Description
Genuine Mopar Transmission Output Speed Sensor – OEM Part # 04800879 Product Overview: This is a genuine Mopar Transmission Output Speed Sensor (OSS) , factory part number 04800879 . This vital electronic sensor is mounted on the transmission case and monitors the rotational speed of the transmission's output shaft. This speed data is sent directly to the vehicle's Powertrain Control Module (PCM) or Transmission Control Module (TCM) and is critical for determining correct shift timing, controlling torque converter clutch (TCC) lock-up, and providing the signal for the vehicle's speedometer. A faulty output speed sensor will cause a range of drivability and instrumentation issues. Common Symptoms of a Failed Output Speed Sensor: Inoperative or Erratic Speedometer: The speedometer may drop to zero, flutter, or display incorrect speed (most common symptom). Harsh, Delayed, or Erratic Shifting: The transmission may shift late, early, or roughly due to incorrect shift point calculations. Torque Converter Clutch (TCC) Malfunction: May cause slippage, shudder, or reduced fuel economy on the highway. Transmission "Limp Mode": PCM may force the transmission into a fail-safe gear (often 2nd or 3rd). Check Engine Light (MIL) & Diagnostic Trouble Codes (DTCs): Illumination is guaranteed. Key codes include: P0720 – Output Speed Sensor Circuit Malfunction P0500 (Vehicle Speed Sensor) or P0700 (Transmission Control System) Why Choose This Genuine Mopar Sensor? Precision Signal Accuracy: Generates the exact electrical signal your vehicle's PCM is programmed to expect. Direct Fit and Proper Sealing: Prevents transmission fluid leaks with correct integral seal/O-ring. Reliable Performance: Manufactured to Mopar specifications for durability. Cost-Effective Repair: Often a straightforward fix for complex-seeming transmission and speedometer problems. Vehicle Compatibility: This genuine sensor 04800879 is widely used across many Chrysler, Dodge, Jeep, and Plymouth vehicles. Verify fitment for your specific model and year. Brand Primary Model Examples Key Model Years (Approx.) Chrysler 300, Concorde, Town & Country, Pacifica, Sebring, PT Cruiser 1995 – 2010 Dodge Caravan/Grand Caravan, Stratus, Avenger, Intrepid, Ram Pickups, Journey 1995 – 2019 Jeep Grand Cherokee (WJ) 1999 – 2004 Plymouth Voyager/Grand Voyager, Breeze, Neon 1996 – 2000 ⚠️ Important Pre-Purchase & Installation Notes: Accurate Diagnosis: Read DTCs to confirm a P0720 code and rule out wiring issues. Verify Compatibility: Providing your vehicle's 17-digit VIN is the most reliable way to confirm the correct part. Professional Installation Recommended: Care must be taken during installation to prevent damage or leaks. A new sealing O-ring/gasket must be used. Clear Fault Codes: Stored fault codes will need to be cleared with a scan tool after installation. Package Includes: 1 x Genuine Mopar Transmission Output Speed Sensor (Part Number: 04800879 ). On Jan 11, 2026 at 09:39:01 PST, seller added the following information:
Very happy - item was shipped fast and well packed, arrived safely. Seller was very communicative and helpful with steps to follow for a successful install, and after install the drive worked perfectly. Brought my first-gen PS5 back to life!
Reasonable quality. Could be packaged better for postage. first unit arrived broken with a chip on the corner. Seller did supply a second unit at no extra cost.
Excellent seller! Item exactly as described, fast shipping, and well-packaged. Great communication and smooth transaction. Highly recommended!
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