EJ20 Turbo
Subaru · 2.0L Turbo Boxer I4
1994–2020
"WRX/STI legend. Unequal-length headers = boxer rumble. Head gasket concerns. Maintenance-intensive but rewarding."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Ringland failure under heavy modification
▸Loss of compression, blue smoke, blow-by
Semi-open deck means ringland cracks when heavily boosted. Stock use: much safer. >300hp: ringland risk.
Stock or mild use in Greece: manageable. Heavy tuning: serious risk.
Rod bearing wear (oil quality critical)
▸Knock under load, oil analysis showing bearing metals
Oil quality and frequent changes critical. Flat-four oil delivery can starve bearings on hard use.
WRX/STI owners in Greece: oil every 5k km MAX. Oil analysis recommended.
Models with EJ20 Turbo 1
Other Subaru Engines
Tuning Potential
400hp+ Stage 2
Frequently Asked Questions
Is the Subaru EJ20 Turbo reliable?
The Subaru EJ20 Turbo scores 62/100 with a verdict of CAUTION. It has 2 documented issues with total repair costs between €3,200 and €9,000.
What are the common problems with the EJ20 Turbo?
The most common issues are:
- Ringland failure under heavy modification — high, repair cost €2,000–€6,000, 60,000 km–120,000 km
- Rod bearing wear (oil quality critical) — high, repair cost €1,200–€3,000, 80,000 km–150,000 km
What cars use the Subaru EJ20 Turbo?
The EJ20 Turbo is found in:
- WRX STI 2.5T (2014–2021)
How much does it cost to repair the EJ20 Turbo?
Total potential repair costs for all 2 known issues range from €3,200 to €9,000. The most expensive issue is typically .
What years was the EJ20 Turbo produced?
The Subaru EJ20 Turbo was produced from 1994 to 2020. It is a 1994cc H4 petrol turbo engine.
Scores are calculated from documented issues, repair costs, and failure patterns across thousands of owner reports and technical sources. Learn about our methodology. Always inspect before you buy.