EraVerdict: Rally DNA in a compact sedan/wagon. Compression and leak-down before you buy — especially on STI EJ257 and late WRX EJ255 cars — beat any cosmetic inspection.
At a glance
Risk 4/5 Market: Ringland lottery on STI
Must-have records:
- Compression / leak-down results
- Timing belt service
- Turbo / head-gasket invoices
- Oil-change interval proof
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Buy-risk rundown
| Issue | Symptom | How to check | Typical cost (as of Nov 2026) |
|---|---|---|---|
| Ringland failure (esp. EJ257 STI, 2006–07 EJ255 WRX) | Knock, misfire, smoke, oil use, low compression on one hole | Compression and leak-down on all four | Short-block rebuild commonly ~$5,000–$10,000 all-in [1][2] |
| Head gaskets / coolant-oil mixing | Milky oil, coolant loss | Inspect oil and coolant; sniff test | Not yet verified as a standalone quote [3] |
| Turbo shaft play / wastegate | Whine, boost creep or lag | Shaft play check; boost gauge drive | Not yet verified [3] |
| Rust (arches, sills, strut tops) | Bubbling paint, soft metal | Probe arches and underside | Salt-belt cars are walk-aways when structural [4] |
| WRX 5-speed synchros / STI 6-speed | Cold 2nd crunch; grind | Cold shift test | STI 6MT is generally stronger; rebuild cost not yet verified [4] |
Cost figures checked against the sources below in Nov 2026. Bracketed numbers refer to the source list.
Notes
- Bugeye (02–03), blobeye (04–05), hawkeye (06–07) share the GD checklist with different faces.
- Stock tune and short oil intervals matter more than mileage on these engines.
Before you buy
Use our printable pre-purchase inspection checklist and get a PPI from a marque specialist.
Sources
- JDMuscle, EJ ringland failure explained (accessed Nov 2026)
- Crawford Performance, STI engine build cost (accessed Nov 2026)
- Squeezed, 2002–07 GD WRX/STI buyer's guide (accessed Nov 2026)
- Road & Track, 2004–07 STI buyer's guide (accessed Nov 2026)
Last updated 2026-11-05. Costs vary by region and shop.
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