Chevrolet Malibu Vehicle Speed Sensor Guide (2012-2020)
Experiencing a jumpy speedometer or harsh shifting in your Malibu? Your Vehicle Speed Sensor might be the culprit.
- Symptoms like a jumpy speedometer and rough shifting are strong indicators of a VSS failure in a Malibu.
- A bad VSS can disable safety systems like ABS and traction control, making it a critical repair.
- On many 2012-2020 Malibus, the sensor is inside the transmission, making replacement more difficult than on older cars.
- Choosing an OEM-supplier brand like Delphi is a reliable option for aftermarket replacement.
Is Your Malibu's Speedometer Acting Up?
A failing Vehicle Speed Sensor (VSS) on a 2012-2020 Chevrolet Malibu can cause more than just an incorrect speedometer reading. Since the VSS provides data to multiple systems, a bad sensor can lead to serious transmission issues and disable safety features. Symptoms often start small but can worsen over time, potentially leading to costly transmission damage.
Don't Ignore the Signs
Driving with a faulty speed sensor can be unsafe. It may cause the anti-lock braking system (ABS) to malfunction, which could lead to a loss of braking control in emergencies. It's best to address the issue as soon as symptoms appear.
Common Symptoms of a Failing VSS
- Erratic Speedometer: The needle may jump around, read an incorrect speed, or not move at all.
- Harsh or Delayed Shifting: The automatic transmission may shift gears roughly, too early, or too late because it's not getting accurate speed information.
- Check Engine Light: A faulty VSS will often trigger the Check Engine Light and store error codes like P0501.
- Cruise Control Not Working: The cruise control system relies on the VSS to maintain a set speed and will not engage if the sensor signal is lost.
- ABS or Traction Control Warning Lights: The ABS and traction control systems use speed data to function; a bad sensor can disable them and turn on their warning lights.
Choosing the Right Aftermarket Speed Sensor
When replacing the VSS on your Malibu, you have several options. While OEM parts are available from the dealer, quality aftermarket parts can offer a significant cost saving. It's important to understand the different tiers of aftermarket brands.
- OEM Supplier (Tier 1): Brands like Delphi are often the original equipment manufacturer for General Motors. Choosing a Delphi sensor is the closest you can get to the original part's quality and fit without the dealership price tag. They are a top-tier choice for reliability.
- Reputable Aftermarket (Tier 2): Standard Ignition (SMP) is a well-known brand that produces reliable aftermarket electronics. Their parts are a solid choice and often provide a good balance between cost and quality.
- Value-Oriented (Tier 3): Brands like Holstein offer a budget-friendly option. While they often come with good warranties and claim to meet OE specifications, real-world feedback can be mixed. They can be a good choice if budget is the primary concern, but for a critical sensor like the VSS, sticking with a Tier 1 or Tier 2 brand is often recommended to avoid future issues.
| Brand Tier | Example Brands | Estimated Price |
|---|---|---|
| OEM Supplier | Delphi | $45 - $87 |
| Reputable Aftermarket | Standard Ignition | $30 - $60 |
| Value-Oriented | Holstein | $11 - $30 |
Input vs. Output Sensors
Your Malibu's transmission has both an Input Speed Sensor (ISS) and an Output Speed Sensor (OSS). The OSS is what's typically referred to as the Vehicle Speed Sensor (VSS) and is responsible for the symptoms listed above. The ISS measures the speed of the transmission's input shaft. Be sure to order the correct sensor based on your diagnostic codes.
Frequently Asked Questions (FAQ)
Where is the Vehicle Speed Sensor located on a 2012-2020 Malibu?
The Vehicle Speed Sensor (also called the output speed sensor) is typically located on the exterior of the transmission housing. On many Malibu models with the 6-speed automatic transmission (like the 6T40/6T45), accessing and replacing it may require removing the transmission valve body cover, which makes it a more involved job. Always consult a repair manual for your specific year and engine combination.
Can I replace the VSS myself?
For a skilled DIY mechanic, this is a feasible job. However, on many 2012-2020 Malibus, the sensor is located inside the transmission side cover, requiring you to drain the transmission fluid and remove the cover. This makes it more complex than sensors that are simply bolted to the outside. If you are not comfortable with this level of work, professional installation is recommended.
Are there any recalls for the speed sensor on my Malibu?
There are no direct recalls for the Vehicle Speed Sensor itself for the 2012-2020 Chevrolet Malibu. However, GM has issued Technical Service Bulletins (TSBs) for related issues, such as TSB 19-NA-225, which addresses wiring harness problems that can cause speed sensor-related error codes (like C0035, C0040) and other electronic issues on 2019-2020 models. Another document, PIE0529A, shows GM engineering investigating wheel speed sensor inoperative conditions on 2019-2020 models.
What's the difference between a Vehicle Speed Sensor and a Wheel Speed Sensor?
A Vehicle Speed Sensor (VSS) measures the speed from the transmission output. A Wheel Speed Sensor (or ABS sensor) is located at each wheel and measures individual wheel rotation speed for the anti-lock brake and traction control systems. While they both measure speed, they serve different primary functions. However, on some modern cars, the main computer can use wheel speed sensor data to determine vehicle speed if the VSS fails.
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Technical Specifications
OEM Part Numbers: 24276627 24259852 24244593
The VSS for the 2012-2020 Malibu is typically a magnetic sensor that generates a signal based on the rotation of a reluctor wheel on the transmission's output shaft. There are distinct input and output sensors which are not interchangeable.
We Have This Part in Stock
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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