1999 Subaru Forester Keyless Entry & Security Module: A DIY Replacement Guide
Diagnose failing door locks and alarm issues, and learn why this module is a simple DIY replacement that doesn't require expensive dealer programming.
- The 1999 Forester does NOT have a modern chipped key or immobilizer, making replacement much simpler.
- A replacement Keyless Entry Module is PLUG-AND-PLAY and does not require dealer programming.
- You must reprogram your existing key fobs to the new module, which is a simple DIY procedure.
- Always match the part number from your original module exactly when buying a used replacement.
Symptoms of a Failing 1999 Forester Keyless Entry Module
When the keyless entry module begins to fail, you'll notice problems specifically related to the door locks and alarm system. Because this module is not deeply integrated with other vehicle systems, a failure typically won't cause check engine lights or issues with how the car drives.
- Remote Key Fobs Stop Working: The most common symptom is when your key fobs suddenly stop locking or unlocking the doors, even after replacing the fob's battery. 🎬 See how to quickly replace your key fob battery yourself.
- Erratic Power Door Lock Behavior: Doors may lock or unlock on their own, or the power lock switches inside the car may work intermittently or not at all.
- Factory Alarm Malfunctions: The alarm may trigger for no reason, or you may be unable to arm or disarm it with the remote. In some cases, this can lead to a no-start condition if the alarm's starter-disable feature is active and cannot be turned off.
- Parking Lights Flash Uncontrollably: After disconnecting and reconnecting the vehicle's battery, the parking lights may begin to flash and cannot be stopped by pressing the remote button, indicating a fault in the security module. 🎬 Watch this video to stop your alarm and lights from flashing.
- Unusual Electrical Issues: Some owners have reported a combination of failures—such as the speedometer, power windows, and turn signals all failing at once—which may be related to a shared power source or a more integrated control unit connected to the security system.
Pro Tip: Before assuming the module is bad, check all related fuses in the interior and under-hood fuse boxes. A forum user reported that a main 80-amp fuse failure caused a widespread electrical outage that appeared to be a module failure.
CRITICAL: Programming and Immobilizer Information
This is the most important section for anyone considering a replacement. For this specific vehicle, the process is much simpler than on newer cars.
Does the 1999 Forester have an immobilizer chip in the key?
No. The standard US-market 1999 Subaru Forester does not use a transponder chip inside the ignition key. It has a security system that can prevent the engine from starting, but it is not tied to a specific, electronically-chipped key. This makes module replacement significantly easier and less expensive.
Does a replacement Keyless Entry Module need to be programmed?
No, the module itself is plug-and-play. You do not need a dealer or locksmith to program the replacement module to the vehicle. You can install a used module from another 1999 Forester, and it will be compatible. However, you will need to program your existing key fobs to communicate with the newly installed module. This is a simple procedure you can do yourself in a few minutes.
How to Program Your Key Fobs to the Module
You can pair up to four remotes to the module. You will need all of your remotes present to program them at the same time.
- Locate the Programming Button: The button is located under the driver's side dashboard, often near the steering column or diagnostic port. It is a small, typically recessed button.
- Enter Programming Mode: Open the driver's door. Insert the key into the ignition and turn it to the ON position (do not start the engine).
- Activate the Module: Press and hold the programming button. After about 15 seconds, the door locks should cycle (lock and unlock) three times. Continue to hold the button.
- Program Each Remote: While still holding the programming button, press the LOCK button on your first remote. The doors will cycle once to confirm it has been learned. Repeat this step for any additional remotes.
- Exit Programming Mode: Once all remotes are programmed, release the programming button and remove the key from the ignition. Test each remote to ensure it works correctly. 🎬 Watch a step-by-step walkthrough of this remote programming procedure.
Buying a Used 1999 Forester Keyless Entry Module
Since this module is plug-and-play, a used OEM unit is an excellent and cost-effective solution. Aftermarket options often involve complicated wiring, while a used original part is a direct swap.
- Match the Part Number: The most critical step is to match the part number exactly. Remove your original module and find the number printed on the label. There can be several variations, and only an exact match is guaranteed to work correctly.
- Inspect for Damage: Check the used module for any signs of physical damage, especially corrosion on the pins or water marks on the casing. These modules are located under the dash and can sometimes be exposed to moisture from a leaking windshield or firewall grommet.
- Source from a Reputable Seller: Purchase from a seller that offers a warranty and a return policy. This protects you in case the part is dead on arrival.
Replacement Cost Comparison
The cost to replace the keyless entry module is very reasonable, especially if you perform the labor yourself.
| Part Source | Estimated Cost |
|---|---|
| New OEM | $150 - $300+ (May be discontinued) |
| New Aftermarket (Full Kit) | $40 - $100 |
| Used OEM | $25 - $75 |
| Shop Labor | $60 - $120 |
Frequently Asked Questions (FAQ)
Does the 1999 Forester have a Body Control Module (BCM)?
Not in the modern sense. The 1999 Forester uses multiple separate electronic modules for different functions rather than one central BCM. The Keyless Entry & Security Module is the part that controls the remote locks and alarm.
Where is the keyless entry module located on a 1999 Forester?
It is located under the driver's side dashboard. You will likely need to remove the lower dash panel beneath the steering wheel to access it. It is a small plastic box with one or two wiring connectors.
Can a locksmith program this module?
A locksmith is not needed. The module itself does not require programming. You can easily program your own remote key fobs to the module at home using the simple steps outlined in this guide.
My key fob battery is new, but it still doesn't work. Is the module bad?
It's possible, but first, try reprogramming all of your remotes to the module. Sometimes the module can lose its memory, especially after a battery disconnect. If the reprogramming procedure fails to work, the module itself is the likely culprit.
Helpful Videos
Technical Specifications
OEM Part Numbers: H7110AS010 H7110AS011
Controls power locks and security system. Communicates with remote key fobs (e.g., A269ZUA111).
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 1999 Forester Keyless Entry Module
- CRITICAL: Programming and Immobilizer Information
- Does the 1999 Forester have an immobilizer chip in the key?
- Does a replacement Keyless Entry Module need to be programmed?
- How to Program Your Key Fobs to the Module
- Buying a Used 1999 Forester Keyless Entry Module
- Replacement Cost Comparison
- Frequently Asked Questions (FAQ)
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