This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
full bulletin at NHTSA ↗2005 Subaru Legacy electrical problems
severe 23 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
23
Recalls
0
Avg fix
$850
1crash
3fires
When does it fail?
Of the 23 electrical complaints filed for the 2005 Subaru Legacy, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA electrical complaint has been filed on this vehicle in over 13 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin contains information to help when attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully
full bulletin at NHTSA ↗This Service Information Bulletin was developed to provide interim guidance for 2026 model year vehicles exhibiting DTC B2A20 with gen 4 Telematics.
full bulletin at NHTSA ↗This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.
full bulletin at NHTSA ↗This Subaru service and technical support line newsletter provides information on the next phase of TechShare.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Rear hatch wiring is the dominant complaint across these 23 reports. Wagons are hit hardest: owners describe wires in the flexible accordion boot connecting the hatch to the body snapping from normal opening-and-closing cycles. The wires are undersized and routed under tension, so they break and short out. Affected systems include rear wipers, brake lights, tail lights, license plate lights, backup lights, rear defrost, hatch locks, and radio antennas. One owner documented three repair attempts (2011, 2013, twice in 2013) that still haven't resolved the issue—strong evidence of a design flaw, not wear.
A handful of owners hit more serious failures. One car lost all interior and exterior lights while driving at highway speed in a canyon; lights came back after restart, but the dealership couldn't diagnose it. Two owners reported fires—one in a heated driver seat that burned the seat completely; another where the map light area and headliner caught fire during start-up. A third owner experienced sudden unintended acceleration tied to conflicting throttle position sensor readings (diagnostic code P2138), a failure he says is common and dangerous.
One owner's airbag failed to deploy in a frontal collision. Electrical gremlins also surfaced: a CD player that turns itself on with the radio, and a gear shift that won't lock in place, preventing the car from starting on inclines.
Most dealers either can't replicate the faults or refuse to acknowledge them as defects.
Same Subaru Legacy electrical reports on nearby years: 2006
Failure modes owners describe
Rear hatch wiring harness fracture
Wires in the flexible rubber boot/accordion grommet connecting the rear hatch to the vehicle body break and crack from repeated bending during normal hatch opening and closing. Wires are undersized and routed with poor geometry, placing them under constant tension. Owners report multiple repair attempts that fail to resolve the underlying design defect.
When: Occurs during ownership; one owner cited repairs in 2/22/11, 3/24/13, 9/25/13; another at 105,000 miles; timing varies
Symptoms owners cite: Rear wiper inoperable or intermittent; Rear brake lights and tail lights non-functional; License plate lights not working; Rear hatch lock/locking mechanism fails; Center high-mounted stop light fails; Rear defroster inoperable; Backup lights non-functional; Radio antenna non-functional
Repairs/costs cited: Mechanic diagnosis of broken wires in harness; spliced or replaced wires as temporary/permanent fix. Owners note multiple repair cycles suggest design issue, not wear item.
All-lights electrical dropout while driving
Interior and exterior lights shut off suddenly while vehicle is in motion, then restore after vehicle shutdown and restart. Occurs without warning. Dealership unable to reproduce the failure for diagnosis. Cruise control flickering and malfunction accompanied early occurrence.
When: Approximately 2,000 miles on the vehicle (brand new)
Symptoms owners cite: Dashboard lights flicker; Cruise control fails to increase/decrease speed, then stops working entirely; All interior and exterior lights cut off simultaneously; Lights restore after vehicle restart
Repairs/costs cited: Dealership stated unable to diagnose without reproducing failure; owner also reported separate valve body problem and transmission issue diagnosed same month
Accelerator pedal position (APP) sensor disagreement
Throttle-by-wire sensors report conflicting pedal position data, triggering Check Engine light and engine power loss. Owner code-read P2138 indicating APP sensor 1 and APP sensor 2 disagree more than 4.5% for less than 1 second. Can cause sudden engine surge forward without pedal input, creating uncontrolled acceleration hazard. Multiple owners report this as common problem with safety risk.
