Car Oxygen Sensor MD345773/MD366936/MR560365/MR560366
High-quality Lambda Sensor (Oxygen/O₂ Sensor) designed for Mitsubishi, Chrysler, and Dodge vehicles. This 4-wire heated switching-type sensor serves as a diagnostic probe for post-catalyst exhaust monitoring.
Product Specifications
| OE Part Number |
MD345773 (also MD 345773) |
| Manufacturer / Brands |
MITSUBISHI, CHRYSLER |
| Product Type |
Lambda Sensor (Oxygen / O₂ Sensor) |
| Sensor Type |
Heated, Switching-type Oxygen Sensor / Finger-type Sensor |
| Function |
Diagnostic Probe |
| Number of Circuits / Wires |
4 |
| Number of Pins |
4 |
| Cable Length |
290 mm (approx. 11.4 inches) |
| Overall Length |
540 mm (approx. 21.3 inches) |
| Resistance |
9 Ω |
| Thread Size |
M18 × 1.5 |
| Wrench / Spanner Size |
22 mm (7/8″) |
| Recommended Replacement Interval |
160,000 km (approx. 100,000 miles) |
| Quality Standard |
Manufactured to Mitsubishi's exacting standards, ensuring durability and longevity |
Technical Features
- 4-wire heated switching-type oxygen sensor (finger-type sensor) with two independent circuits
- Built-in heating element quickly brings ceramic sensing tip to operating temperature
- Enables ECU to enter closed-loop fuel control sooner, reducing cold-start emissions
- Functions as diagnostic probe monitoring oxygen content after catalytic converter
- Direct-fit component with vehicle-specific electrical connector and pre-terminated wiring
- Connector may require adjustment during installation
Cross-Reference & Interchange Numbers
This genuine Mitsubishi/Chrysler OEM component is interchangeable with the following part numbers. Always verify physical fitment before purchasing.
Primary OE Numbers
| Primary OE Number |
MD345773 |
| Related Mitsubishi OE Numbers |
MR560365, MR560366 |
| Chrysler OE Numbers |
MR560365, MR560366, ES20085 |
Aftermarket Equivalent Numbers
| DENSO |
234-4652 |
| STANDARD MOTOR PRODUCTS |
SG875, SG887, SG1679 |
| WELLS |
SU5970, SU5974, SU5977 |
| NTK |
23525 |
| WALKER PRODUCTS |
250-24243 |
| BOSCH |
13796 |
| BORGWARNER |
OS1629, OS1641 |
| OEXTRA |
REA1559 |
| ACDelco |
2131536 |
| KEM |
138-636 |
| Alternative Repair Kit |
570112 |
Vehicle Compatibility
Important Position Note: This is a rear (downstream/post-catalyst) oxygen sensor installed after the catalytic converter. Do not use it in the upstream (pre-catalyst/front) position. Upstream and downstream sensors are not interchangeable on most vehicles.
Mitsubishi Applications
| Model |
Year Range |
Engine / Position |
| Galant |
1999 - 2003 |
Rear (downstream) |
| Eclipse |
2000 - 2005 |
Rear (downstream) |
Chrysler Applications
| Model |
Year Range |
Engine / Position |
| Sebring |
2001 - 2005 |
Rear (downstream) |
Dodge Applications
| Model |
Year Range |
Engine / Position |
| Stratus |
2001 - 2005 |
Rear (downstream) |
Fitment Notes
- This is a rear (downstream/post-catalyst) oxygen sensor installed after the catalytic converter
- Compatible with both Mitsubishi and Chrysler vehicles
- How to verify: Locate your vehicle's catalytic converter - this sensor is installed in the pipe after the converter
- Not compatible with diesel engines - diesel applications use different sensors
- Always confirm compatibility using your vehicle's VIN or by physically inspecting your old sensor's position, connector shape, cable length (290 mm), and thread size (M18 × 1.5)