Guide to the 2005-2018 Nissan Frontier Automatic Transmission Speed Sensor
Experiencing erratic shifting or a faulty speedometer in your Frontier? Your transmission speed sensor might be the culprit.
- Check for the 'strawberry milkshake of death' (coolant in transmission fluid) on 2005-2010 models before replacing sensors.
- A bad speedometer is the key symptom of a failed OUTPUT sensor (VSS), which is the easier one to replace.
- Common fault codes are P0720 for the output sensor and P0717 for the input sensor.
- Hitachi is an OEM-level quality replacement, making it a top choice for reliability.
Understanding Transmission Speed Sensor Failure in Your Frontier
If you own a 2005 to 2018 Nissan Frontier, you might eventually face issues with your automatic transmission. 🎬 Watch a breakdown of common Nissan Frontier mechanical problems. While several problems can arise, a failing transmission speed sensor is a common and relatively straightforward fix. These sensors tell the truck's computer how fast to shift gears. When a sensor goes bad, the computer gets confusing information, leading to noticeable driving problems.
A Critical Note on Radiator and Transmission Health
For 2005-2010 Frontier models, a well-known issue is the potential for the radiator to fail internally, allowing coolant to mix with transmission fluid. This creates a damaging sludge often called the "strawberry milkshake of death" which can destroy the transmission and its electronic components, including the speed sensors. Before replacing a sensor, it's wise to check your transmission fluid. If it appears pink, milky, or contaminated, you have a larger problem that a new sensor will not fix. Addressing the radiator and transmission contamination is the first priority.
Symptoms of a Failing Speed Sensor
A bad speed sensor can make your truck behave unpredictably. Here are the most common signs:
🎬 See a video guide on identifying bad speed sensor symptoms.- Erratic Shifting: The transmission may shift harshly, delay shifts, or get stuck in one gear (known as "limp mode").
- Faulty Speedometer: The speedometer may jump around, show an incorrect speed, or stop working altogether.
- Check Engine Light: A failing sensor will often trigger a Check Engine Light. Common trouble codes include P0717 (Input Speed Sensor Circuit) and P0720 (Output Speed Sensor Circuit).
- Cruise Control Failure: The cruise control system relies on accurate speed readings and will not work if the sensor is faulty.
Choosing the Right Aftermarket Speed Sensor
When replacing a failed sensor, you have options. While OEM parts are available, quality aftermarket brands offer a reliable and cost-effective alternative. For the Nissan Frontier, two prominent aftermarket brands are Hitachi and NGK (under their NTK sensor brand).
Pro Tip: The 2005-2018 Frontier has two main speed sensors. The Output Speed Sensor (VSS) is located on the outside of the transmission housing and is typically easier to replace. The Input Speed Sensor (Turbine Sensor) on many of these models is located inside the transmission oil pan, as part of the valve body assembly, making it a much more involved job. 🎬 Learn how to locate and fix internal valve body sensors. Most common symptoms like a bad speedometer are related to the external output sensor.
| Brand | Reputation & Quality | Notes for Frontier Owners |
|---|---|---|
| Hitachi | Excellent. Hitachi is a well-respected Japanese manufacturer and is often the Original Equipment Manufacturer (OEM) for Nissan's electronic parts. Choosing Hitachi is very close to buying the genuine Nissan part without the dealer packaging. | A highly recommended choice for a direct-fit, reliable replacement. Often considered the top-tier aftermarket option. |
| NGK (NTK) | Very Good. While famous for spark plugs, NGK's sensor brand, NTK, produces high-quality sensors that meet or exceed OE specifications. They are known for robust construction and rigorous testing. | A strong and reliable alternative to Hitachi. If a Hitachi sensor is unavailable, an NTK sensor is a trustworthy second option. |
Cost of Replacing a Transmission Speed Sensor
The cost can vary depending on the part brand and whether you do the work yourself. The external output sensor is a feasible DIY project for those with basic tools.
| Item | Cost Range |
|---|---|
| New Aftermarket Part (Hitachi, NGK) | $94.78 - $281.91 |
| New OEM Part | $150 - $300+ |
| Shop Labor | $75 - $150 |
Frequently Asked Questions
Which sensor do I need, input or output?
If your speedometer is malfunctioning and you have a P0720 code, you almost certainly need the output speed sensor (VSS). If you only have shifting problems and a P0717 code, the issue might be the input sensor, which is a more complex job as it's often inside the transmission.
Is it difficult to replace the output speed sensor myself?
For most mechanically inclined owners, it is not difficult. The output sensor is usually located on the exterior of the transmission case, held by a single 10mm bolt. Access can be tight, but it typically involves unplugging the electrical connector, removing the bolt, and swapping the sensor. The job can often be done in under an hour.
Are there any recalls for the Frontier's speed sensors?
There are no specific recalls for the automatic transmission speed sensors on the 2005-2018 Nissan Frontier. Recalls found for this vehicle's transmission relate to the parking pawl on newer 2020-2023 models, which is a separate issue.
What happens if I don't replace a bad speed sensor?
Continuing to drive with a faulty speed sensor is not recommended. You will experience poor fuel economy, unpredictable shifting, and the lack of a functioning speedometer is a safety hazard. In some cases, harsh shifting can cause additional wear on internal transmission components.
Helpful Videos
Technical Specifications
OEM Part Numbers: 31935-1XJ0A 31935-97X00 31935-1XJ0D
The primary replacement part is the Output Vehicle Speed Sensor (VSS), typically mounted externally on the transmission housing with a single bolt and a 2-pin electrical connector.
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.
- Nissan Frontier: