1999 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
1999 · All trims · All engines
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1999 Subaru Legacy has 5 documented known issues, with 2 rated critical. The most serious are Interference engine: neglected timing belt destroys valves ($500-$4,000 repair) and EJ25 DOHC (Phase I) internal head gasket failure ($1,500-$2,800 repair). Across all issues with published estimates, repair costs range from $250 to $4,000. DIY maintenance guides at au7o.io.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
VEHICLE DESCRIPTION: PASSENGER AND SPORT UTILITY VEHICLES EQUIPPED WITH ANTI-LOCK BRAKING SYSTEM (ABS). (THE 1999 2.2 LITER LEGACY VEHICLES ARE EXCLUDED). IN EXTREMELY COLD WEATHER, THE BRAKE PEDAL GOES TO THE FLOOR AND THE VEHICLE STOPPING DISTANCE IS INCREASED.
ENGINE AND ENGINE COOLING:ENGINE
VEHICLE DESCRIPTION: PASSENGER VEHICLES, ALSO SERVICE PARTS SUPPLIED TO SUBARU DEALERS ARE INVOLVED (LOT NUMBERS F01 J21D2, F01 J30D2, F02 J09D1, F02 J09D2, AND F02 J20D1). THE PUROLATOR OIL FILTER CANS USED ON THESE VEHICLES CAN FRACTURE CAUSING A VAPORIZED OIL SPRAY AND SUBSEQUENT OIL LEAK.
POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL)
VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS. DUE TO POOR WELDS, IGNITION KEYS CAN STICK, SHIFT LEVERS/LINKAGES CAN BREAK AND SHIFT LEVERS CAN MOVE.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1999 Subaru Legacy has 5 documented issues. The most frequently reported are: Interference engine: neglected timing belt destroys valves, EJ25 DOHC (Phase I) internal head gasket failure, 4EAT AWD torque bind (Duty C solenoid / transfer clutch). Of these, 2 are rated critical and should be addressed promptly.
The 1999 Subaru Legacy has 5 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Interference engine: neglected timing belt destroys valves and EJ25 DOHC (Phase I) internal head gasket failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Subaru Legacy issues range from $250 to $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Interference engine: neglected timing belt destroys valves, typically costs $500-$4,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The DOHC EJ25 and the 1997-and-later SOHC EJ boxers are interference designs - if the rubber timing belt breaks or jumps teeth, the pistons strike open valves and bend them, often ruining the heads. (The pre-1997 SOHC EJ22 is non-interference; the change to interference on the SO… Repairs typically run $500-$4,000. Severity: high.
The first 2.5L boxer in the Legacy, the EJ25D DOHC (Phase I), used a composite head gasket that fails internally around the 100,000-mile mark. Unlike the later external-leak variant, this failure lets coolant and combustion gases mix, causing loss of compression, coolant in the o… Repairs typically run $1,500-$2,800. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
AIR BAGS
VEHICLE DESCRIPTION: PASSENGER VEHICLES. INADVERTENT AIR BAG DEPLOYMENT CAN OCCUR AFTER UNDERCARRIAGE CONTACT OF THE TOW HOOKS WITH CURBS, DIPS, SPEEDBUMPS, POTHOLES, ETC.
ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THESE VEHICLES HAVE AN ALTERNATOR PROBLEM THAT CAN RESULT IN A LOSS OF CHARGING CAPABILITY.
+ 4 more recalls. Check all on NHTSA.gov
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Automatic-transmission Legacys use an electronically controlled transfer clutch (governed by the Duty C solenoid) to send torque to the rear wheels. When the clutch pack sticks engaged or the Duty C solenoid gets dirty/sticky, the AWD stays locked on dry pavement and cannot relie… Repairs typically run $300-$2,500. Severity: medium.
The Legacy's front hubs use tapered roller bearings that require correct axle-nut preload. On these cars they are a common wear item: an improperly torqued axle nut, high mileage, or water intrusion leads to a growing hum/roar that rises with road speed and changes when loading t… Repairs typically run $250-$550. Severity: medium.
Later single-layer graphite-coated head gaskets on the SOHC 2.5L and 2.2L boxers develop small EXTERNAL coolant seeps, typically at the left cylinder head, as the coating chips near 100,000 miles. Owners often smell coolant or top off the reservoir before seeing a puddle. Subaru… Repairs typically run $1,200-$2,200. Severity: medium.
