"Service bulletin - American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned, Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.). The piston rings on certain cylinders may rotate and align, which can lead to spark plug fouling. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on."
full bulletin at NHTSA ↗2011 Honda Pilot engine problems
moderate Owners of the 2011 Honda Pilot have filed 18 NHTSA complaints about the engine, typically surfacing around 41,000 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
18
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2007 Pilot | 16 |
| 2008 Pilot | 13 |
| 2009 Pilot | 29 |
| 2010 Pilot | 17 |
| 2011 Pilot (this page) | 18 |
| 2012 Pilot | 24 |
| 2013 Pilot | 42 |
| 2014 Pilot | 25 |
| 2015 Pilot | 14 |
When does it fail?
Of the 18 engine complaints filed for the 2011 Honda Pilot, 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
No new NHTSA engine complaint has been filed on this vehicle in over 8 years — the issue may be aging out of the active population.
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.
These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB standards, but parts on vehicles are not effected.
full bulletin at NHTSA ↗These SKUs are Exhaust Manifolds with Catalytic Converters. The customer communication requested return of unsold inventory due to a loss of CARB certification. These SKUs can no longer be sold as they do not meet CARB standards, but parts on vehicles are not effected.
full bulletin at NHTSA ↗Service Bulletin - The front rocker arm oil control valve is leaking.
full bulletin at NHTSA ↗"Service bulletin - American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned, Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.). The piston rings on certain cylinders may rotate and align, which can lead to spark plug fouling. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on. American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs P0301 through P0304) to 8 years with unlimited mileage from t
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2011 Honda Pilots describe several distinct engine problems. The most common complaint involves excessive oil consumption where oil seeps past piston rings and fouls spark plugs, triggering misfire codes and check engine lights. This happens as early as 3,000 miles and sometimes forces expensive repairs—piston rings, spark plugs, and occasionally full short-block replacement at $3,500 or more. Honda issued technical service bulletins but no recall, leaving owners fighting over warranty coverage based on VIN and parts sourcing.
The VCM (Variable Cylinder Management) system in ECO mode causes severe vibration and shuddering, especially during acceleration from stops and low-speed hill climbing. In 2011 models, the same two cylinders shut off every time rather than rotating, causing uneven cylinder wear. Dealerships tell owners this is normal—it isn't, and owners report hundreds of similar complaints with no fix offered.
Additional failures include sudden engine stalls (sometimes at highway speeds, once with loud popping), unintended acceleration to 5000 RPM while braking, timing belt shredding at 26,000 miles, valve cover erosion with fire risk, and exhaust odor entering the cabin. One timing belt failure occurred with no root cause identified. Service bulletins address some issues, but recalls remain absent across the board.
Same Honda Pilot engine reports on nearby years: 2009 · 2010 · 2012 · 2013 · 2014
Failure modes owners describe
Excessive oil consumption and spark plug fouling
Piston rings allow oil to seep past and foul spark plugs, causing cylinder misfire codes. Affects V6 engines from 2009-2013 model years. Owners report having to replace spark plugs, piston rings, and sometimes the short block. One owner had to replace piston rings and spark plugs at $3500+. Honda has issued TSBs covering the issue but stopped short of a recall.
When: Varies from as early as 3,000 miles to 69,000+ miles; one complaint at 153,235 miles referenced oil consumption starting earlier
Symptoms owners cite: Check engine light (steady or flashing); Cylinder misfire; Spark plugs fouled with engine oil; Excessive oil consumption requiring frequent oil changes; VSA and VTM-4 warning lights coming on
Codes mentioned: P0302, P3400, P3497
Repairs/costs cited: Replaced all spark plugs and updated VSA software via TSB; some owners replaced piston rings and short block at owner expense ($3500+); dealership advised monitoring oil level monthly and changing oil every 5,000 miles max
Recalls/TSBs owners mention: Honda TSB 11-033 and TSB 13-082 address excessive oil consumption and misfire; no recall issued; 8-year extended warranty mentioned by one owner; some customers received piston/ring replacement coverage, others denied based on VIN or parts manufacturer
VCM (Variable Cylinder Management) vibration and shudder in ECO mode
Two cylinders shut off simultaneously in ECO mode on 2011 models instead of randomly rotating as in later years, causing uneven wear on remaining cylinders and severe vibration/shuddering. Occurs during acceleration from stops and when ECO mode engages at highway cruising speeds. Owners report this as a design flaw with no factory fix offered.
