Acura RL Neutral Safety Switch Guide (1996-2012)
If your Acura RL won't start or has shifting problems, the neutral safety switch could be the culprit.
- A no-start condition is the most common symptom of a bad neutral safety switch.
- If your RL starts in any gear besides Park or Neutral, stop driving it immediately as it is a major safety risk.
- The check engine light with code P0705 is a strong indicator of a faulty transmission range sensor (neutral safety switch).
- Proper alignment of the new switch during installation is crucial for correct operation.
Understanding the Neutral Safety Switch in Your RL
The neutral safety switch, also known as a transmission range sensor, is a small but vital part of your Acura RL's automatic transmission system. Its primary role is safety: it physically blocks the starter from getting power if the gear selector is in Drive, Reverse, or any other gear besides Park or Neutral. Over time, this switch can wear out, get misaligned, or fail due to internal electrical problems, leading to a range of frustrating and potentially dangerous issues.
🎬 Watch: Fixing a car that won't crank without wiggling the shifterIs it an OEM or Aftermarket Part?
When replacing your RL's neutral safety switch, you have the choice between Original Equipment Manufacturer (OEM) and aftermarket parts. An OEM switch is the exact same part that Acura installed at the factory. Aftermarket parts are made by other companies to fit your vehicle. For a part like this, a quality aftermarket switch from a reputable brand can offer comparable performance to OEM at a lower cost. Brands like Standard Ignition and Rostra Powertrain are established names in the aftermarket, producing parts that are designed to meet or exceed original specifications. Economy brands like True Tech may offer a lower price point, but long-term reliability can be less certain.
Critical Safety Warning
If your RL starts in any gear other than Park or Neutral, it is a serious safety hazard. The vehicle can move unexpectedly, causing an accident. Do not drive the car and have the neutral safety switch inspected and replaced immediately.
Choosing the Right Aftermarket Switch
With several aftermarket options available, it's important to choose wisely. Here's a general breakdown of the brands mentioned:
- Standard Ignition (SMP): Often considered a premium aftermarket brand, Standard produces parts that are well-regarded for their quality and reliability, designed to be a direct-fit replacement for the original.
- Rostra Powertrain: Rostra is a known producer of vehicle electronics for both aftermarket and OE applications, engineering their parts with high-grade materials for durability and performance.
- True Tech: This brand typically falls into the economy or standard tier. While it can provide a cost-effective solution, it may not have the same level of engineering or long-term testing as more premium brands.
Pro Tip: The most common diagnostic trouble code (DTC) associated with a failing neutral safety switch is P0705, which indicates a malfunction in the transmission range sensor circuit. If your check engine light is on, getting the codes read is the first step in diagnosis.
🎬 See how to replace the switch and clear P0705 codesEstimated Costs
The cost to replace the neutral safety switch can vary. The part itself is relatively affordable, but labor can add to the total cost if you have a mechanic do the work.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Switch | $55 - $419 |
| New OEM Switch | $165 - $241 |
| Shop Labor | $100 - $200 |
| Total (DIY) | $55 - $419 |
| Total (Installed) | $155 - $619 |
Frequently Asked Questions
Is the neutral safety switch the same as a transmission range sensor?
Yes, for the Acura RL and many modern vehicles, these terms are used interchangeably. The component serves both the safety function (neutral safety) and the gear position information function (range sensor).
Can I just clean the switch instead of replacing it?
While some switch failures are due to dirt or corrosion on the external connectors, most issues are from internal wear or electrical faults. Cleaning the outside might provide a temporary fix if you're lucky, but replacement is the only reliable solution for a failing switch.
Does the new switch need to be adjusted?
Yes, proper alignment is critical. The switch must be installed so it correctly reads the position of the shift lever. If it's misaligned, you may still have starting issues or incorrect gear indication. Many replacement procedures involve aligning the switch while the transmission is in Neutral.
🎬 Follow this DIY walkthrough for proper switch alignment and installationWhat happens if I ignore a bad neutral safety switch?
Ignoring it can lead to several problems. You could get stranded if the car refuses to start. If the switch is shorted and allows the car to start in gear, you risk a serious accident. It can also cause erratic shifting and may put the transmission into a "limp mode," where it won't shift past 2nd gear.
Helpful Videos
Technical Specifications
OEM Part Numbers: 28900-RYF-023 28900-RJB-043 28900-RT4-003 28900-RJB-033 28900-P5D-003
The neutral safety switch on the Acura RL is located on the exterior of the transmission housing. It connects to the manual shift lever and has an electrical connector that sends gear position data to the vehicle's computers. Replacement requires accessing the side of the transmission, which may involve removing the battery and battery tray on some models to gain access.
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.
- Acura RL: