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full bulletin at NHTSA ↗2007 Toyota Yaris engine problems
severe 11 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
11
Recalls
0
Avg fix
$3,100
1fire
When does it fail?
Of the 11 engine complaints filed for the 2007 Toyota Yaris, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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
Of the 5 model years of Toyota Yaris we track for engine problems, this one carries the most owner complaints on file — 11.
No new NHTSA engine complaint has been filed on this vehicle in over 10 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.
TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections have been updated. October 30, 2017 Rev1: ? Applicability has been updated to include 2018 model year vehicles. Any previous printed versions of this bulletin should be discarded. SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding. Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated
full bulletin at NHTSA ↗TSB: Supersession Notice. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU?s information.
full bulletin at NHTSA ↗TT: THE VEHICLE MAY BE DIFFICULT TO START OR HAVE AN ABNORMALLY LOW OR ROUGH IDLE AFTER THE BATTERY HAS BEEN DISCONNECTED OR POWER TO THE ENGINE ECM HAS BEEN INTERRUPTED.
full bulletin at NHTSA ↗TT: The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2007 Yaris shows a cluster of distinct engine-related failures. Water intrusion through the fuel filler pipe cap is the most documented issue—it contaminates the charcoal canister and fails the EVAP pump, triggering check engine codes (P043E, P043F, P2401, P2402, P2419). Toyota issued TSB EG048-07 for this defect, but even vehicles with an updated cover can fail. Repairs run $650+ and owners report frustration that a $6 part failure cascades to expensive canister replacement. The emissions system operates poorly when leaking and owners note the check engine light alone doesn't reveal partial system disablement.
Exhaust manifold gasket failure is another repeater—heat and vibration degrade the seal, causing audible exhaust noise and in-cabin smell. Repair (~$40 in parts plus labor) fixes it temporarily; owners expect recurrence since Toyota didn't improve the design.
Multiple owners report unintended acceleration events where the engine revs randomly without pedal input, sometimes in neutral. One instance involved timing gear failure at very low mileage. Separately, some owners experience intermittent throttle unresponsiveness where pressing the accelerator has little to no effect initially.
An alternator fire hazard is documented, along with a serpentine belt that slips and recurs after dealer tightening. A/C drain line clogs frequently, pooling water on the passenger floor and requiring repeated clearing. These are separate issues from the engine itself but part of the overall reliability picture."
Same Toyota Yaris engine reports on nearby years: 2008
Failure modes owners describe
EVAP System Water Intrusion and Canister Failure
Water enters the fuel filler pipe cover due to poor design, contaminates the charcoal canister filter, and damages the EVAP pump. Even vehicles built with an updated filler cover can fail. Plastic threaded inserts on the canister pump valve strip during troubleshooting, rendering the canister unusable.
When: Failures reported; narratives do not specify mileage or age when water intrusion occurs
Symptoms owners cite: Check engine light illuminated constantly during highway travel; EVAP system malfunction; No effect on MPG or basic engine operation
Codes mentioned: P043E, P043F, P2401, P2402, P2419
Repairs/costs cited: Updated filler cover (~$6), canister filter (~$50), charcoal canister (~$600), plus 0.5 hr labor. Owner concern: $6 part failure cascades to $650 in damage. Plastic canister inserts prone to stripping during service.
Recalls/TSBs owners mention: TSB EG048-07 documents the water intrusion issue. Emissions system failure should be covered under longer-term emissions warranty (not 3-year/36,000-mile standard warranty). Updated filler cover part number exists but does not prevent all failures.
Exhaust Manifold Gasket Deterioration and Leak
Exhaust gasket fails due to poor joint and gasket design combined with engine vibration and heat. The gasket material breaks down, creating an exhaust leak at the manifold connection.
