O2 Oxygen Sensor Upstream Downstream for Audi A4 A5 Q5 A6 (2009-2017) 2.0L

Direct-Fit O2 Oxygen Sensor Kit for 2009-2017 Audi A4,A5,Q5,A6 (B8/C7)

What it Does: This matched upstream and downstream O2 sensor kit monitors exhaust oxygen on B8 / C7 Audi EA888 2.0L TFSI engines for accurate air-fuel control.

The Stock Audi A4,A5,Q5,A6 Failure

Factory oxygen sensors on the B8 / B8.5 / C7 chassis equipped with the EA888 2.0L TFSI engine suffer from extreme exhaust heat soak and direct-injection carbon fouling. Over time, oil vapor and soot glaze the zirconia element while internal heater circuits fatigue, slowing lambda voltage response. This calibration drift triggers P0130, P0133, or P0136 fault codes and forces rich open-loop fueling.

Common Symptoms of a Failing OEM Sensor

• Check Engine Light / DTCs: Stored P0133, P0140, or P0420 codes caused by sluggish sensor switching.
• Unstable Fuel Trims: Erratic air-fuel feedback creates rough idle and hesitation under boost.
• Failed Emissions / High MPG: Open-loop enrichment raises tailpipe emissions and fuel consumption.

The Direct-Fit Oxygen Sensor Solution

Replacing both sensors together using units matching 350-35064, ES11083, and 250-24672 restores factory lambda feedback across the exhaust system. Each sensor utilizes a stainless steel housing, laser-welded protective shield, and fast-acting planar zirconia element calibrated for EA888 2.0L TFSI thermal loads. Pre-terminated OEM connectors and exact harness lengths allow direct plug-and-play installation with factory electrical resistance and no wire splicing.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• Audi A4 (2009-2016) 2.0L
• Audi A5 (2010-2017) 2.0L
• Audi Q5 (2011-2017) 2.0L
• Audi A6 (2012-2015) 2.0L

Frequently Asked Questions & Fitment Warnings

Does this fit the B8 / C7 A4,A5,Q5,A6?

Yes. Fits listed 2009-2017 Audi A4,A5,Q5,A6 models with the EA888 2.0L TFSI engine. Excludes V6, TDI, and S/RS trims; confirm 2.0L engine first.

Will this clear P0130, P0133, or P0140 codes?

Yes. Matching 350-35064, ES11083, and 250-24672 restores valid lambda feedback, clearing sensor-induced P0130/P0133/P0140 faults after an ECU drive cycle.

Are OEM connectors included for direct installation?

Yes. Factory connectors install plug-and-play; torque to spec and keep anti-seize off the tip.

The Audi Precision Standard

Engineered for Euro emissions precision and EA888 2.0L TFSI ECU calibration, this matched kit restores fuel trim accuracy. Expect reliable closed-loop operation and CEL-free drivability.