1993-2023 Subaru Impreza Problems: 11 Known Issues

The 2.5L SOHC naturally-aspirated engine (EJ251, later EJ253) in 2000-2011 Imprezas is notorious for external head gasket failure. The composite head gaskets degrade over time, allowing coolant and oil to seep externally at the gasket mating surfaces. Unlike a typical blown head gasket that causes coolant-oil mixing, Subaru EJ25 head gaskets typically leak externally first. The boxer engine design means gaskets are at the bottom of the heads, making leaks drip downward and often go unnoticed. If left unaddressed, external leaks can progress to internal coolant-oil mixing and overheating.

The first-generation 2.5L DOHC boxer (EJ25D) used in the 1998-1999 Impreza 2.5 RS (and shared with the 1996-1999 Legacy/Outback/Forester of the era) is notorious for internal head gasket failure. In 1996 Subaru used a composite gasket, then from 1997 switched to a multi-layer-steel shim gasket with a graphite outer film; the film between the combustion chamber and the cooling jacket degrades (typically around 100,000 miles), allowing coolant into the combustion chamber and combustion gases into the cooling jacket. Because the flat-four has two heads and the failure is typically internal (coolant-to-combustion) rather than the external weep seen on the later 2.5 SOHC, the classic pattern is overheating on the highway that cools off in town, and it can warp a head if driven on. This is the defining reliability problem of the DOHC-era 1990s Impreza.

The 2.5L DOHC EJ25D and the 1997-and-later SOHC EJ engines are interference designs: if the rubber timing belt breaks or a belt idler/tensioner pulley seizes, the pistons strike open valves and bend them, destroying the top end. From 1997 all USDM Subaru EJ engines (including the 2.2L SOHC) became interference after a piston/head redesign. Subaru specifies belt replacement at roughly 105,000 miles/105 months, but the belt gives no warning before it snaps, and on 25-30 year-old cars idler pulleys and tensioners are as likely to fail as the belt. Many high-mileage 1990s Imprezas are running on overdue belts, making this a leading cause of catastrophic engine loss on otherwise-sound cars. (Note: the earlier EJ18 and pre-1997 EJ22 SOHC are non-interference, so belt failure there is far less destructive.)

2008-2016 Imprezas (and related Crosstreks) have a known issue with rear coil springs fracturing, particularly in cold climates and areas that use road salt. The broken spring can puncture a tire, damage brake lines, or cause a sudden change in ride height and handling. There is no U.S. recall or service program for Impreza rear springs; Subaru's rear coil spring corrosion program (WUT-05) covers only 2014-2016 Forester models, so Impreza owners generally pay for the repair.

The rear trailing arm bushings on Imprezas corrode and fail, particularly in salt-belt states. The steel sleeve inside the rubber bushing rusts and expands, tearing the rubber apart. This causes clunking noises, vague rear-end handling, and uneven rear tire wear. In severe cases, the bushing can separate completely, allowing the rear wheel to shift its alignment dramatically.

Pressed-in front wheel bearings on these early Imprezas are a recurring wear item; the bearings were sized for the small factory 15-16 inch wheels, and larger aftermarket wheels, high mileage, or hard cornering accelerate failure. A failed bearing hums or roars proportional to road speed, often changing pitch under cornering load as weight shifts across the bearing. Because the bearing is pressed into the knuckle, DIY replacement effectively requires a hydraulic press, so most owners pay a shop or replace the whole knuckle/hub assembly.

The 2023 Subaru Impreza is one of the models named in Subaru of America's WRN-23 safety recall. The defect is in the driveshaft's center support mounting: the support bolts may loosen, and if they do, the front end of the driveshaft can come disconnected from the car. NHTSA records the safety consequence as an increased risk of a crash. This is a manufacturing/assembly-related defect rather than an age-and-mileage problem, and Subaru's remedy addresses both the bolts themselves and the surfaces they clamp against. The recall covers 4,311 vehicles campaign-wide across all the Subaru models it includes — that total is not broken out by model, so it says nothing about how many Imprezas are involved.

Automatic-transmission 1990s Imprezas use the 4EAT with an electronically managed transfer clutch (governed by the Duty C solenoid) to split torque to the rear wheels. When the Duty C solenoid or its control valve sticks/leaks, or the transfer clutch pack wears, the AWD stays partially locked and the car binds during low-speed tight turns, producing a grabbing, grumbling shudder and drivetrain resistance. It is often misdiagnosed as a suspension or tire problem. A quick test: installing the FWD fuse that isolates the transfer clutch will make the bind disappear if the solenoid/valve is the cause.

1993-1999 Imprezas (GC8/GF8/GM sedan, coupe, and wagon) are highly prone to corrosion at the rear wheel arches, rocker panels, and the rear subframe/crossmember, particularly in salted-road climates. The outer quarter panel and wheel housing are joined with spot welds and foam adhesive that are not water-tight, and the overlapping inner-arch seams trap dirt and moisture in a hard-to-access pocket, so rust blooms from the inside out; by the time paint bubbles the damage underneath is usually extensive. The rear subframe and its mounting bolts also corrode; seized or sheared bolts complicate suspension work and can be an inspection (MOT/state safety) failure. This is age- and environment-driven wear that now affects the majority of surviving northern-climate cars.

The 2017+ Impreza (5th generation) windshield draws repeated owner reports of stress cracking, including around the EyeSight camera housing area. Cracks often appear spontaneously without any impact, starting from the edges or around the camera mounting bracket. Temperature changes exacerbate the issue. EyeSight-equipped vehicles require dealer recalibration ($200-400) after windshield replacement, adding significant cost.

The 2012+ Impreza's Lineartronic CVT (TR580 for 2.0L models) is prone to harsh engagement, delayed acceleration response, and premature failure. The smaller TR580 CVT handles the 2.0L engine but can develop valve body issues causing harsh shifts into Drive/Reverse and a pronounced thunk when engaging gear from Park. The CVT chain can stretch, and the transmission oil pump can fail. Subaru extended the CVT warranty to 10 years/100,000 miles on affected models.