From cracked oil pickup tubes and low oil pressure to full spun-bearing engine destruction — the EJ257 STI's most infamous failure, covering both early warning stage and full failure stage.
Reviewed by SubaruReview Editorial Team · Last reviewed 2026-07-13 · Editorial standards
How this problem ranks against the other documented WRX / STI failures — cost, severity, and DIY difficulty at a glance.
| Problem | Years | Severity | Repair cost | DIY |
|---|---|---|---|---|
| EJ257 Rod Bearing Failure & STI Rod Knock (2004-2021) (this page) | 2004-2021 | Critical | $400–$12,000 | 5/5 |
| EJ255/EJ257 Ringland Failure | 2008-2014 | Critical | $4,500–$8,500 | 5/5 |
| 2022+ WRX FA24 RTV Oil Pickup Clog | 2022-2024 | Critical | $2,200–$4,000 | 4/5 |
| Subaru WRX Turbo Banjo Bolt Screen Oil Starvation | 2002-2014 | Critical | $400–$2,500 | 4/5 |
| WRX FA20 Bent Connecting Rod | 2015-2021 | Critical | $6,500–$11,000 | 5/5 |
This is one of several documented WRX / STI problems we track, and it fits inside the broader Engine Guides guide. If you're weighing repair against replacement, cross-check the Subaru repair-cost database and any open NHTSA recalls on your VIN before booking a shop.
**Root cause / early warning stage.** The EJ257 has a weak brazed oil pickup tube that can crack and aerate the oil, plus tight factory bearing clearances that leave little margin under sustained high RPM or heat. Early symptoms — flickering oil-pressure light at idle, copper glitter in the filter, faint rhythmic knock only when warm, rising 'Fine Learning Knock Correction' on an Accessport — appear before catastrophic damage. Caught here, the fix is a stronger pickup tube, a heavier oil, and shorter change intervals; the engine survives.
**What happens if ignored / full failure stage.** Continued driving lets the oil film disappear between rod bearing and journal. Metal-on-metal contact chews through the babbitt layer, the bearing 'spins' (rotates in its housing), clearance opens up, and the rod begins hammering the crankshaft. Within days to weeks the rod either seizes and snaps or exits the side of the block, taking the short-block with it. At this stage the only fix is a full engine rebuild or replacement short-block.
Two-part: (1) EJ257's weak factory oil pickup tube cracks at the brazed joint, aerating oil and starving the mains; (2) tight factory bearing clearances plus 5W-30 OEM spec leave no margin for high-RPM canyon/track use. Both paths converge on the connecting-rod bearings, the weakest link in the oiling system.
Two-part: (1) EJ257's weak factory oil pickup tube cracks at the brazed joint, aerating oil and starving the mains; (2) tight factory bearing clearances plus 5W-30 OEM spec leave no margin for high-RPM canyon/track use. Both paths converge on the connecting-rod bearings, the weakest link in the oiling system.
National average $400–$12,000. Early-stage preventive work — reinforced pickup tube install + heavier oil switch + oil analysis — runs $400-$1,500. If the bearing has already spun, a reman short-block runs $5,500-$8,500 and a full built short-block with ACL/King race bearings and a 12mm oil pump runs $9,000-$12,000. Labor is 15-20 hours either way.
Difficulty 5/5. Reinforced aftermarket oil pickup tube (Killer B Motorsport or equivalent) — preventive stage
Flickering oil pressure warning light at idle (early); Low oil pressure at idle, under 10 psi warm (early); Copper or silver shavings on the oil filter cut-open (early); High 'Fine Learning Knock Correction' values on an Accessport (early); Deep rhythmic knock from lower end at idle, often warm only (mid-stage); Metallic hammering that increases with RPM (late); Loss of power, thrown rod, engine will not restart (terminal)
Owners typically pay $400–$12,000 at an independent Subaru shop, parts and labor included. Our Subaru Oil Pan Gasket Replacement Cost guide breaks the job down by parts, labor hours, and where the money actually goes.
The same generation also sees EJ255/EJ257 Ringland Failure and 2022+ WRX FA24 RTV Oil Pickup Clog. Both are documented with symptoms, cost, and a permanent-fix walkthrough — see the full list in the WRX / STI hub.
Cross-check NHTSA campaign 18V-846, which covers FA20 Valve Spring Fracture on 2012-2014 BRZ/Forester XT/WRX/Legacy. Recall work is free at any Subaru dealer — always run your VIN before paying for the fix.
We rate it 5/5 on our DIY scale. Most owners come out ahead with an independent Subaru shop; read labor-hour benchmarks in the repair-costs hub before you commit tools and a weekend.
It's part of our Engine Guides cluster, which collects every article covering the same system as this failure.
Same EJ-family boxer — the failure mode carries across every chassis this engine shipped in.
Same failure mechanism documented on a different Subaru — shares components with this article.
EJ, FA, FB, and EZ boxer deep-dives — the engine background this failure sits inside.
Dig into the Problems Database to plan your next maintenance sprint, or browse every model hub for buyer's guides, generation breakdowns, and known-issue lists.