When: Recurrent failure expected; owner replaced gasket but notes parts are unchanged from original
Symptoms owners cite: Audible exhaust noise, especially during acceleration; In-cabin exhaust smell (constant and notable); Leaking exhaust gases entering cabin
Repairs/costs cited: New exhaust gasket (~$30), new bolts (~$5), new tension springs (~$5), plus 0.5 hr labor. Owner repaired but expects failure to recur since parts are not improved. Risk that exhaust gases contaminate cabin air.
Unintended Acceleration (Drive-by-Wire Malfunction)
Engine accelerates and decelerates on its own without driver input. Occurs randomly under various conditions—while driving, at stops, in neutral, even when accelerator not touched. One owner reports timing gear failure at 2,000 miles during deceleration event with check engine light.
When: Occurs randomly over extended periods (one owner reports 20+ times over 3 years; last occurrence 1/21/10). Another instance at 2,000 miles.
Symptoms owners cite: Engine revs up without pedal input; Random acceleration and deceleration without pattern; Happens in any driving condition: moving, turning, stopped, neutral; Check engine light may illuminate; Loss of throttle response reported in at least one case
Codes mentioned: Check engine light codes not specified in narratives
Repairs/costs cited: One owner reports dealership advised timing gear failure requiring replacement (vehicle not repaired). No repair costs cited. Mechanics cannot diagnose without observing the event.
Accelerator Pedal (Drive-by-Wire) Responsiveness Loss
Accelerator pedal depressing has intermittent or no effect, lasting anywhere from seconds to extended periods. Check engine light illuminates. Owner found online reports of same problem in other 2007 Yaris vehicles.
When: Occasional intermittent events; multiple occurrences reported
Symptoms owners cite: Pedal depression has no initial effect or minimal effect; Check engine light illumination during event; Intermittent throttle response loss
Codes mentioned: Check engine light (specific codes not provided)
Alternator Failure and Fire
Alternator caught fire while vehicle was parked in driveway. Owner detected burning smell and smoke from under hood, found alternator on fire, extinguished with water.
When: Low mileage reported in one similar narrative (15,000 miles for serpentine belt issue, possibly related)
Symptoms owners cite: Battery warning light illuminated; Burning smell; Smoke and fire from alternator
Repairs/costs cited: Alternator required replacement. Owner extinguished fire before damage assessment complete.
Serpentine Belt Slippage and Loosening
Serpentine belt slips and becomes loose. Failure recurs on multiple occasions after dealer tightening.
When: First occurrence at 15,000 miles; recurrent problem with multiple slip events
Symptoms owners cite: Serpentine belt slips; Belt becomes loose
Repairs/costs cited: Dealer tightened belt. Problem recurred multiple times, suggesting root cause not addressed (possible pulley misalignment, wear, or tensioner failure).
Recalls/TSBs owners mention: Manufacturer was notified of failure.
A/C Condensate Drain Clogging and Water Intrusion
Air conditioning system drain line becomes clogged, allowing water to pool on the passenger side cabin floor. Problem recurs within weeks after repair and repeated manual cleaning.
When: Occurs when air conditioner is in use; first repair ~$200, recurrence within one month
Symptoms owners cite: Water pooling on passenger side cabin floor; A/C drain line clogging; Recurrent blockage after cleaning
Repairs/costs cited: Dealer charged ~$200 for initial repair. Owner has manually removed and cleaned line multiple times; problem returns repeatedly.
Check Engine Light Illumination (Undiagnosed)
Engine warning light illuminated; owner did not pursue diagnosis or repair. No other symptoms reported.
When: At 87,000 miles
Symptoms owners cite: Check engine light illuminated
Codes mentioned: Not diagnosed
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
Tl* the contact owns a 2007 Toyota yaris. The contact stated that the engine warning light illuminated. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the issue. The failure mileage was 87,000.
Had engine trouble with your 2007 Toyota Yaris?
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 2007 Toyota Yaris?
It's a meaningful issue. 11 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Across the 8 complaints that reported odometer mileage, most engine failures cluster between 20,000 and 98,000 miles, with the median around 85,000. A quarter of owners report trouble before 20,000; a quarter make it past 98,000. 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/2007/Toyota/Yaris.
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.