1998 Subaru Forester Keyless Entry & Security Module Guide
Solve your 1998 Forester's power lock and remote problems by understanding, diagnosing, and replacing the correct control module.
- The correct part is the Keyless Entry/Security Module (P/N: H7110AS010), not a modern 'BCM'.
- This module is plug-and-play and does NOT require dealer programming; only the key fobs need to be re-synced, which is a simple DIY procedure.
- Failure symptoms include erratic power locks, non-working remotes, and blown fuses for the lock system.
- A used OEM module is the only replacement option, as new parts are discontinued.
Symptoms of a Failing 1998 Forester Keyless Entry Module
When the keyless entry module begins to fail, it can cause a variety of electrical issues. Unlike a single bad door lock actuator that affects only one door, a failing module will typically cause problems with the entire system. Be on the lookout for these common signs:
- Intermittent or Total Failure of Key Fobs: Your keyless entry remotes may stop working suddenly or only work sporadically. You might find yourself pressing the buttons multiple times with no response, even after replacing the battery in the fob.
- Erratic Power Door Lock Behavior: The door locks may cycle on their own, locking and unlocking randomly while you are driving or when the vehicle is parked. This can be a confusing and concerning symptom that points directly to a fault in the control logic of the module.
- Power Locks Not Working from Interior Switch: If the power lock button inside the car also fails to lock or unlock all doors, it further suggests the problem lies with the central control module rather than an individual switch or actuator.
- Repeatedly Blown Fuses: A short circuit inside the module can cause the fuse that protects the power lock circuit to blow repeatedly. If you replace the fuse and it blows again as soon as you try to use the locks, the module is a likely culprit.
Pro Tip: Before condemning the module, always start with the basics. Replace the battery in your key fob 🎬 Watch: How to replace your Forester key fob battery and check the fuse for the power door locks in the vehicle's fuse panel. Sometimes the simplest fix is the right one.
Buying a Used Keyless Entry Module for Your 1998 Forester
Since new OEM modules are no longer produced for this vehicle, a quality used OEM part is the best and most cost-effective solution. Aftermarket options are not available. Here’s what you need to know to buy the right part.
1. Verify the Part Number
The most critical step is to match the part number exactly. For the 1998 Subaru Forester, the correct Keyless Entry / Security Control Module part number is typically H7110AS010. Do not rely on visual appearance alone. You must confirm the number on your original module before ordering a replacement.
Warning: Part numbers like 31711AD660 or A64-000 D1G are sometimes incorrectly associated with this part online. 31711AD660 is a Transmission Control Module, and A64-000 D1G is a Nissan part. Installing the wrong module will not work.
2. Physical Inspection
When buying a used module, inspect it for any signs of physical damage. Look for:
- Corrosion: Green or white crust on the pins or circuit board indicates water damage. Do not buy a module with any signs of corrosion.
- Cracked Casing: Check for cracks or damage to the plastic housing, which could suggest it was handled roughly or exposed to stress.
- Burnt Smell: A burnt electronic smell is a clear sign of an internal short circuit.
3. Why Used OEM is the Only Choice
For a vehicle of this age, used OEM (Original Equipment Manufacturer) parts are often the only option. These parts were designed specifically for your vehicle, ensuring perfect fitment and function. A used OEM module that has been tested and comes with a warranty from a reputable seller is a reliable and affordable way to get your Forester's electronics working correctly again.
Programming and Installation
Does the module need to be programmed?
No. Unlike modern vehicles, the Keyless Entry Module for a 1998 Forester is plug-and-play. It is not coded to your vehicle's VIN and does not require any special programming or a visit to the dealership. You can simply swap the old module with a used one that has the same part number.
Programming Your Key Fobs (DIY)
After you install the replacement module, you will need to program your existing key fobs to it. This is a very simple process you can do yourself in about a minute.
- Open the driver's side door.
- Turn the ignition key to the 'ON' position (but do not start the engine).
- Locate the small, recessed programming button. It is usually under the driver's side dashboard, near the fuse panel or steering column.
- Press and hold the programming button for about 15 seconds, or until you hear the door locks cycle three times. 🎬 Watch this video to see the programming button in action
- While still holding the button, press the 'LOCK' button on the first remote you want to program. The door locks will cycle once to confirm it has been learned.
- Repeat the previous step for any additional remotes.
- Release the programming button and remove the key from the ignition to exit programming mode.
- Test all your remotes to ensure they are working correctly. 🎬 See this walkthrough for programming older Subaru remotes
Cost of Replacing a 1998 Forester Keyless Entry Module
Here is an estimated cost breakdown for replacing the module. Prices can vary based on your location and the parts supplier.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Module | Discontinued/Not Available |
| New Aftermarket Module | Not Available |
| Used OEM Module | $40 - $100 |
| Remanufactured Module | Not Available |
| Shop Labor | $75 - $180 (0.5-1.0 hours) |
Frequently Asked Questions (FAQ)
Where is the keyless entry module located on a 1998 Forester?
The module is located under the dashboard on the driver's side. You will typically need to remove the lower dash panel beneath the steering wheel to access it. It is a small black plastic box with one or two wiring connectors.
Will replacing this module fix my car's immobilizer?
The 1998 US-market Subaru Forester does not have a transponder-based immobilizer system that prevents the engine from starting. The 'anti-theft' function of this module is related to the alarm and door locks. Swapping this module will not affect the car's ability to start.
Can I just fix my old module?
In some cases, failure is due to simple issues like cracked solder joints on the circuit board, which can be repaired by someone skilled in electronics. However, diagnosing the specific point of failure can be difficult, and internal component failure is common. For most people, replacing the entire unit with a functional used part is a faster and more reliable repair.
My power locks don't work, but my key fob does. Is it the module?
If the key fob operates the locks but the interior switch does not, the problem is more likely to be the switch itself or the wiring leading to it, rather than the control module.
Helpful Videos
Technical Specifications
OEM Part Numbers: H7110AS010
Controls power locks and keyless entry functions. Operates on the vehicle's 12V DC system.
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.
- Subaru Forester:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing 1998 Forester Keyless Entry Module
- Buying a Used Keyless Entry Module for Your 1998 Forester
- 1. Verify the Part Number
- 2. Physical Inspection
- 3. Why Used OEM is the Only Choice
- Programming and Installation
- Does the module need to be programmed?
- Programming Your Key Fobs (DIY)
- Cost of Replacing a 1998 Forester Keyless Entry Module
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off