In short, the 2007 Forester's most frequently reported problems stem from the 2.5L engine's sealing and cooling issues, timing-belt needs, and aging transmission and AWD components, along with various electrical or suspension wear as the vehicle ages.
As these Subarus age, owner and mechanic experiences converge on a few recurring trouble spots. The specifics can vary by whether the car uses the naturally aspirated 2.5L engine or the turbocharged 2.5XT, as well as by mileage, maintenance history, and regional conditions. The sections below outline the most commonly cited issues, typical symptoms, and what owners can expect in terms of maintenance and costs.
Engine and cooling concerns
Common engine- and cooling-system problems reported by Forester owners aged 10+ years include the following:
- Head gasket failure on many 2.5L EJ25 engines, especially with a history of overheating or high mileage (symptoms: coolant loss, white exhaust, milky oil).
- Oil leaks from valve-cover gaskets, cam seals, oil pan, and timing cover as gaskets age, leading to visible leaks and potential low oil levels.
- In some engines, higher-than-usual oil consumption as components wear, requiring more frequent top-ups or gasket/seal service.
- Timing belt wear and the risk of belt failure around 100k–110k miles; a broken belt can cause severe engine damage in an interference engine, so belt-kit replacement with pump is recommended.
- Cooling-system wear, including radiator and water-pump failure, hose cracks, or thermostat issues that can cause overheating if not addressed promptly.
Maintenance note: Engine problems often share symptoms with regular wear, so proactive inspections during service visits help catch small leaks and overheating early.
Transmission and drivetrain issues
Drivetrain and transmission problems are commonly reported as the Forester ages, particularly with older automatics and the AWD system:
- Automatic transmission wear, including hard shifting, slipping, delayed engagement, or torque-converter shudder; some units require rebuilding or replacement at higher mileages.
- All-wheel-drive components, including the center differential and driveshaft, showing wear or leaks; service with the correct fluids is important to maintain AWD reliability.
- Axle CV joints and constant-velocity joints wearing out, causing clicking noises on turns or overall driveline vibration.
- Wheel bearings and hubs wearing out, producing rumbling or growling noises at speed.
Conclusion: Drivetrain health heavily influences long-term ownership cost; addressing symptoms early can prevent more expensive repairs.
Electrical and interior issues
Electronic and interior reliability concerns include:
- ABS/traction-control warning lights due to wheel-speed sensors, ABS module, or wiring issues, common as harnesses age.
- Battery and charging system failures, including dead batteries or failing alternators, especially in older vehicles with numerous electronics.
- Power equipment failures, such as faulty window regulators, mirror controls, or sunroof leaks (if equipped) that let water into the cabin.
- Climate control and blower motor issues, leading to reduced heating/cooling performance in extreme temperatures.
Tip: A thorough electrical system check during a pre-purchase inspection can reveal hidden faults that would be costly to repair later.
Maintenance costs and data
Understanding typical repair costs helps set expectations for a 2007 Forester:
- Timing belt kit (belt, water pump, seals): roughly $600–$1,200 including parts and labor, depending on shop and region.
- Head gasket replacement (on affected 2.5L engines): commonly $2,000–$4,000 if no major damage; more if machine work or cooling-system repairs are needed.
- Automatic transmission service or rebuild: typically $1,500–$3,500 depending on extent of wear and the need for a used or rebuilt unit.
- Oil-leak repairs (valve cover gaskets, cam seals, oil pan): $150–$600 per leak repair entry point.
- Brake, suspension, and wheel bearing work: a few hundred to around $1,000 per component depending on parts and labor.
Pro tip: Regular maintenance reduces the risk of expensive failures; schedules recommended by Subaru and reputable mechanics should be followed, especially for timing belt replacement around 100k miles.
Buying tips and reliability considerations
If you're evaluating a 2007 Forester, consider the following checks and questions:
- Verify service history, especially timing belt/water pump replacement around the 100k-mile mark and any cooling-system work.
- Check for signs of head gasket issues: coolant in oil, milky oil on dipstick, white exhaust, or overheating episodes.
- Perform a compression and leak-down test to assess engine health, particularly on high-mileage vehicles.
- Inspect the automatic transmission for smooth shifting and no slipping; check for hard shifts or shudder when warm.
- Test all AWD components if the vehicle is equipped; listen for unusual noises in the drivetrain and verify proper operation of the center differential.
Additional notes: Have a trusted mechanic assess the vehicle before purchase and request a complete maintenance log to evaluate ongoing care and potential future repairs.
Summary
Across its model year, the 2007 Subaru Forester's most common problems revolve around engine sealing and cooling (notably head gaskets and oil leaks), timing-belt maintenance, aging drivetrain and transmission components, and general electrical or comfort-system reliability. With careful maintenance, attentive inspection, and timely repairs, many owners report dependable performance beyond the 100k–200k mile range. Prospective buyers should prioritize a thorough pre-purchase inspection and a documented service history to gauge current condition and future risk.