Upgrade your vehicle's performance with the 12639693 & 12639693 O2 Oxygen Sensor, engineered for ISUZU, BUICK, CHEVROLET, GMC, and HUMMER H3/H3T models. These OE-grade sensors ensure precise air-fuel ratio control, enhancing engine efficiency and reducing emissions .
| Parameter | Details |
|---|---|
| OE Numbers | 12639693, 12646200 |
| Compatibility | ISUZU Amigo (1989-1993), BUICK Skylark (1994-1998), CHEVROLET Cavalier (1989-1994), GMC Safari (1985-1990), HUMMER H3/H3T (2006-2010) |
| Voltage | 12V DC |
| Warranty | 12 Months |
✔️ Heater Resistance: 9.6 ±1.5 Ω
✔️ Response Time:<65ms (Lean to Rich)
✔️ Operating Temperature: -40°C to +850°C
✔️ Connector Type: 4-Wire Design with Weatherproof Seal
Symptoms: Check Engine Light (CEL) with codes P0036, P0054, P0141 indicating heater circuit malfunction .
Diagnosis: Worn-out downstream sensor (Bank 1 Sensor 2) near catalytic converter.
Solution: Replacement with OE-equivalent 12639693 sensor restored normal voltage cycling (0.1V-0.9V) and eliminated CEL.
As a leader in engineering machinery parts, heavy truck components, and automotive sensors, we specialize in:
✅ OEM-quality replacements for CAT, Komatsu, Volvo construction equipment
✅ Precision sensors for John Deere, CLAAS agricultural machinery
✅ Global logistics with DHL/FedEx/EMS support
