2024-2025 Subaru Impreza & Crosstrek Headlight Control Module Guide
Understanding the function, failure symptoms, and critical replacement requirements for the headlight control module in your 2024-2025 Impreza or Crosstrek.
- This module (part #84051FN110) is for 2024-2025 Impreza & Crosstrek models with Steering Responsive Headlights (SRH).
- Replacement requires mandatory programming/initialization by a dealer or a qualified shop with Subaru-specific tools.
- Failure symptoms include an 'SRH OFF' warning light, headlights not swiveling, and intermittent or total headlight failure.
- Buying a used OEM module is a viable option, but you must factor in the cost of professional programming to complete the repair.
Symptoms of a Failing Headlight Control Module
When the headlight control module begins to fail, it can cause a range of issues from annoying to dangerous. Because it's an electronic component, symptoms can be intermittent at first. Here are the most common signs that your module may be the problem:
- Steering Responsive Headlight (SRH) Warning Light: The most direct indicator is a flashing "SRH OFF" or a headlight symbol with an exclamation point on your dashboard. 🎬 Watch: Learn why your Subaru SRH warning light is on This means the system has detected a fault and has been disabled.
- Headlights Don't Swivel: The most obvious functional symptom is that the headlights no longer turn with the steering wheel on curves.
- One or Both Headlights Inoperative: The module controls power to the headlights, and a failure can prevent one or both lights from turning on, even if the bulbs are good.
- Intermittent Flickering: Headlights may flicker, pulse, or turn on and off randomly. This can point to the module struggling to provide stable power.
- Headlights Stuck in One Position: The system may fail to switch between high and low beams, or the automatic leveling feature may stop working.
- Issues After a Battery Change or Jump-Start: A very low or dead battery can sometimes cause the module to lose its calibration, triggering warning lights even after the battery is replaced.
Pro Tip: Before assuming the module is bad, check the basics. Ensure the SRH system hasn't been accidentally turned off via the dashboard button or vehicle settings menu. 🎬 Watch: How to turn your steering responsive headlights on and off Also, check headlight fuses and bulbs to rule out simpler issues.
Known Issues, TSBs, and Recalls
As of now, there are no specific recalls or widespread Technical Service Bulletins (TSBs) for the 84051FN110 headlight control module in the 2024-2025 Impreza and Crosstrek. However, some owners of 2024 models have reported general headlight concerns, such as shadows in the beam pattern and what they perceive as poor low-beam visibility, which seem to be characteristics of the headlight assembly design itself rather than a module failure. A TSB (07-206-22R) was issued for a different module on the 2022 BRZ to address an inaccurate fault code (B2919) during certain driving conditions, showing that Subaru does refine these systems. It's worth noting that a recall was issued for 2017-2019 Impreza models due to improperly manufactured headlight reflectors, but this does not involve the control module or the 2024-2025 generation.
Programming and Calibration: A Critical Step
This is the most important factor to consider when replacing this module. A new or used headlight control module MUST be initialized or programmed to the vehicle after installation. This is not a simple plug-and-play part. The procedure syncs the module with the vehicle's other computers and calibrates the headlight leveling and steering responsive systems.
Failure to perform this step will result in the system not working and persistent warning lights on the dash. 🎬 Watch: How to troubleshoot and fix the SRH disabled warning While a Subaru dealer is equipped to do this, some independent shops with advanced diagnostic tools like a Subaru Select Monitor or equivalent may also be able to perform the initialization. However, you must confirm this with the shop beforehand. This programming requirement is common for modern, complex lighting modules.
Warning: Do not assume you can install this module and drive without programming. The Steering Responsive Headlight system will be inoperative, which is a key safety feature. Factor the cost of professional programming into your total repair budget.
Buying a Used Headlight Control Module
For a new vehicle like the 2024-2025 Impreza or Crosstrek, a used OEM module can be a smart, cost-effective alternative to a brand-new part from the dealer. Since these modules are not known to be a common failure item, a used part from a low-mileage vehicle is likely to have a long service life. Here’s what to look for:
- Verify the Part Number: It is critical to match the part number exactly. For these vehicles, the correct number is 84051FN110. Using a module with a different part number will likely result in incompatibility.
- Inspect for Damage: When you receive the part, check the housing for any cracks or signs of physical damage. Most importantly, inspect the connector pins for any corrosion (green or white powder) or water stains, which would indicate the part is compromised.
- Buy from a Reputable Seller: Purchase from a seller that offers a warranty. This gives you protection in case the part is dead on arrival.
- Remember the Programming Cost: A used module will still require the same dealer or specialist programming as a new one. The money you save on the part itself helps offset this necessary labor cost.
Cost Comparison
Prices can vary based on location and availability. The following is an estimated breakdown of costs:
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Dealer) | $195 - $295 |
| New Aftermarket | Not Yet Available |
| Used OEM | $40 - $150 |
| Shop Labor (Installation & Programming) | $170 - $250 |
Frequently Asked Questions (FAQ)
Do I need this specific module for my Impreza or Crosstrek?
This module, part number 84051FN110, is for 2024-2025 Subaru Impreza and Crosstrek models equipped with Steering Responsive Headlights (SRH). If your vehicle does not have this feature, it will use a different lighting setup.
Will my headlights work at all if the control module fails?
It depends on the failure mode. You might lose only the steering-responsive function, or you could lose all function in one or both headlights. Because of this unpredictability, it's a safety issue that should be addressed promptly.
Can I replace the module myself?
Physically replacing the module is often straightforward for a DIY mechanic, as it's typically located in an accessible area like behind the glovebox or under the dashboard. However, the mandatory post-installation programming requires specialized tools, meaning a trip to a dealer or qualified shop is almost always necessary to complete the job.
What OBD-II codes are associated with a failing headlight control module?
Standard OBD-II scanners may not read these codes. A more advanced tool is needed to check the Body Control Module (BCM) and related systems. Codes related to this system often start with a 'B' or 'U', such as U0140 (Lost Communication With Body Control Module) or specific codes like B2900, B2904, or B2905 which point to errors in the auto headlight beam leveler system that this module controls.
Helpful Videos
Technical Specifications
OEM Part Numbers: 84051FN110
Controls Steering Responsive Headlights (SRH) and Auto Headlight Beam Leveler 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 Impreza:
- Subaru Crosstrek: