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Important: Verify connector shape and pins match your original part.
3Pcs O2 Sensor Set
Fits Chevy S10 & Blazer 4.3L (2002-2005)
Replaces OE: 234-4343
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
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- Under $50 Orders: 3% Off Next Order
- $50+ Orders: 5% Direct Cashback
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$49.95
High demand: Purchased recently this month
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No hidden fees: What you see is what you pay.
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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
|
Engine/Displacement
|
|---|---|---|---|
|
2003
|
Chevrolet
|
S10 Base
|
4.3L V6
|
|
2003
|
Chevrolet
|
S10 Xtreme
|
4.3L V6
|
|
2003
|
Chevrolet
|
S10 ZR2
|
4.3L V6
|
|
2003-2004
|
Chevrolet
|
Blazer LS
|
4.3L V6
|
|
2002-2004
|
Chevrolet
|
S10 LS
|
4.3L V6
|
|
2002-2004
|
Chevrolet
|
S10 ZR5
|
4.3L V6
|
|
2002-2005
|
Chevrolet
|
Blazer Xtreme
|
4.3L V6
|
|
2002-2005
|
Chevrolet
|
Blazer ZR2
|
4.3L V6
|
|
2005
|
Chevrolet
|
Blazer Base
|
4.3L V6
|
|
2002-2005
|
GMC
|
Jimmy
|
4.3L V6
|
|
2002-2004
|
GMC
|
Sonoma
|
4.3L V6
|
Product Specifications
Warranty & Support: 2 Years + Pre-sale Load Test + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
234-4343
Interchange: 234-4650, 12567254, 12590789, 89728-73520 |
|
Position
|
Exhaust System, Upstream (Front, Pre-Cat) & Downstream (Rear, Post-Cat)
|
|
Key Parameters
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- Sensor Type: Heated Oxygen Sensor
- Wire Count: 4-Wire - Connector: Male - Mounting Type: Threaded - Thread Diameter: 0.708 in (M18 x 1.5) - Wire Harness Length: 12.28 in - Fit: Specific Application - Performance: Improves fuel efficiency with stable and durable operation |
Package Content : 3Pcs 234-4343 Oxygen Sensor