Skip to product information
In stock
Expert Recommendation: Always replace upstream sensors in pairs. If one fails, the other is likely at the end of its lifespan.
Suitable for 2Pcs Oxygen Sensor
for Mazda 3 Mazda 5 2.0L 2.3L (04-07)
Replaces OE: 234-4390 234-4396
$32.95
Final:
$31.30
-5% OFF
Order today, estimated delivery:
Calculating...
- Free US Shipping (Local Warehouse)
- 30-Day Return, Exchange, and Refund Guarantee
- 2-Year Warranty (100% Brand New)
- Guaranteed Exact Fit
- Secure Encrypted Payment
Check Fitment Below: If your vehicle matches, place your order directly with confidence!
Mechanic or Auto Repair Shop?
We offer exclusive wholesale pricing and bulk discounts for professional auto repair shops and dealers. We support both online and offline qualification verifications. Partner with us for reliable inventory!
Sensor Installation Blueprint
👨🔧 Mechanic's Installation Notes:
This is a PAIR of UPSTREAM sensors. V6 and V8 engines have two banks (Bank 1 & Bank 2), requiring two identical upstream sensors.
Location: Screws directly into the left and right Exhaust Manifolds, BEFORE the catalytic converter.Expert Recommendation: Always replace upstream sensors in pairs. If one fails, the other is likely at the end of its lifespan.
Automotive-Leader Sensors
Applications
|
Year
|
Make
|
Model
|
Engine/Displacement
|
|---|---|---|---|
|
2006-2007
|
Mazda
|
5 (Sport, Touring, Grand Touring)
|
2.3L L4
|
|
2004-2005
|
Mazda
|
3 (2.0L versions, e.g., GS, GX, i)
|
2.0L L4
|
|
2004-2005
|
Mazda
|
3 (2.3L versions, e.g., GT, S)
|
2.3L L4
|
Product Specifications
Warranty & Support: 2 Years + Pre-sale Load Test + 24/7 Technical Support
|
Item
|
Specification
|
|---|---|
|
Core Part Number
|
L3A1-18-861A
Interchange: L3A1-18-861B, LF66-18-861A, LF68-18-861B, 2133889, 24232, REA2013 |
|
Position
|
Exhaust System, Upstream (Pre-Catalytic Converter)
|
|
Key Parameters
|
- Type: Heated Oxygen (O2) Sensor
- Wires: 4-Wire Configuration - Product Fit: Direct Fit / Plug & Play - Performance: Improves exhaust purification rate and engine performance - Construction: High-temperature and corrosion-resistant materials for extended lifespan |