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Car Oxygen Sensor MN137944 / MD351752/MD340904 For Mitsubishi
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Car Oxygen Sensor MN137944 / MD351752/MD340904 For Mitsubishi
| Place of Origin | China |
| Brand Name | RMOS |
| Model Number | MN137944 / MD351752/MD340904 |
Product Details
Technical Information:
Sensor Type: O2
OE Number:
MN137944 / MD351752/MD340904
Model:
Mitsubishi
Thread Diameter:
M18 × 1.5
Light-Off Time:
≤ 15 Seconds
Connector Type:
Direct-Fit
Cable Length:
Approx. 480 Mm
Tested:
100% Tested
Quality:
OE Quality
Highlight:
Mitsubishi car oxygen sensor
,MN137944 oxygen sensor
,MD351752 auto oxygen sensor
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)
These Lambda Sensors are Original Equipment (OE) components manufactured for Mitsubishi vehicles. The OE numbers MN137944 and MD351752 are directly interchangeable and refer to sensors used across the same Mitsubishi vehicle family.
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 for efficient combustion. They feature a 4-wire heated design, allowing them to reach operating temperature quickly for precise air-fuel ratio measurement.
Important Note: These two OE numbers are functionally interchangeable and are listed together across multiple aftermarket catalogues. They refer to the same physical sensor used in the upstream (pre-catalyst) position on Mitsubishi vehicles.
Technical Specifications
| Specification | MN137944 | MD351752 |
|---|---|---|
| OE Part Numbers | MN137944, MN 137 944 | MD351752 |
| Sensor Type | Heated Oxygen Sensor | Heated Oxygen Sensor |
| Sensor Technology | Narrowband Zirconia (Switching Type) | Narrowband Zirconia |
| Number of Wires / Poles | 4-pin connector | 4-pin connector |
| Cable Length | 305 – 480 mm (varies by manufacturer) | 280 – 530 mm (varies by manufacturer) |
| Connector Shape | Rectangular | Rectangular |
| Thread Size | M18 * 1.5 | M18 * 1.5 |
| Spanner / Socket Size | 22 mm (7/8″) | 22 mm (7/8″) |
| Placement on Vehicle | Before Catalytic Converter (Upstream) | Before Catalytic Converter (Upstream) |
| Function | Regulating Sensor | Regulating Sensor |
| Heated | Yes | Yes |
Technical Notes
- These are 4-wire heated narrowband zirconia oxygen sensors (switching type), manufactured to Mitsubishi'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.
- As upstream (pre-catalyst) regulating sensors, they are installed before the catalytic converter.
- The sensors monitor oxygen content in the exhaust gases and send data to the ECU to optimize the air-fuel mixture, ensuring proper emissions performance and fuel efficiency.
- As direct-fit components, they feature vehicle-specific electrical connectors (rectangular, 4-pin) and pre-terminated wiring, eliminating the need for cutting or splicing during installation.
Cross-Reference & Interchange Numbers
The following OE numbers are directly interchangeable with MN137944 and MD351752. Always verify physical fitment (connector shape, cable length and thread size) with your original part before purchasing.
| Type | Part Number(s) |
|---|---|
| Primary OE Numbers | MN137944, MD351752 |
| Related Mitsubishi OE Numbers | MD329341, MD340904, MR507378, MR507749, 19060206, 1588A020, 1588A081, MD327611, MD342323, MD345772, MD354850, MD354851, MD357284, MN158757, MN158758, MN163491, MR507385, MR507386, MR578199, MR514477, MR578634, MR985102 |
| Volvo OE Number | 30873634 |
Cross-Reference Notes
- Both MN137944 and MD351752 are listed together across multiple aftermarket catalogues as interchangeable OE references.
- The OE numbers MD329341, MD340904, and MR507378 are also commonly cross-referenced with both MN137944 and MD351752.
- Volvo vehicles also use this sensor under OE number 30873634.
- The TRQ OSA61253 and OSA61665 oxygen sensors list both MN137944 and MD351752 in their OE cross-reference lists.
- Always physically compare your old sensor's connector shape (rectangular, 4-pin), cable length, and thread size (M18 * 1.5) before purchasing.
Vehicle Compatibility
These Lambda Sensors are original equipment components primarily used in Mitsubishi vehicles. The sensors are installed in the upstream (pre-catalyst) position.
Important Position Note: These are upstream (pre-catalyst) oxygen sensors — installed before the catalytic converter. Do not use them in the downstream (post-catalyst) position unless your vehicle's original sensor was located there. Upstream and downstream sensors are not interchangeable on most vehicles.
Mitsubishi Applications
| Model | Chassis / Generation | Year Range | Engine / Notes |
|---|---|---|---|
| Lancer IX (Lancer 9) | CS, CT (CS1A, CS3A) | 2000 – 2013 | 1.3L (4G13), 1.6L (4G18) |
| Lancer VII | CS_A, CT_A | 2000 – 2013 | 1.3L, 1.6L |
| Lancer VII Estate | CS_W, CT_W | 2003 – 2008 | 1.6L |
| Lancer / Lancer Classic | CS3A (Europe) | 2003 – 2011 | 1.3L, 1.6L |
| Carisma | DA (DA2A, DAO) | 1995 – 2006 | 1.8L, 1.8L 16V GDI (4G93) |
| Space Star | DGA (DG5A) | 1995 – 2006 | 1.8L GDI (4G93) |
| Eclipse | — | 2000 – 2012 | 2.4L |
| Mirage | — | 1998 – 2002 | Various petrol engines |
| L200 | K7T, K6T, K5T | 1996 – 2011 | Various petrol engines |
Volvo Applications (Cross-Brand Compatibility)
| Model | Year Range | Engine / Notes |
|---|---|---|
| S40 I | 1995 – 2004 | Various petrol engines |
| V40 | 1995 – 2004 | Various petrol engines |
Fitment Notes
- These are upstream (pre-catalyst) oxygen sensors. They are installed before the catalytic converter and serve as the primary regulating probes for air-fuel mixture control.
- Lancer IX (2000-2013): This sensor is used on 1.3L (4G13) and 1.6L (4G18) engines.
- Lancer CS3A: For Lancer/Lancer Classic (CS3A) models produced between 2003 and 2011, this is the upstream oxygen sensor.
- Carisma: Compatible with 1.8L (4G93) engine variants.
- Space Star: Compatible with 1.8L GDI (4G93) engine.
- 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. If your faulty sensor is located before the converter, these part numbers are suitable.
- 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, and thread size before ordering.
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