2019-2020 Subaru Forester Access Module: Programming, Keys, and Replacement Guide

Programming is Required: The Most Critical Step

Replacing the Vehicle Access Control Module in a 2019-2020 Subaru Forester is not a simple plug-and-play job. This module is a core part of the vehicle's anti-theft system and must be professionally programmed to the vehicle after installation. This process cannot be skipped, whether you are using a new or a used module.

Programming involves using specialized diagnostic equipment to register the new module to the vehicle's other computers and, just as importantly, to register all of your existing (and any new) key fobs to the new module. Once the module is replaced, it erases the memory of all previously known keys.

Who Can Program the Module?

• Subaru Dealerships: Dealers have the required Subaru Select Monitor (SSM4) diagnostic tool and direct access to Subaru's technical resources to perform the programming.
• Qualified Automotive Locksmiths: Many professional locksmiths have invested in advanced diagnostic tools and software subscriptions that allow them to program Subaru modules and keys. 🎬 Watch: How a locksmith programs a Subaru key fob They are often a more convenient and sometimes more affordable option than a dealership, as they can provide mobile service.
• Independent Repair Shops: Some, but not all, independent shops that specialize in Subaru or modern electronics may have the necessary equipment, like a J2534 pass-thru device and an SSM4 software subscription. However, the equipment and subscriptions are expensive, so not every shop will have this capability.

Symptoms of a Failing Access Module

Failure of the Vehicle Access Control Module can be intermittent at first and worsen over time. Common symptoms include:

• "Access Key Not Detected" Message: The most common symptom is the car failing to recognize a key fob that is known to have a good battery.
• Push-Button Start Fails: The vehicle may not start when the push-button is pressed, even with the brake pedal applied.
• Inconsistent Keyless Entry: The doors may not unlock when you touch the handle or lock when you press the sensor, even with the key fob nearby.
• Remote Functions Not Working: The lock, unlock, and trunk release buttons on the key fob may stop working.
• Security Light Issues: A flashing security indicator light on the dashboard can sometimes point to a problem with the immobilizer system controlled by this module.

In the event of a dead key fob battery or module failure, you can often still start the car by holding the key fob directly against the push-to-start button while pressing it. This uses a short-range antenna to read the key's chip, bypassing the longer-range detection.

Known Issues, TSBs, and Recalls

While there are no specific recalls for the Vehicle Access Control Module itself on the 2019-2020 Forester, several recalls exist for other electronic and safety systems. It's always wise to check if your vehicle has any open recalls by entering your VIN on the NHTSA website.

A Technical Service Bulletin (TSB) #15-327-25 was issued for some newer Subaru models, including the 2022-2025 Forester, to address a software issue where the keyless system might allow a door to be opened that isn't the one closest to the key. While this TSB does not officially cover the 2019-2020 models, it highlights the type of logic-based issues that can occur within these systems and be fixed with a software update.

Buying a Used Vehicle Access Control Module

Purchasing a used OEM module is an excellent way to save a significant amount of money compared to buying new from a dealer. Since the part requires programming regardless, a used unit functions identically to a new one once installed and coded to your vehicle.

What to Look For:

• Match the Part Number: This is the most important rule. You must match the OEM part number exactly. The known part numbers for the 2019-2020 Forester are 88801SJ020, 88801SJ021, 88801SJ022, 88801SJ023, and 88801SJ024. Newer numbers in the sequence often supersede older ones, with 88801SJ024 being the latest replacement for the previous versions.
• Inspect for Damage: Check the used part for any signs of physical damage, especially to the plastic casing and the connector pins. Avoid any modules that show evidence of water intrusion, corrosion, or being forcibly removed.
• Reputable Seller: Buy from a seller who offers a warranty and has a good return policy. This protects you in case you receive a defective part.

Cost Breakdown

The total cost of replacement involves the part itself and the labor for installation and programming. Labor for programming is required whether the part is new or used.

Frequently Asked Questions (FAQ)