This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
full bulletin at NHTSA ↗2018 Subaru WRX engine problems
moderate 8 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
8
Recalls
0
Avg fix
$3,100
When does it fail?
Of the 8 engine complaints filed for the 2018 Subaru WRX, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Among the 6 model years of Subaru WRX in our records for engine problems, this one ranks #3 by owner-complaint volume.
Engine accounts for 20% of all owner complaints filed against this vehicle, across 5 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER CM TO ECM) and B1572(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT) are detected by Keyless Access with Push Button Start(KACM).
full bulletin at NHTSA ↗In the interest of customer satisfaction, Subaru of America, Inc. (Subaru) is initiating a new voluntary emissions recall for certain 2018 model year WRX and Forester vehicles and certain 2019 MY WRX equipped with a 2.0L turbo engine.
full bulletin at NHTSA ↗This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
full bulletin at NHTSA ↗This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 3 most recent
Vehicle mileage was 7387 miles. While driving several check engine lights illuminated including traction control, check engine light, ABS, hill decent assist, cruise control icon flashing. Vehicle power was dramatically reduced. Made appointment next day with Subaru dealership. I was informed code p0016 showed up on the diagnosis. It indicated crankshaft position camshaft position correlation…
Oil changes always done, no modifications to vehicle. Driving down road lights all come one and car starts smoking. Rod broke and put hole in engine.
I bought a 2018 Subaru WRX with 61,000 miles, After driving it 6,000 miles with engine spun a rod bearing, requiring a complete engine replacement. This is a vehicle that in the previous 4th generation of the car, it was recalled for this exact issue. the total repair bill for this fix is $11,720.43. This is on a car with 67,000 miles. 7,000 miles over Subaru's manufacture warranty. After…
Had engine trouble with your 2018 Subaru WRX?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Subaru WRX?
It's a documented issue but not catastrophic. 8 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 8 complaints filed, engine issues most often appear around 24,399 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Subaru/WRX.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.