NGK 21064 Oxygen Sensor Heated Narrow-Band O2 Sensor 4-Wire M18

The NGK 21064 oxygen sensor (also called an O2 sensor or lambda sensor) is a direct-fit, heated, narrow-band zirconia sensor. It gives the engine computer closed-loop feedback on exhaust oxygen content. The computer uses this feedback to control the air-fuel ratio, which helps maintain engine performance and fuel efficiency and reduces emissions. It also lets the OBD-II system detect problems.

Key Features:

• Heated, narrow-band oxygen sensor with 4 wires and a 4-terminal blade connector
• M18 x 1.5 thread with a 7/8 in (22 mm) wrench size
• Wire harness length of about 15 in (378 mm)
• OE-style water-resistant connector and harness hardware for straightforward installation
• Dual-coated platinum interface and thin ceramic element for fast light-off and response
• 3-stage overcoat helps protect the element from contamination
• Vibration and thermal shock tested during development
• Replaces OE numbers including 12597947, 12598718, 12615904, 12617907, 12618009, 12618010, 12618011 and 12618012

The faster light-off time means the sensor reaches operating temperature sooner, which reduces cold-start emissions. NGK/NTK is a leading original-equipment oxygen sensor supplier.