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Car Oxygen Sensor Z601-18-861A / Z601-18-861B For Mazda
| Place of Origin | China |
| Brand Name | RMOS |
| Model Number | Z601-18-861A / Z601-18-861B |
Product Details
Technical Information:
Sensor Type: O2
OE Number:
Z601-18-861A / Z601-18-861B
Model:
Mazda
Thread Diameter:
M18 × 1.5
Light-Off Time:
≤ 15 Seconds
Connector Type:
Direct-Fit
Cable Length:
Approx. 500 Mm
Tested:
100% Tested
Quality:
OE Quality
Highlight:
Mazda car oxygen sensor
,Auto oxygen sensor Z601-18-861A
,Oxygen sensor for Mazda vehicles
Payment & Shipping Terms
Minimum Order Quantity
50
Price
To Be Negotiated
Packaging Details
Foam Bag + Paper box
Delivery Time
1-4weeks
Payment Terms
T/T
Supply Ability
20000pcs/Month
Product Description
Lambda Sensor (Oxygen Sensor) for Mazda Vehicles
OE Part Numbers: Z601-18-861A / Z601-18-861B
Product Overview
These Lambda Sensors are Original Equipment (OE) components manufactured for Mazda vehicles, specifically designed for the Mazda 3 (BK) / Axela platform. The OE numbers Z601-18-861A and Z601-18-861B are directly interchangeable and refer to sensors used in the same vehicle family, with the primary difference being their specific position in the exhaust system.
These sensors monitor oxygen content in the exhaust gases and relay this information to the Engine Control Unit (ECU) to ensure the optimal air-fuel mixture is maintained throughout operation for efficient combustion. The sensors feature a 4-wire heated design with a planar probe, allowing them to reach operating temperature quickly for precise air-fuel ratio measurement.
Technical Specifications
| Specification | Z601-18-861A | Z601-18-861B |
|---|---|---|
| OE Part Numbers | Z601-18-861A, Z60118861A | Z601-18-861B, Z60118861B |
| Sensor Type | Heated Oxygen Sensor (Lambda Sensor) | Heated Oxygen Sensor (Lambda Sensor) |
| Sensor Technology | ZrO₂ (Zirconium Oxide) | ZrO₂ (Zirconium Oxide) |
| Number of Conductors / Pins | 4 | 4 |
| Cable Length | 500 mm (approx. 19.7 inches) | 480 – 600 mm (approx. 18.9 – 23.6 inches) |
| Thread Size | M18 * 1.5 | M18 * 1.5 |
| Fitting Position | Upstream (Front / Pre-Catalyst) | Upstream (Front / Pre-Catalyst) |
| Function | Regulating Probe | Regulating Probe |
| Fitment Type | Vehicle Specific / Direct-Fit | Vehicle Specific / Direct-Fit |
| Housing Colour | Black | Black |
| Weight | 0.15 kg (approx.) | 0.15 kg (approx.) |
Technical Notes:
- These are 4-wire heated planar-type oxygen sensors manufactured to Mazda's original equipment standards
- 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 sensors are constructed with a high-quality stainless-steel shell and high-temperature resistant ABS housing, with the internal chip treated for corrosion and vibration resistance
- As direct-fit components, they feature vehicle-specific electrical connectors and pre-terminated wiring, eliminating the need for cutting or splicing during installation
- The threads are factory pre-greased with anti-seize compound for quick and easy installation
- All sensors are manufactured to meet or exceed original equipment quality standards
Cross-Reference & Interchange Numbers
The following OE numbers are directly interchangeable with Z601-18-861A and Z601-18-861B. Always verify physical fitment (connector shape, cable length and thread size) with your original part before purchasing.
| Type | Part Number(s) |
|---|---|
| Primary OE Numbers | Z601-18-861A, Z601-18-861B, Z60118861A, Z60118861B |
| Related Mazda OE Numbers | Z601-18-861, Z6T1-18-861, Z602-18-861, Z602-18-861A, ZJ39-18-861A |
| Aftermarket Interchange | DOX-0331, DOX-0113, ADM57016, 234-9085, 920049808, 09SKV740, 77593, 90076, 90239, LS140118, VE381350, ES1112212B1, LLB865, LEB5392, 64879, J1463017, EOS4502, 884550008 |
Vehicle Compatibility
These Lambda Sensors are original equipment components primarily used in Mazda vehicles, specifically the Mazda 3 (BK) and Mazda Axela platforms.
⚠️ Important Position Note: These are upstream (pre-catalyst / front) oxygen sensors — installed before the catalytic converter. The Z601-18-861A and Z601-18-861B are functionally interchangeable for the upstream position. The downstream (post-catalyst) sensor for these vehicles typically uses a different part number (e.g., Z602-18-861A).
Mazda Applications
| Model | Chassis / Generation | Year Range | Engine / Notes |
|---|---|---|---|
| Mazda 3 / Axela | BK (First Generation) | 2003 – 2009 | 1.4L, 1.6L, 2.0L, 2.3L petrol |
| Mazda 3 / Axela | BK (First Generation) | 2004 – 2009 | 2.0L, 2.3L L4 |
| Mazda 3 / Axela | BK (First Generation) | 2003 – 2009 | 1.4L, 1.6L |
| Mazda 3 Saloon | BK (First Generation) | 2003 – 2009 | 1.3L, 1.6L |
| Mazda Axela | BK5P | Apr 2004+ | ZY-VE engine, Right-hand drive |
| Mazdaspeed Axela | BK3P | Sep 2003+ | L3-VDT engine, Right-hand drive |
Additional Compatibility
- Mazda 2 – Selected models
- Mazda 6 – Selected models
- Mazda MX-5 – Selected models
Detailed Engine Fitment
| Engine Displacement | Engine Code | Power Output | Applications |
|---|---|---|---|
| 1.3L | — | 62 kW (84 hp) | Mazda 3 Saloon (BK) |
| 1.4L | — | — | Mazda 3 (BK) |
| 1.6L | ZY-VE | 77 kW (105 hp) | Mazda 3 (BK), Mazda Axela BK5P |
| 2.0L | — | — | Mazda 3 (BK) |
| 2.3L | L3-VDT | — | Mazdaspeed Axela BK3P |
Fitment Notes:
- This is an upstream (pre-catalyst / front) oxygen sensor. It is installed before the catalytic converter and serves as the primary regulating probe for air-fuel mixture control
- Both Z601-18-861A and Z601-18-861B are used in the upstream position and are functionally interchangeable for this application
- The Z602-18-861A is the corresponding downstream (post-catalyst) sensor for these vehicles
- How to verify: Locate your vehicle's catalytic converter. The upstream sensor is typically installed in the exhaust manifold or in the pipe immediately before the catalytic converter. The downstream sensor is installed after the converter. If your faulty sensor is located before the converter, these part numbers are suitable. If located after the converter, you need part number Z602-18-861A
- Production period: These sensors are designed for vehicles manufactured between 2003 and 2009
- 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, connector shape, cable length, and thread size before ordering
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