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2Pcs O2 Sensor Upstream & Downstream for Mazda 3 2.3L (2010-2013) | 234-5042 234-4391
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2Pcs O2 Sensor Upstream & Downstream for Mazda 3 2.3L (2010-2013) | 234-5042 234-4391

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$63.95
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🇺🇸 Free US Shipping • Fast from local warehouse
↩️ 30-Day Returns
Easy FL Return
🛡️ 2-Year Warranty
100% Brand New
🤝 Direct Fit
Guaranteed Match
⚠️ Symptoms to Fix:
  • Check Engine Light (P0420, P0171)
  • Rough idling & bad gas mileage
✅ Why Choose Us:
  • 100% Direct OEM Fit & Connector
  • Easy 15-Min DIY Install

Automotive-Leader Sensors

Vehicle Compatible

Year
Make
Model
Engine/Displacement
2013
Mazda
3 Grand Touring
2.3L (Turbo)
2013
Mazda
3 Mazdaspeed
2.3L (Turbo)
2012
Mazda
3 Grand Touring
2.3L (Turbo)
2012
Mazda
3 Mazdaspeed
2.3L (Turbo)
2011
Mazda
3 Grand Touring
2.3L (Turbo)
2011
Mazda
3 Mazdaspeed
2.3L (Turbo)
2010
Mazda
3 Grand Touring
2.3L (Turbo)
2010
Mazda
3 Mazdaspeed
2.3L (Turbo)

Product Specifications

Warranty & Support: 2 Years + 24/7 Technical Support
Item
Specification
Core Part Number
234-5042
Interchange: 2345042, L3CE-18-8G1, L3CE188G1, L3M6-18-8G1D, L37J-18-8G1, 24393, 250-25066
Position
Exhaust System, Upstream (Pre-Catalytic Converter)
Key Parameters
- Type: Heated Oxygen Sensor
- Wire Quantity: 5-Wire
- Connector Gender: Male
- Thread Diameter: 0.711 IN
- Wiring Harness Length: 29.53 IN
Item
Specification
Core Part Number
234-4391
Interchange: 2344391, 234 4391, L34B18861A, L34B18861B, 250-24795, 18073, 350-34507, 24442
Position
Exhaust System, Downstream (Post-Catalytic Converter)
Key Parameters
- Type: Heated Oxygen Sensor
- Wire Quantity: 4-Wire
- Connector Gender: Female
- Thread Diameter: 0.708 IN
- Wiring Harness Length: 14.17 IN

 

Package Content :

2Pcs (1*234-5042 Upstream+1*234-4391 Downstream) Oxygen Sensor

A Guide for Users Without Repair Experience

1. When your vehicle malfunctions, use a CBD to scan and identify the fault codes (if you're unsure how to scan or interpret the codes, visit our blog for guidance).

2. Identify the faulty component based on the diagnostic code and remove it.

3. Select your vehicle's year, model, and brand directly from the search panel below, or search by the part number on the component to verify compatibility.

4. After selecting, click “Search.” A green result confirms the part is compatible. If unsure, click the result below to view deta

Please check the fitment notes for Oxygen sensor installation location information!!!

Bank 1 Sensor 1 means Upstream Right/Rear; Bank 2 Sensor 1 means Upstream Left/Front

Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front

sensor 1=Upstream sensor 2=Downstream

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