Acura RSX Vehicle Speed Sensor (VSS) Guide for 2002-2006 Models
Is a bad vehicle speed sensor causing your RSX speedometer to act up? Here’s what you need to know.
- A faulty VSS is a common cause for an erratic speedometer and shifting issues on the 2002-2006 RSX.
- The replacement is a simple DIY job, located on the transmission and held by one 12mm bolt.
- High-quality aftermarket brands like Standard Ignition and Walker Products are considered reliable alternatives to the more expensive OEM part.
- Verify the correct OEM part number for your specific transmission (Manual vs. Auto, Base vs. Type-S) before buying.
Symptoms of a Failing Vehicle Speed Sensor
A bad vehicle speed sensor (VSS) is a common issue on the 2002-2006 Acura RSX. When it starts to fail, it can cause several noticeable problems. Being aware of these signs can help you diagnose the issue before it causes more trouble.
- Erratic or Dead Speedometer: The most obvious sign is a speedometer that jumps around randomly, reads zero while you're moving, 🎬 Learn how to recalibrate your gauge cluster to rule out dashboard issues. or doesn't work at all.
- Harsh or Incorrect Shifting (Automatic Models): If you have an automatic RSX, a bad VSS can cause the transmission to shift hard, late, or at the wrong times because it doesn't know the correct vehicle speed.
- Check Engine Light: A failing VSS will often trigger a Check Engine Light. Common trouble codes include P0500 (Vehicle Speed Sensor Malfunction) and P0720 (Output Speed Sensor Circuit Malfunction).
- Cruise Control Not Working: The cruise control system relies on the VSS to maintain a set speed. If the sensor fails, your cruise control will likely stop working.
- VTEC Not Engaging: The ECU needs to confirm the vehicle is moving (above a certain low speed) as one of the conditions to activate VTEC. A faulty VSS can prevent this, making the engine feel sluggish.
Physical Damage is Possible
In some rare cases on the RSX, internal transmission issues can cause a gear to make contact with the VSS, physically damaging it. If you replace a sensor and it fails again quickly, or you find the old one is scratched or broken, it could point to a more serious transmission problem.
Choosing the Right Aftermarket VSS for Your RSX
When replacing the VSS, you have a choice between OEM (Original Equipment Manufacturer) and aftermarket parts. For the RSX, many owners find that a high-quality aftermarket sensor works well and saves money. However, quality can vary between brands.
OEM Part Numbers:
- Manual Transmission (Type-S): 78410-S6M-N01
- Base Model 5-Speed (2002-2004): 78410-S7A-G01
Always verify the part number for your specific year and transmission (manual vs. automatic, Base vs. Type-S) before ordering.
Aftermarket Brand Tiers:
- Premium Aftermarket (Standard Ignition, Walker Products): Brands like Standard Motor Products (SMP) and Walker Products are generally well-regarded in the aftermarket for engine management components. They often manufacture parts to meet or exceed OE specifications and perform extensive testing. These are a solid choice for a reliable repair without the full cost of an OEM part.
- Standard Aftermarket (Holstein): Holstein is another option that focuses on matching OE quality and offers a good warranty. While specific reviews for the RSX VSS are sparse, they are a known manufacturer in the sensor market.
- Value-Oriented (Global Parts, Store Brands): These are the most budget-friendly options. While they can work, the quality and longevity can be inconsistent. For a critical sensor like the VSS, it's often worth spending a little more to avoid having to do the job twice.
Pro Tip: OEM vs. Aftermarket
Many forum users and DIYers have had success with quality aftermarket sensors for the RSX. However, if you want the highest assurance of compatibility and longevity, the genuine Acura/Honda OEM part is the benchmark. An OEM sensor costs around $100, while aftermarket options offer significant savings.
Cost to Replace an Acura RSX Vehicle Speed Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Part | $40 - $198 |
| New OEM Part | $100 - $220 |
| Shop Labor | $60 - $120 |
| Total Professional Replacement | $100 - $418 (depending on part choice) |
Frequently Asked Questions (FAQ)
Where is the vehicle speed sensor located on the 2002-2006 Acura RSX?
The VSS is located on the top/back of the transmission housing. To access it, you will likely need to remove the air intake box. It is held in place by a single 12mm bolt.
🎬 See exactly where the VSS is located on the transmission.Can I replace the VSS myself?
Yes, this is a very DIY-friendly job for someone with basic tools. It involves removing the air intake for access, unplugging the electrical connector, removing one 12mm bolt, and carefully pulling the old sensor out. The old sensor can sometimes be stuck, requiring gentle persuasion with pliers or a screwdriver. The entire job can usually be done in under an hour.
🎬 Watch this step-by-step guide to replacing your RSX speed sensor.Are there any recalls for the Acura RSX speed sensor?
No, there are no specific recalls from the NHTSA for the vehicle speed sensor on the 2002-2006 Acura RSX. Searches for recalls and Technical Service Bulletins (TSBs) related to the VSS did not return any official documents.
What's the difference between a Vehicle Speed Sensor and an ABS Wheel Speed Sensor?
The Vehicle Speed Sensor (VSS) on the RSX is mounted on the transmission and primarily measures speed for the speedometer and transmission control. ABS Wheel Speed Sensors are located at each wheel and are used by the Anti-lock Braking System (ABS) to detect wheel lock-up during braking. While they both measure speed, they serve different systems.
My speedometer stopped working after I used engine degreaser. Did I ruin the sensor?
It's possible. Some owners have reported VSS failure after washing the engine bay or using degreaser. The sensor's location makes it susceptible to moisture and chemicals if not properly sealed. If your problems started right after cleaning, the sensor or its electrical connector may have been damaged.
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Technical Specifications
OEM Part Numbers: 78410-S6M-N01 78410-S7A-G01
Located on transmission housing. Typically secured by one 12mm bolt. Uses a 3-wire electrical connector.
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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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