Walker 250-24955 Oxygen Sensor

Walker OE Oxygen Sensor for Audi, Porsche, Volkswagen

Walker Products OE 250-24955 is a heated oxygen sensor built as a direct-fit replacement for specific downstream and upstream applications. It is engineered for vehicles that rely on accurate exhaust feedback to manage fuel delivery, emissions, and diagnostic monitoring.

For Audi A8 Quattro, RS7, S6, S7, and S8 applications, as well as Porsche Cayenne and Volkswagen Passat, CC, Tiguan, and Saveiro coverage, this sensor is matched to the listed position and ECU feedback requirements. Walker Products OE focuses on application-specific fitment, including connector style, thread size, and harness length.

• Heated oxygen sensor for precise exhaust monitoring
• Specific-fit design for the listed vehicle positions
• 4-wire configuration with 22-gauge wiring
• 24.13 in. wiring harness length and 27.68 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Male connector with radiused polygon shape

Product Details

Walker Products OE 250-24955 is part of the Walker Products OE line, which is built around original-equipment-style replacement sensors for modern engine management systems. This oxygen sensor is intended for downstream right, downstream left, upstream, and downstream positions depending on the vehicle listing, including 2015-2018 Audi A8 Quattro, 2015-2018 Audi RS7, 2015-2018 Audi S6, 2015-2018 Audi S7, and 2015-2018 Audi S8. It also covers Porsche Cayenne and Volkswagen applications such as Passat, CC, Tiguan, and Saveiro. The part number 250-24955 is used where the ECU expects the correct sensor signal for emissions control and fuel-trim management.

This part cross-references no listed aftermarket part numbers in the provided data.

Common Issues This Sensor Can Address

• Check engine light or MIL illumination tied to oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor signal
• Stored ECU fault codes related to the affected sensor circuit

Installation Notes and Tips

Confirm the exact year, make, model, and sensor position before ordering. For 250-24955, verify whether your vehicle calls for downstream right, downstream left, upstream, or downstream placement. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect readings. Match the threaded mounting and connector style to the original unit for proper installation.

Quality Assurance

Walker Products has supplied engine management and oxygen sensor components since 1946 and manufactures OE-style replacement parts for specific applications. The brand operates with ISO9001/TS 16949 certification and builds each part number around the required vehicle fitment and ECU feedback profile.