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Important: Verify connector shape and pins match your original part.
2-Piece O2 Sensor
Fits Chevy Silverado Tahoe GMC Sierra
Replaces OE: 234-4940, 234-4974
Resolves Symptoms
- Check Engine Light (P0420/P0171)
- Rough Idle & Hesitation
- Poor Fuel Economy (MPG)
- Failed Emissions Inspection
Estimated Delivery
Free
Ordered
Oct 29
Prepared
Oct 29-Oct 30
Delivered
Nov 12-Nov 20
Requires overseas shipment. Upgrade to expedited shipping at checkout if urgent.
2-Year Warranty
🛡️ Quality Coverage: Protects against any manufacturing defects for 2 full years.
🔄 Free Replacement: Brand-new replacement for free if quality issues occur.
30-Day Return & Refund
📦 Free Returns: Zero costs to you if the product has quality issues.
💰 Full Refunds: 100% money-back guarantee within 30 days for defective items.
5-Step Fitment Guide
- Check OE: Find original part no. & plug.
- Compare Photos: Match plug with our images.
- Verify YMM: Confirm via fitment tool.
- Review Specs: Check pins & dimensions.
- Purchase: Buy confidently once matched!
Review Rewards
Share an install photo & review to unlock:
- Under $50 Orders: 3% Off Next Order
- $50+ Orders: 5% Direct Cashback
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$34.95
-
No hidden fees: What you see is what you pay.
-
Restore performance: Fix issues and drive with confidence.
Check Engine Light? Find Your Symptoms
🌬️ O2 & A/F Sensors
- P0134No Activity Detected
- P0135Heater Circuit Malfunction
- P0137/38Circuit Low/High Voltage
- P2195Signal Stuck Lean
- P0030/31Heater Control Circuit
⛽ Fuel & Air Mixture
- P0171/74System Too Lean
- P0172System Too Rich
- P2096Post-Catalyst Trim Too Lean
- P0087Fuel Rail Pressure Low
- P0201-04Injector Circuit Open
♻️ Catalytic Converters
- P0420Efficiency Below Threshold (B1)
- P0430Efficiency Below Threshold (B2)
⚡ Ignition / Misfires
- P0300Random Misfire
- P0301-06Cylinder-Specific Misfire
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 + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
234-4940
Interchange: 12659516, 12659516, 12666612, 21581, F00HL00421, 18187, LSH-25W |
|
Position
|
Exhaust System, Upstream (Pre-Catalytic Converter)
|
|
Key Parameters
|
- Sensor Type: Heated
- Wire Quantity: 4 Wires - Wire Harness Length: 13.19 in - Fit Type: Specific |
|
Core Part Number
|
234-4974
Interchange: 12657188, 12655678, 12657188, 21075, 12661898, 12643708, F00HL00410, 18054 |
|
Position
|
Exhaust System, Downstream (Post-Catalytic Converter)
|
|
Key Parameters
|
- Sensor Type: Heated
- Connector Gender: Male - Mounting Type: Threaded - Thread Diameter: 0.708 in - Wire Quantity: 4 Wires - Wire Harness Length: 13.19 in |
Package Content :
2PCS (12659516 Upstream+12657188 Downstream) Oxygen Sensor