This Bulletin provides the diagnostic procedure for the STARLINK® Remote Engine Start (RES).
full bulletin at NHTSA ↗2010 Subaru Outback engine problems
moderate Owners of the 2010 Subaru Outback have filed 44 NHTSA complaints about the engine, typically surfacing around 22,262 miles at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Failure mileage
Complaints
44
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2006 Outback | 23 |
| 2007 Outback | 12 |
| 2008 Outback | 13 |
| 2009 Outback | 12 |
| 2010 Outback (this page) | 44 |
| 2011 Outback | 47 |
| 2012 Outback | 24 |
| 2013 Outback | 47 |
| 2014 Outback | 28 |
When does it fail?
Of the 44 engine complaints filed for the 2010 Subaru Outback, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 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
Owners have filed 44 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 18 model years of Subaru Outback in our records for engine problems, this one ranks #3 by owner-complaint volume.
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 Service Information Bulletin provides the Service Manual Correction to the diagnostic procedure for DTC B2A16 (Immobilizer Key Collation Diagnosis).
full bulletin at NHTSA ↗This Bulletin announces the diagnostic procedures to be followed when diagnosing engine oil leakage on FA and FB type engines.
full bulletin at NHTSA ↗The purpose of this bulletin is to advise of SOA’s revised Catalytic Converter Recycling Program shipping procedure.
full bulletin at NHTSA ↗This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2010 Outback stalls unexpectedly, most commonly when the driver depresses the clutch to downshift (manual) or applies brakes to stop (automatic/CVT). RPMs crater—sometimes to 400–500—then the engine either shuts down or recovers with a violent shudder. During a stall, power steering and power brakes vanish, creating collision risk at intersections and on highways. The problem worsens in hot weather and with A/C on, happens within the first few months of ownership in most cases, and restarts immediately after it occurs.
Dealers have run diagnostics and found nothing—or improve the issue temporarily by reprogramming the engine control module. One dealer acknowledged having multiple 2010 Outbacks in with the same stall complaint but said no factory fix was available. Owners report a loaner 2010 Outback exhibited identical stalling, suggesting a widespread design flaw rather than an isolated unit defect.
Separately, owners report head gaskets failing at 67k–112k miles, far below typical engine life. Overheating warning lights come on during normal driving; coolant boils out and mixes with oil. The 2010 removed the dashboard temperature gauge, so owners can't monitor engine heat until the warning light comes on—often too late. Repair costs run high: head gasket, radiator, water pump, and sometimes short-block replacement.
Same Subaru Outback engine reports on nearby years: 2008 · 2009 · 2011 · 2012 · 2013
Failure modes owners describe
Stalling on clutch depression / downshift (manual transmission)
Engine stalls or nearly stalls when clutch is depressed during downshift or approach to stop, especially in manual-transmission models. RPMs drop below safe idle, sometimes without shudder warning. Loss of power steering and brakes during stall event creates serious collision risk.
When: Primarily early ownership (reports within first 5 months to 2 years); worst in hot weather and with A/C running
Symptoms owners cite: Engine stalls or near-stalls when clutch depressed for downshift; RPM drop before stall, often to 400–500 RPM range; Engine shudder as warning (sometimes absent); Loss of power steering and power brakes during stall; A/C shuts off, fan continues running, dashboard warning lights illuminate (battery/alternator); Headlights dim; Problem worsens in hot weather and when A/C is on; Engine restarts immediately after stall
Codes mentioned: ECU/ECM programming issue
Repairs/costs cited: Dealers have performed diagnostic scans with no fault codes found (or intermittent code reading). Some dealers erased vehicle memory; one owner reported ECM was reprogrammed and problem improved but not fully resolved.
Recalls/TSBs owners mention: Subaru engineer confirmed problem at one dealership and stated fix would be available 'for a long time.' Dealers acknowledge multiple affected 2010 models but no fix available at time of complaints. One owner mentions manual-transmission models have ECU fix, but CVT/automatic owners told no fix exists.
Stalling at stop or during braking (automatic and CVT transmission)
Engine stalls or nearly stalls when vehicle comes to a complete stop or during hard braking, regardless of A/C status in most cases. Some owners describe feeling like the car is going to stall every time they approach a stop. Manifests as stumbling, shuddering idle, or sudden shutdown with loss of power assists.
When: Occurs throughout ownership; some started at 5,000 miles, others after years of normal operation
Symptoms owners cite: Engine stalls or nearly stalls when braking to a complete stop; RPM drop to near-stall range; Shuddering or stumbling at idle; Loss of power steering and brakes during stall; May happen every single stop (some owners); Intermittent, unpredictable occurrence (others); Rough idle before stall; Occurs with A/C on or off (inconsistent across reports)
Codes mentioned: No fault codes found on dealer scans
Repairs/costs cited: Dealers unable to replicate in most cases. One CVT owner mentions Subaru issued extended warranty but difficulty getting dealers to diagnose properly. One automatic owner had spark plugs replaced at 68,000 miles. Loaner vehicles with same mileage showed same problem.
Recalls/TSBs owners mention: CVT owners report Subaru issued extended warranty for this known problem but dealers struggle to diagnose it. Manual-transmission models reportedly have ECU fix; CVT/automatic owners told no fix available.
Head gasket failure and overheating
Head gaskets fail prematurely, causing coolant leaks, engine overheating, and mixing of oil and coolant. Overheating can occur during normal highway driving, especially in hot weather or on inclines. Failures reported at mileages well below typical engine life expectancy (67,000–112,000 miles).
When: Various mileages: 67,597 miles; 72,000 miles; 85,000 miles; 93,770 miles; 112,000 miles
Symptoms owners cite: Coolant temperature warning light illuminates; Engine overheats during normal driving; Coolant level drops (boils out); Fuel leaking from rear of vehicle (one report); Check engine light illuminates; Loss of engine temperature gauge visibility (2010–2014 models lack temp gauge); All instrument and warning lights illuminate; Engine shutdown while driving
Codes mentioned: No specific codes mentioned in narratives
Repairs/costs cited: Repairs included head gasket replacement, radiator replacement (one case cracked radiator), water pump replacement, short block replacement. High labor cost and extensive parts replacement required. One owner had ongoing dispute with dealership for repair authorization.
Recalls/TSBs owners mention: Subaru has not issued a recall for head gasket failures. One complaint references chronic HG failure issue unresolved by manufacturer. One owner mentions Subaru knows head gasket material is incompatible with required coolant but has not issued fix.
Dashboard light flickering and electrical anomalies
Dash lights flicker intermittently, sometimes synchronized with stalling events. Battery/alternator warning light illuminates. Headlights dim during stall events. One owner's family member noted flickering was not normal behavior.
When: Early ownership; one report documented flickering over winter months
Symptoms owners cite: Dash lights flicker on and off; Battery/alternator warning light illuminates; Headlights dim during stall event; HVAC fan speed audibly slows during RPM drop
Repairs/costs cited: One dealer ran three different diagnostic tests; all came back normal. One owner suspected alternator based on family advice but dealer diagnostics found no alternator issue.
Synthesized from 44 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Over heating maybe head gasket problem
Had engine trouble with your 2010 Subaru Outback?
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 2010 Subaru Outback?
It's a documented issue but not catastrophic. 44 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?
Across the 38 complaints that reported odometer mileage, most engine failures cluster between 5,000 and 112,000 miles, with the median around 22,262. A quarter of owners report trouble before 5,000; a quarter make it past 112,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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/2010/Subaru/Outback.
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.