When: Begins after break-in period and warm-up; worsens over time; occurs during ECO mode engagement and low-RPM cruising
Symptoms owners cite: Severe vibration/shudder felt through steering wheel, gas pedal, and floorboard; Shudder when accelerating from dead stop to 40 mph; Check engine light (in some cases); Vibration worst at low RPM and when climbing hills in ECO mode
Repairs/costs cited: No repair found; Honda dealerships state this is normal operation and nothing can be done
Recalls/TSBs owners mention: Honda indicates vibration is normal operation; no technical service bulletin or recall addressing design; owners report seeing hundreds of similar complaints on Honda message boards with same response
Sudden engine stall at highway/city speeds
Engine stalls without warning during normal driving, requiring towing. One incident involved loud popping noise before stall at 87 mph. Another stall occurred at stoplight with inability to restart. One stall occurred at 20 mph after malfunction indicator appeared. Timing belt failure confirmed in one case at very low mileage.
When: At 9,800 miles, 20 mph city driving, 87 mph highway driving, and in traffic; timing belt shredding occurred at 26,000 miles
Symptoms owners cite: Sudden engine stall while driving; Loud popping noise preceding stall (one case); Malfunction indicator lamp illumination before stall; Engine unable to restart; No power output
Repairs/costs cited: Timing belt replaced; one throttle body and throttle gasket replaced; other stalls not definitively diagnosed; one dealer suspected electrical system but could not confirm
Recalls/TSBs owners mention: Manufacturer offered no assistance in one case; no recalls identified for stalling issue
Unintended rapid acceleration
Vehicle suddenly accelerated to 5000 RPM while owner was applying brake pedal, nearly causing collision. Occurred while slowing to merge onto highway. Vehicle dropped back to normal idle on its own.
When: At 29,800 miles during merging maneuver
Symptoms owners cite: Unintended rapid acceleration to 5000 RPM; Engine revving despite brake pedal pressed to floor; Vehicle drops to normal idle without driver intervention
Valve cover erosion and potential oil leak to exhaust
Front cylinder head valve cover developed an erosion hole adjacent to the middle spark plug (#5) tube cutout, directly above the exhaust manifold oxygen sensor. Valve cover material degraded to powder. Owner notes risk of oil leaking onto hot manifold and igniting.
When: After 153,235 miles; no symptoms or warning signs before discovery
Symptoms owners cite: Visible erosion hole in valve cover material; Valve cover material degraded to powder; No check engine light or misfire codes present
Repairs/costs cited: Owner performed own maintenance; valve cover available for inspection but not repaired
Rotten egg smell and exhaust entering cabin
Strong rotten egg smell enters cabin when air conditioning is set to recirculate and hard acceleration occurs (e.g., climbing steep hill). Owner suspects exhaust is leaking into cabin at all times but only smells it under these conditions. Occurs after break-in period.
When: After break-in period; ongoing throughout vehicle ownership
Symptoms owners cite: Rotten egg smell in cabin during hard acceleration with AC on recirculate; Smell worse with AC on recirculate, less severe with AC on fresh air; No other vehicles ahead when smell occurs
Repairs/costs cited: Three dealership visits with no resolution; dealer states nothing is wrong
Synthesized from 18 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
My 2011 Honda pilot has had a severe shutter when accelerating from a dead stop to up to 40mph. It has gotten progressively worse since I bought it in in 2014. It's now gotten to the point where just normal road driving when the eco mode kicks in it will also shutter to the point where I have to accelerate to get it to stop. I also find there's excessive oil consumption, even having to replace a…
Tl* the contact owns a 2011 Honda pilot. The contact stated that while driving approximately 87 MPH, the vehicle suddenly stalled after exhibiting a loud popping noise. The vehicle was towed to the dealer where they advised the contact that the failure could have been caused by the electrical system but they could not confirm that it was the actual cause. The vehicle was not repaired. The…
Had engine trouble with your 2011 Honda Pilot?
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 2011 Honda Pilot?
It's a documented issue but not catastrophic. 18 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 12 complaints that reported odometer mileage, most engine failures cluster between 29,352 and 168,000 miles, with the median around 41,000. A quarter of owners report trouble before 29,352; a quarter make it past 168,000. 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/2011/Honda/Pilot.
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.