Jeep Commander 2006-2010 Transmission Input Speed Sensor Failures & Replacement
If your Commander is stuck in gear or shifting harshly, this inexpensive sensor is the most likely cause.
- This is a very common failure point on 2006-2010 Jeep Commanders and often mistaken for a failed transmission.
- Symptoms include the transmission being stuck in gear (limp mode), harsh shifting, and a check engine light.
- It is highly recommended to replace both the input and output sensors at the same time, as they are identical parts and prone to similar failure rates.
- The replacement is an easy DIY job, requiring only basic tools and access to the driver's side of the transmission.
Is Your Transmission Failing or Is It Just a Sensor?
A faulty transmission input speed sensor on a 2006-2010 Jeep Commander can make you think the entire transmission needs to be replaced. The symptoms are often sudden and severe, but the fix is surprisingly simple and affordable. This issue is a well-known failure point for the 45RFE and 545RFE transmissions used in these Jeeps. Before you budget for a major transmission overhaul, read these common symptoms.
Symptoms of a Bad Input Speed Sensor
When the input speed sensor fails, the Powertrain Control Module (PCM) loses critical information and puts the transmission into a protective "limp mode". This can include:
- Harsh Shifting: The transmission may slam into gear, especially when shifting from Park into Drive or Reverse.
- Stuck in Gear (Limp Mode): The transmission may get stuck in a single gear, usually 2nd or 3rd, and refuse to shift up or down. This prevents the vehicle from accelerating properly and can cause high RPMs at moderate speeds.
- Check Engine Light: A sensor failure will almost always trigger the Check Engine Light. You will likely find diagnostic trouble codes (DTCs) like P0716 or P0717 stored in the computer.
- Cruise Control Disabled: The cruise control system relies on accurate speed readings and will not function if the sensor has failed.
Pro Tip: Replace Both Sensors
Your Commander has two identical transmission speed sensors—one input and one output—located on the driver's side of the transmission. They are the same part number and are known to fail. Since they are inexpensive and you're already working in the area, it is highly recommended to replace both at the same time to avoid a similar failure in the near future.
Choosing the Right Aftermarket Part: Brand Matters
For critical electronic sensors, brand quality is important. While an OEM Mopar sensor is always an option, high-quality aftermarket brands offer reliable performance at a better price. Based on owner feedback, not all aftermarket brands are created equal.
- Tier 1 (Recommended): NGK (NTK)
NTK is the sensor division of NGK, a company known for being an original equipment (OE) supplier to many automakers. Forum discussions among Jeep owners consistently rate NTK as the best aftermarket choice, just below the more expensive Mopar original. They are known for reliable performance and proper function. - Tier 2: Standard Ignition (SMP)
Standard Motor Products is a large aftermarket manufacturer. While they produce a wide range of parts, some enthusiasts consider their sensor quality to be a step below NTK or OEM Mopar. They can be a viable option, but for a critical part like a transmission speed sensor, NTK is the more trusted choice in the Jeep community.
Cost to Replace a Jeep Commander Input Speed Sensor
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part (NGK, Standard) | $37.97 - $39.40 |
| Shop Labor | $60 - $120 |
| Total Estimated Cost | $98 - $160 |
Note: The replacement is a simple DIY job for those with basic tools, which can eliminate labor costs. The sensor is held by a single bolt and is externally mounted.
Frequently Asked Questions
Where is the input speed sensor located on a 2006-2010 Jeep Commander?
The input speed sensor is located on the driver's side of the transmission case, toward the front of the vehicle. The nearly identical output speed sensor is located just a few inches behind it, toward the rear.
Can I replace this sensor myself?
Yes, this is a very common and easy DIY repair. It requires safely raising the vehicle, unplugging the electrical connector, removing a single 8mm bolt, and swapping the old sensor for the new one. No special tools are needed.
Are there any recalls for this part?
No, there are no recalls from the NHTSA for the transmission speed sensors on the 2006-2010 Jeep Commander. This is considered a standard wear-and-tear maintenance item.
What's the difference between a transmission speed sensor and a wheel speed sensor?
Transmission speed sensors measure the rotational speed inside the transmission to control shifting. Wheel speed sensors (or ABS sensors) are located at each wheel and are used for the Anti-lock Brake System (ABS) and traction control. While a bad wheel speed sensor can also cause issues, the symptoms described here are specific to the transmission sensors.
Technical Specifications
OEM Part Numbers: 4799061AB 52108308AC 04799061
2-wire magnetic pickup sensor. Located on the driver's side of the 45RFE or 545RFE transmission case. The input and output sensors are identical.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Jeep Commander: