APW Warehouse Supplies AP5-20 Oxygen Sensor Upstream O2 Sensor Replacement

The APW Warehouse Supplies AP5-20 is a direct-fit replacement oxygen sensor designed to restore proper air/fuel ratio monitoring to your vehicle's engine management system. This upstream (pre-catalytic converter) O2 sensor delivers accurate exhaust gas readings to the ECU, helping maintain optimal combustion efficiency, fuel economy, and emissions compliance.

Built to meet or exceed OEM specifications, the AP5-20 features a durable stainless steel housing and high-temperature resistant wiring designed to withstand the harsh thermal and chemical environment of the exhaust system. The sensor is pre-calibrated from the factory for a straightforward plug-and-play installation using the original vehicle wiring harness connector.

Key Features:

• Direct OEM replacement — no modifications required
• Stainless steel sensor body for corrosion and heat resistance
• Pre-calibrated for accurate air/fuel mixture feedback
• High-temperature wiring and connector boot included
• Helps restore fuel economy and reduce harmful emissions
• Meets or exceeds original equipment specifications

Replacing a faulty oxygen sensor with the AP5-20 can resolve common symptoms such as a lit Check Engine light (O2 sensor fault codes), poor fuel economy, rough idle, and failed emissions tests. Always consult a vehicle-specific fitment guide to confirm compatibility before installation.