Car Oxygen Sensor L34B18861A/L34B18861B For Mazda
Price:
To Be Negotiated
MOQ:
50
Delivery Time:
1-4weeks
Brand:
RMOS
Product Description
Car Oxygen Sensor L34B18861A/L34B18861B For Mazda
Product Specifications
| Specification | Details |
|---|---|
| OE Part Number | L34B18861A (also L34B-18-861A) |
| Brand | MAZDA (Genuine Original Equipment) |
| Product Type | Lambda Sensor (Oxygen / O₂ Sensor) |
| Sensor Type | Heated Oxygen Sensor |
| Number of Wires | 4 |
| External Thread Size | M18 x 1.5 |
| Placement on Vehicle | After Catalytic Converter (Rear / Lower Position) |
Technical Notes
- This is a 4-wire heated oxygen sensor manufactured to Mazda's original equipment (OE) standards. The four wires serve two independent circuits — two for the internal heater and two for the sensor signal and ground.
- The built-in heating element quickly brings the ceramic sensing tip up to operating temperature after a cold start, enabling the ECU to enter closed-loop fuel control sooner and reduce cold-start emissions.
- The sensor monitors oxygen content in the exhaust gases and sends data to the engine control unit to optimize the air-fuel mixture, ensuring proper emissions performance and fuel efficiency.
- This sensor is typically installed in the rear (downstream / post-catalyst) position, located after the catalytic converter.
- This part is a direct-fit component featuring a vehicle-specific electrical connector and pre-terminated wiring, eliminating the need for cutting or splicing during installation.
- Genuine Mazda OE parts are designed to fit your specific Mazda model perfectly and are backed by a manufacturer's warranty.
Cross-Reference & Interchange Numbers
This Lambda Sensor is a genuine Mazda Original Equipment component. The following part numbers are directly interchangeable.
Always verify physical fitment (connector shape, cable length and thread size) with your original part before purchasing.
| Type | Part Number(s) |
|---|---|
| Primary OE Number | L34B18861A, L34B-18-861A |
| Superseding OE Number | L34B18861B, L34B-18-861B |
| Related Mazda OE Number | LFBM18861 |
| Aftermarket References | ADM57036, 177507 |
Cross-Reference Notes
- L34B18861B is the direct superseding part number for this sensor. The "B" suffix typically indicates a later revision or supersession of the original "A" version.
- For Mazda vehicles, the equivalent OE numbers include L34B18861A, L34B18861B, and LFBM18861.
- Blue Print ADM57036 is a high-quality aftermarket equivalent.
- Febi Bilstein 177507 is another professional-grade replacement option.
- Always physically compare your old sensor's connector shape, pin count (4), cable length, and thread size (M18 x 1.5) before purchasing.
Compatible Vehicles
This Lambda Sensor is an original equipment component primarily used in Mazda vehicles, specifically the Mazdaspeed3 and certain Mazda 3 models with 2.3L turbocharged engines.
Mazda Applications
| Model | Year Range | Engine / Trim | Position |
|---|---|---|---|
| Mazdaspeed3 | 2007 - 2013 | 2.3L L4 - Turbo (DISI Turbo) | Rear / Lower |
| Mazda 3 | 2007 - 2013 | 2.3L L4 (Mazdaspeed trim) | Rear |
| Mazda 3 | 2008 - 2013 | 2.0L L4 (Mazdaspeed, S, i trims) | Rear |
Detailed Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine |
|---|---|---|---|---|
| 2013 | Mazda | 3 | Mazdaspeed | 2.3L L4 - Gas |
| 2012 | Mazda | 3 | Mazdaspeed | 2.3L L4 - Gas |
| 2011 | Mazda | 3 | Mazdaspeed | 2.3L L4 - Gas |
| 2010 | Mazda | 3 | Mazdaspeed | 2.3L L4 - Gas |
| 2009 | Mazda | 3 | Mazdaspeed, S, i | 2.0L L4 - Gas, 2.3L L4 - Gas |
| 2008 | Mazda | 3 | Mazdaspeed, S, i | 2.0L L4 - Gas, 2.3L L4 - Gas |
| 2007 | Mazda | 3 | Mazdaspeed, S, i | 2.0L L4 - Gas, 2.3L L4 - Gas |
Fitment Notes
- This is a rear (downstream / post-catalyst) oxygen sensor. It is installed after the catalytic converter.
- Primary application is the Mazdaspeed3 with the 2.3L DISI Turbo engine.
- Also compatible with select Mazda 3 models equipped with 2.0L and 2.3L engines.
- The sensor is described as a "Lower Oxygen Sensor" or "Rear Oxygen Sensor" in Mazda parts catalogues.
- Engine codes associated with this sensor include L3KG and L3N9.
- How to verify: Locate your vehicle's catalytic converter. This sensor is installed in the pipe after the converter. If your faulty sensor is located before the converter, this part is not suitable for your application.
- Not compatible with diesel engines — diesel applications use different sensors with different calibration parameters.
- The vehicle fitment information above is a guide only. Always confirm compatibility using your vehicle's VIN or by physically inspecting your old sensor's position (rear / downstream), connector shape, and thread size before ordering.
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Company
Hefei Ruimin Electronic Technology Co., Ltd.
Location
Second Floor, No. 4 Building, No. 1666, Ningxi Road, High-Tech District,Hefei,Anhui,China
Contact Person
Mark