When: Occurs intermittently; one owner at undisclosed mileage during normal driving
Symptoms owners cite: Engine power loss on highway; Slow RPM reduction when shifting or at stop; Sudden unintended acceleration/surge forward; Check Engine light illuminates; Throttle-by-wire circuits malfunction
Codes mentioned: P2138 - Accelerator pedal position sensors 1 and 2 disagreement
Heated seat wiring fire
Vehicle parked on city street catches fire originating in driver-side front seat heating element. Seat burned completely; soot visible throughout vehicle interior. Subaru investigation concluded fire was not caused by heated seats, but owner and physical evidence indicate faulty heating element wiring as cause. Another report documents burning/scorching of driver seat when heating system activates.
When: Vehicle parked unattended; one case at 134,000 miles
Symptoms owners cite: Seat catches fire/burns completely; Soot throughout vehicle interior; Scorching/smoldering when heating system activates; Severe burn marks on driver seat
Repairs/costs cited: Towing cost and body shop repair required; insurance denied coverage as non-collision damage. Subaru declined responsibility in first case.
Recalls/TSBs owners mention: Subaru inspected and determined fire not caused by heated seats (disputed by owner)
Electrical fire in map light/headliner area
Vehicle shuts off during start sequence and goes completely dead. Subsequently, owner discovers large burn mark in headliner surrounding map light panel; map light and auto-dimming mirror are melted. Indicates electrical fire in dash-mounted components.
When: During start attempt; vehicle parked
Symptoms owners cite: Vehicle dies during starting; Headliner burn mark around map light; Map light melted; Auto-dimming mirror melted
Airbag non-deployment in frontal collision
Driver-side steering wheel airbag failed to deploy during frontal collision accident. Owner experienced whiplash and incurred significant body shop repair bill. When dealership performed airbag replacement months later, technicians allegedly damaged transmission and other systems while moving vehicle.
When: During accident occurrence; airbag replacement in 2017
Symptoms owners cite: Airbag does not deploy on impact; Transmission damaged during subsequent service
Repairs/costs cited: Airbag replacement performed; transmission damage claimed by owner during dealership service
CD player and gear shift electrical malfunctions
CD player activates by itself when radio is on, without triggering bump or external stimulus; occurs while vehicle is stationary. Gear shift does not always lock in place, preventing vehicle start or movement on inclines. Dealer unable to resolve either issue.
When: Intermittent, during normal use and parking
Symptoms owners cite: CD player engages without user input; Gear shift fails to lock in place; Vehicle cannot start or move on slight inclines
Repairs/costs cited: Dealer unable to perform repair
Synthesized from 23 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
I was driving on the highway, and the car seem to loose power, luckily I noticed it, as I was able to cost over to the side of the rode. I own a carmd, and attached it to my car, it gave me code p2138 which means the throttle position sensors (2 of them) not being in agreement. I think this is very dangerous as this can happen at any time while one is driving, potential leading to a accident or…
I had owned the car for not even a year yet back in 2012, and the only accident I've ever been in happened on my way to school(college). The air bag did not come out of the steering wheel, but should have. Luckily I only experienced mild whip lash, and very large body shop bill. Also when they finally brought me in to get it replaced this past summer(2017) they pushed my car around the lot, and…
The wiring harness on the rear lift gate (station wagon) keeps breaking and shorting out. This is a dangerous defect, as rear lights can go out without notice, leading to a possible rear-end collision. Dangerous for pedestrians when the backup lights have shorted out and are not visible. Rear visibility also hampered under snowy or rainy conditions when the wiper shorts out. Repairs have been…
Had electrical trouble with your 2005 Subaru Legacy?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2005 Subaru Legacy?
It's a meaningful issue. 23 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Across the 23 complaints that reported odometer mileage, most electrical failures cluster between 76,000 and 110,000 miles, with the median around 95,000. A quarter of owners report trouble before 76,000; a quarter make it past 110,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Subaru/Legacy.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.