NGK 25657 Oxygen Sensor Direct Fit OE Type 4-Wire O2 Sensor

The NGK 25657 oxygen sensor (also called an O2 sensor or air-fuel ratio sensor) is a direct-fit, OE-type replacement from NTK, the NGK group's sensor brand. It measures the oxygen content of the exhaust and sends that feedback to the engine control unit. The ECU uses it to manage the air-fuel mixture and to monitor emissions system performance.

Key Features:

• Direct-fit design built to OE standards with close tolerances
• 4-wire sensor with integrated heater for quick activation and reduced cold-start emissions
• Sensing element made with NTK technical ceramic and a protective coating
• Corrosion-resistant housing that protects the ceramic element from silicone and lead poisoning
• Porous PTFE filter lets atmospheric oxygen in while keeping water and engine contaminants out
• 18 mm thread diameter
• Wiring harness length of approximately 31.5 inches
• OE-specified, water-resistant connector

Cross-References: OEM numbers 022906262AP, 022906262CC, 06A906262CK, 079906265A, 07L906265F, 1K0998262S, 1K0998262T and 95860617400.

A worn oxygen sensor can cause poor fuel economy, rough running, a check-engine light and failed emissions tests. Replacing it with this sensor helps restore proper closed-loop fuel control.