Saturn Relay Vehicle Speed Sensor Guide for 2005-2007 Models
Experiencing hard shifting or a faulty speedometer in your Saturn Relay? Your vehicle speed sensor might be the culprit.
- The VSS is located INSIDE the transmission on a Saturn Relay, making replacement a job for a professional mechanic.
- Symptoms are severe and include hard shifting, a dead speedometer, and a Check Engine Light with code P0722.
- Choose a quality aftermarket brand like Delphi, Standard Ignition, or Walker Products for a reliable repair.
- Always confirm the diagnosis before repair, as wiring or other transmission issues can cause similar problems.
Is Your Saturn Relay's Speed Sensor Failing?
A bad vehicle speed sensor (VSS) on the 2005-2007 Saturn Relay causes very distinct problems. Because the transmission computer loses its most important piece of information—vehicle speed—it can't make smart decisions. This often results in poor drivability and warning lights on your dash.
Common Symptoms of a Bad VSS:
- Harsh or Erratic Shifting: The transmission may slam into gear, shift at the wrong times, or seem to hesitate before shifting. This is the most reported issue by owners.
- Faulty Speedometer: The speedometer needle may jump around, read an incorrect speed, or drop to zero while you are driving.
- Cruise Control Not Working: The cruise control system relies on a steady speed signal from the VSS, so it will stop working if the sensor fails.
- Check Engine Light: A failing VSS will almost always trigger a Check Engine Light. You will likely find trouble code P0722 (Output Speed Sensor No Signal) stored in the computer.
Important Note on Replacement Location
Unlike many other vehicles where the speed sensor is an easy-to-reach part on the outside of the transmission, the main vehicle speed sensor on the 2005-2007 Saturn Relay is located inside the automatic transmission case. This makes replacement a complex job that requires removing the transmission side cover and other components. This is not a simple one-bolt repair and is best left to a professional mechanic.
Choosing the Right Aftermarket Speed Sensor
Since Original Equipment (OEM) parts from a dealer can be expensive, a quality aftermarket sensor is a smart choice. However, not all brands are created equal. Here’s a breakdown of the available options.
Brand Quality Tiers
- Top Tier (OEM Equivalent): Delphi is a well-known Original Equipment supplier for General Motors. Choosing a Delphi sensor gives you confidence that you are getting a part built to the same standards as the one your van came with from the factory.
- Reliable Aftermarket: Brands like Standard Ignition (SMP) and Walker Products have a long history of making quality aftermarket sensors. They engineer their parts to meet or exceed OE specifications and perform extensive testing. These are solid, dependable choices for this repair.
- Value-Oriented: Dorman is a popular brand that offers a direct-fit replacement. While often a good value, it's important to inspect the part before installation. Some user reviews have mentioned issues like loose connectors, which can cause problems. Global Parts is another available brand, typically falling into the standard replacement category.
| Part Type | Estimated Price Range |
|---|---|
| New OEM (ACDelco) | $50 - $70 |
| New Aftermarket | $23 - $45 |
| Shop Labor Cost | $200 - $350+ |
Pro Tip: Due to the internal location of this sensor, labor costs will be the largest part of the repair bill. It is wise to have the mechanic also inspect the transmission fluid, filter, and other accessible internal components like the shift solenoids while the transmission is open.
Frequently Asked Questions (FAQ)
Can I replace the vehicle speed sensor myself?
For the 2005-2007 Saturn Relay, this is not recommended for a DIY mechanic. The sensor is inside the transmission and requires draining the fluid, removing the side cover, and potentially other components. This is a complex job that is best left to a professional technician.
Are there any recalls for the Saturn Relay speed sensor?
No, there are no specific recalls issued by the NHTSA for the vehicle speed sensor on the 2005-2007 Saturn Relay. However, transmission problems are a common complaint for this vehicle.
Is the Input Speed Sensor the same as the Output Speed Sensor?
No, they are different parts. The transmission uses both an input and an output speed sensor. The output speed sensor (VSS) is the one that reports the final speed to the speedometer and is the most common cause of the symptoms described here. Make sure you are ordering the correct sensor, which is typically listed as the "Output" or simply "Vehicle Speed Sensor."
Could something else cause the same symptoms?
Yes. While the VSS is a likely cause, bad wiring to the sensor, low or dirty transmission fluid, or a failing shift solenoid can also cause similar shifting problems. A proper diagnosis, starting with scanning for codes, is essential before replacing parts.
Technical Specifications
OEM Part Numbers: 10456568 24232088
This is the transmission OUTPUT speed sensor. It is a 2-terminal sensor that is located internally within the 4T65-E automatic transmission.
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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.
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