2008-2012 Acura RDX Driver Memory Module: Fixing Seat & Mirror Problems
Your guide to diagnosing, replacing, and understanding the memory seat and mirror control unit in your first-generation Acura RDX.
- This module is only for 2008-2012 RDX models factory-equipped with the memory seat/mirror option.
- Replacement is plug-and-play; no special dealer programming is required.
- Common symptoms include failure to save settings and unresponsive buttons on the door panel.
- Before replacing the module, try a system reset by holding the '1' and '2' buttons simultaneously.
Symptoms of a Failing Driver Memory Control Module
When the memory module begins to fail, the issues are typically related to convenience rather than vehicle operation. You will still be able to manually adjust your seat and mirrors. Here are the most common signs of a problem:
- Memory settings are not saved: You go through the process of setting your seat and mirror position, but the module doesn't retain the settings.
- Memory buttons are unresponsive: Pressing the 'SET', '1', or '2' buttons on the door panel does nothing, and they may not light up.
- Seat and mirrors move to the wrong position: When you unlock the car, the seat or mirrors move to an incorrect or random position instead of your saved setting.
- Function is intermittent: The memory recall works sometimes but fails at other times, without a clear pattern.
- Loss of memory after battery disconnect: While a reset is often needed after a battery change, a faulty module may consistently fail to re-learn settings.
Pro Tip: Before assuming the module is bad, try a system reset. With the ignition on, press and hold both the '1' and '2' memory buttons simultaneously for a few seconds. This can sometimes resolve a software glitch. Also, ensure your car battery is fully charged, as low voltage can cause erratic behavior in various electronic modules.
Known Issues, TSBs, and Recalls
For the 2008-2012 Acura RDX, there are no specific recalls or Technical Service Bulletins (TSBs) issued by Acura or the NHTSA that directly address the Driver Memory Control Module (part number 38850-STK-A02). The primary recalls for this generation RDX concern the Takata airbag inflators. Most reported issues are from individual owners on forums, pointing to intermittent failures or the need for a system reset after a loss of battery power.
Is Programming Required for a Replacement Module?
No, a replacement Driver Memory Control Module for a 2008-2012 Acura RDX is typically plug-and-play and does not require special programming or a visit to the dealership. The memory settings are stored within the module itself. After installing a new or used replacement, you will simply need to perform the standard memory setting procedure as outlined in the owner's manual to save your seat and mirror positions to the '1' and '2' buttons and link them to your key fobs.
Buying a Used Driver Memory Control Module
Purchasing a used OEM module is a cost-effective way to restore the memory functions in your RDX. Since quality aftermarket options are not available for this specific part, a tested, recycled OEM unit is the best choice.
How to Buy the Right Part:
- Verify Compatibility: This module is only for RDX models originally equipped with the driver memory seat and mirror feature. Before ordering, check your driver's door panel for the 'SET', '1', and '2' buttons. If your vehicle does not have these buttons, this part is not compatible.
- Match the Part Number: The correct OEM part number is 38850-STK-A02. Ensure the used part you are buying has this exact number on its label. While other Acura models have similar modules, they are not interchangeable.
- Physical Inspection: When you receive the part, inspect the plastic casing for cracks or signs of heat damage. Most importantly, check the electrical connector pins to ensure they are straight, clean, and free of any green or white corrosion, which would indicate water damage.
Replacement Overview
The Driver Memory Control Module is located underneath the driver's seat, attached to the seat frame. Replacement is straightforward for those with basic mechanical skills.
- Disconnect the Battery: Before working on any electronic component, disconnect the negative terminal of your car's battery to prevent short circuits.
- Remove the Driver's Seat: You will need to unbolt the driver's seat from the floor of the vehicle. There are typically four bolts holding it in place, often covered by plastic trim pieces.
- Access the Module: Carefully tilt the seat back or remove it from the vehicle to gain access to the wiring and modules underneath. Locate the memory control module (confirm by part number).
- Swap the Module: Disconnect the electrical harness from the old module and unbolt or unclip it from the seat frame. Install the new module in its place and reconnect the harness.
- Reinstall and Test: Reinstall the driver's seat, reconnect the battery, and then follow the procedure in your owner's manual to program your seating positions.
Cost of Replacement
The cost to replace the Driver Memory Control Module can vary significantly depending on the source of the part.
| Part Source | Estimated Cost |
|---|---|
| New OEM | $120 - $175 |
| Used OEM | $50 - $90 |
| New Aftermarket | Not Available |
| Shop Labor | $100 - $200 (1-1.5 hours) |
Frequently Asked Questions (FAQ)
Where is the Driver Memory Control Module located on a 2008-2012 Acura RDX?
The module is mounted to the bottom of the driver's seat frame. You must unbolt and tilt or remove the seat to access it.
Does a used memory module need to be programmed by a dealer?
No, this module does not require dealer programming. It is a plug-and-play part. After installation, you will need to set your seat/mirror preferences using the buttons on the door, just as you did when the car was new.
My memory seats stopped working after I replaced the battery. Is the module broken?
Not necessarily. It's common for the system to need a reset after a complete loss of power. First, try the reset procedure of holding the '1' and '2' buttons together. If that doesn't work, attempt to re-save your settings by adjusting the seat, pressing 'SET', and then pressing and holding '1' or '2' until you hear two beeps. If it still won't save, the module may have failed.
Can I add memory seats to my base model RDX by installing this module?
No. Adding this feature would be a complex and expensive project. It would require not only this module but also the correct seat with position sensors, the door panel switch, and extensive wiring that is not present in a non-memory vehicle.
Technical Specifications
OEM Part Numbers: 38850-STK-A02 38850STKA02
Controls driver's seat and side mirror memory positions for two drivers. Links to key fobs for automatic recall.
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 RDX:
- 🛍️ Shop This Part
- Symptoms of a Failing Driver Memory Control Module
- Known Issues, TSBs, and Recalls
- Is Programming Required for a Replacement Module?
- Buying a Used Driver Memory Control Module
- How to Buy the Right Part:
- Replacement Overview
- Cost of Replacement
- Frequently Asked Questions (FAQ)
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