EJ25 NA
Subaru · 2.5L NA Boxer I4
1996–2020
"Outback/Forester/Legacy. Head gasket failure is endemic — external oil leak type. Budget for gasket job at 150k km."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Head gasket failure — systematic design flaw
▸Coolant loss, overheating, milky oil, bubbles in coolant overflow
THE EJ25 problem. Graphite composite head gaskets fail systemically. 75k-150k km range. ALL pre-2011 EJ25 SOHC affected eventually.
Any EJ25 NA purchase in Greece: check coolant for contamination immediately. If not yet failed: budget €1,500-4,000 proactively. Or avoid entirely.
Cooling system stress from failed head gaskets
▸Overheating, warped head in severe cases
Failed head gasket leads to overheating which warps the aluminum head. Repair then becomes €4,000+.
Do not drive an overheating EJ25. Shut off immediately to prevent head warping.
Other Subaru Engines
Tuning Potential
N/A
Frequently Asked Questions
Is the Subaru EJ25 NA reliable?
The Subaru EJ25 NA scores 55/100 with a verdict of CAUTION. It has 2 documented issues with total repair costs between €2,000 and €6,000.
What are the common problems with the EJ25 NA?
The most common issues are:
- Head gasket failure — systematic design flaw — critical, repair cost €1,500–€4,000, 75,000 km–150,000 km
- Cooling system stress from failed head gaskets — critical, repair cost €500–€2,000, 80,000 km–160,000 km
How much does it cost to repair the EJ25 NA?
Total potential repair costs for all 2 known issues range from €2,000 to €6,000. The most expensive issue is typically .
What years was the EJ25 NA produced?
The Subaru EJ25 NA was produced from 1996 to 2020. It is a 2457cc H4 petrol na engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.