / E91 / E92 / E93)
• 2007-2013 BMW 335i / 335xi / 335is 3.0L (E90 / E92 / E93)

Frequently Asked Questions & Fitment Warnings

Does this fit the E90 3 Series?

Yes, this is a direct fit for the 2007-2013 BMW 3 Series equipped with the 3.0L inline-six engine (confirm your specific production split and sub-model wiring length before purchase).

Do I need to reset adaptations after installation?

Clearing stored trouble codes and executing an adaptation reset via an OBD-II diagnostic scan tool is strongly recommended to recalibrate the DME closed-loop AFR values immediately.

The BMW Precision Standard

Euro direct-injection and Valvetronic engines require tight sensor feedback parameters to maintain proper stoichiometry, prevent catalyst glaze, and ensure completely CEL-free daily driving.