Subaru Forester Common Problems: What to Do
The Subaru Forester has a strong reputation for reliability, but it does have a handful of recurring issues that owners need to know about. Most are tied to the EJ-series and FA-series engines across the SG, SH, SJ, and SK generations. Catching these early saves you from expensive repairs down the track.
What Causes It
- Head gasket failure (EJ25 engine, 2000-2010 models): The 2.5L EJ25 is notorious for external head gasket leaks. Look for oil or coolant weeping around the gasket seam on the block. Internal failure causes white smoke from the exhaust and coolant loss without visible leaks.
- Oil consumption (FA20 and EJ25 engines): Many Foresters burn oil between services. If you're adding more than 500ml per 1,000km, that's outside normal range and needs investigation.
- Transmission shudder (CVT, 2014+ SJ/SK models): The lineartronic CVT can develop a low-speed judder, particularly in cold weather. Often caused by degraded CVT fluid or early torque converter wear.
- Timing chain rattle (FA20/FA24 engines): Cold-start rattling from the timing chain area points to a worn tensioner or stretched chain. Ignoring this leads to catastrophic engine damage.
- AC compressor failure: Common across multiple generations. Signs are warm air despite the system being on and a grinding noise from the front of the engine bay.
- Rear differential noise (AWD system): A whining or clunking from the rear on turns usually means the rear diff coupling or the rear differential fluid needs attention. Mixing tyre sizes makes this worse fast.
What to Do Right Now
- Check your oil level cold, before starting the car. If it's below the minimum mark, top it up and note how quickly it drops over your next few drives.
- Inspect the coolant reservoir. Look for brown sludge, oily residue on the cap, or a persistent drop in level. Any of these is a red flag for head gasket issues.
- Check your tyres are all the same size and tread depth. Mismatched tyres wreck the AWD coupling on Foresters faster than almost anything else.
- Listen on cold starts. A rattle from the engine that disappears after 30 seconds warrants a timing chain inspection before you rack up more kilometres.
- Get the CVT fluid checked if your car has over 60,000km and it's never been done. Subaru recommends replacement around that interval despite the "lifetime fluid" marketing.
When It's Serious
Stop driving immediately if you see white smoke from the exhaust, the temperature gauge climbs above normal, or you notice a sweet smell from the engine bay. These are signs of active head gasket failure or coolant loss. Continuing to drive overheats the engine and can warp the cylinder head, turning a $1,500 repair into a $5,000+ job.
A persistent timing chain rattle that doesn't clear after warm-up is also a stop-now situation. If the chain jumps a tooth or snaps, you're looking at bent valves and possible engine replacement. Have it towed rather than risk it.