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Expert Recommendation: Replacing all sensors together ensures optimal engine performance and saves you from paying mechanic labor costs twice.
Suitable for 2Pcs O2 Sensor Up/Down
for Chevy Silverado Tahoe GMC Sierra
Replaces OE: 234-4940 234-4974
$35.95
Final:
$34.15
-5% OFF
Order today, estimated delivery:
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- 2-Year Warranty (100% Brand New)
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Check Fitment Below: If your vehicle matches, place your order directly with confidence!
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Sensor Installation Blueprint
👨🔧 Mechanic's Installation Notes:
This is a COMPLETE SET (Upstream & Downstream). O2 sensors wear out at the same rate (typically 80k-100k miles).
Installation: Upstream sensors screw into the exhaust manifold near the engine. Downstream sensors screw into the pipe after the catalytic converter under the car.
Expert Recommendation: Replacing all sensors together ensures optimal engine performance and saves you from paying mechanic labor costs twice.
Automotive-Leader Sensors
Vehicle Compatible
|
Year
|
Make
|
Model
|
|---|---|---|
|
2015-2018
|
Cadillac
|
Escalade
|
|
2014-2017
|
Chevrolet
|
Silverado 1500
|
|
2015-2018
|
Chevrolet
|
Suburban
|
|
2015-2018
|
Chevrolet
|
Tahoe
|
|
2014-2017
|
GMC
|
Sierra 1500
|
|
2015-2018
|
GMC
|
Yukon
|
|
2015-2018
|
GMC
|
Yukon XL
|
Product Specifications
Warranty & Support: 2 Years + Pre-sale Load Test + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
1. Upstream Sensor: 12659516 / 234-4940
2. Downstream Sensor: 12657188 / 234-4974 Full Interchange List: 12659516, 234-4940, 12666612, 21581, F00HL00421, 18187, LSH-25W, 12657188, 234-4974, 12655678, 21075, 12661898, 12643708, F00HL00410, 18054 |
|
Position
|
Upstream: Front, Pre-Catalytic Converter
Downstream: Rear, Post-Catalytic Converter |
|
Key Parameters
|
Common to Both Sensors:
- Sensor Type: Heated - Wire Quantity: 4 Wires - Wire Harness Length: 13.19 IN - Thread Diameter: 0.708 IN (for downstream, implied for upstream) - Fit Type: Specific Downstream Sensor (12657188/234-4974) Additional Specs: - Connector Gender: Male - Mounting Type: Threaded |
Package Content :
2PCS (12659516 Upstream+12657188 Downstream) Oxygen Sensor