This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
full bulletin at NHTSA ↗2010 Toyota Highlander engine problems
severe 14 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
14
Recalls
0
Avg fix
$3,100
1fire
When does it fail?
Of the 14 engine complaints filed for the 2010 Toyota Highlander, here's the actual mileage breakdown — failures cluster heaviest at 125,000-150,000 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 7 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.
This Service Bulletin provides updated non-electric water pump leak inspection and diagnostic tips for some 2008 – 2025 model year Toyota vehicles.
full bulletin at NHTSA ↗This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the Toyota Complete Maintenance Care (TCMC) website.
full bulletin at NHTSA ↗TT: HVAC drain tube is found to be blocked/clogged.
full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners describe multiple distinct failure modes that create safety concerns. The most frequent complaint is oil cooler line rupture: the hose fails suddenly with no warning, oil drains completely, and the oil pressure warning light either doesn't activate or comes on only after catastrophic loss. Owners report being stranded, needing towing, and facing denial of warranty coverage.
Ignition coil failures cause sudden, complete shutdown with no restart capability—a genuine hazard, especially on hybrid models where engine stall means total power loss. One owner's coil failed at just 25,400 miles on a regularly maintained vehicle.
Uncontrolled engine surging persists even after factory recall for the accelerator. One owner reports the dealer and Toyota corporate confirmed the behavior but ultimately told him it was normal transmission operation, despite 3+ weeks of failed diagnostic attempts.
Unexplained stalling at low speeds occurs across multiple mileages and on different service visits. Water pump rust and fracture has been documented. One owner reports engine fire with total vehicle loss. Another describes complete engine seizure with no oil or water present, despite claimed regular maintenance.
These are unverified consumer allegations, but the pattern—particularly with oil cooler failures and their hazardous presentation—warrants investigation before purchase.
Same Toyota Highlander engine reports on nearby years: 2008 · 2009 · 2011 · 2013
Failure modes owners describe
Engine surge and rpm jumping
Tachometer spikes to 5000+ RPM while driving at steady speed or coasting, occurs at all speeds and with/without cruise control. Persists even after factory recall for gas pedal. No diagnostic codes generated. Dealer confirmed the behavior but eventually claimed it was normal transmission shift behavior. Reported as progressive and hazardous.
When: Less than 1 year old; every drive
Symptoms owners cite: Uncontrolled rpm spikes to 5000 RPM; Surging at steady speeds; Surging off-throttle; Behavior occurs with and without cruise control
Repairs/costs cited: Dealership service had vehicle 3+ weeks, worked with Toyota corporate technicians, could reproduce the issue but made no repair; later claimed normal operation
Recalls/TSBs owners mention: Gas pedal recall applied; Toyota corporate and dealer eventually stated this was normal transmission behavior per their investigation
Oil cooler line failure and oil loss
Oil cooler hose ruptures causing sudden, catastrophic oil loss with no warning light activation before failure. Dip stick reads bone-dry while driving; some units show oil pressure warning light flashing after loss becomes extreme. Oil pours out immediately when refilled. Owners report this as widespread issue without recall coverage.
When: 55,973 miles to 158,297 miles; occurs without warning during normal driving
Symptoms owners cite: Sudden oil loss; No oil warning light before failure; Oil pressure warning light illuminating after loss; Smoke from engine bay; Oil pooling under vehicle
Repairs/costs cited: Oil cooler hose replaced; costs not specified. Multiple owners report this failure not covered under warranty despite mileage being borderline
Recalls/TSBs owners mention: Warranty denial; no recall issued despite owner reports of pattern; manufacturer contacted but offered no remedy
Ignition coil failure
Coil pack fails without warning, causing immediate complete engine shutdown with no restart capability. Occurs at 25,400 miles and 80,000 miles on regularly maintained vehicles. Hybrid models particularly dangerous because engine stall means total loss of power (unlike conventional hybrids).
When: 25,400 miles; 80,000 miles
Symptoms owners cite: Sudden engine shutdown without warning; Complete power loss; No restart possible until repair
Repairs/costs cited: Coil pack replaced; one owner also had battery replaced as part of repair
Uncontrolled engine acceleration and forward motion
Engine revs uncontrollably while at traffic light with foot fully on brake pedal. Vehicle moves forward despite brake application. Owner had to shift to Park and turn off ignition to stop the surge.
When: <UNKNOWN>
Symptoms owners cite: Uncontrolled engine rev at idle; Forward motion despite brake pedal applied; No throttle input from driver
Stalling at low mileage
Unexplained engine stalls occurring at low speeds (30-40 MPH) without warning. One case at 3,000 miles with stall recurring multiple times, undiagnosed and unrepaired. Another at 77,000 miles initially diagnosed as wheel bearing sensor, but problem recurred after three dealer visits.
When: 3,000 miles; 25,400 miles; 77,000 miles
Symptoms owners cite: Sudden stalling at low speed; No warning lights; Stall recurrence after restart
Repairs/costs cited: Wheel bearing sensor replaced in one case, but failure recurred on multiple occasions; other stalls unrepaired
Recalls/TSBs owners mention: Manufacturer notified; warranty recall check performed (VIN not included in recall)
Oil burning and stalling
Vehicle burns oil causing stalling without warning during highway driving. No diagnostic codes present. Owner suspects oil burning caused stall event but did not pursue repair.
When: 158,297 miles
Symptoms owners cite: Excessive oil consumption; Stalling without warning
Repairs/costs cited: Not repaired
Recalls/TSBs owners mention: Manufacturer informed VIN not in recall database
Water pump rust and fracture
Water pump rusts and fractures, creating rattling noise from underneath vehicle during operation. Detected at 55,973 miles during normal driving.
When: 55,973 miles
Symptoms owners cite: Rattling noise from underneath vehicle at 60 MPH
Repairs/costs cited: Water pump replaced
Engine lock-up and seizure
Engine seized completely with no oil or water present in engine. Vehicle required towing. Owner reports regular maintenance every 3-4 months.
When: <UNKNOWN>
Symptoms owners cite: Engine locked up and seized; No oil in engine; No water in engine
Repairs/costs cited: Towed for repair; details not provided
Engine fire and total loss
Engine caught fire while driving, completely destroying the vehicle. No other details provided by owner.
When: <UNKNOWN>
Symptoms owners cite: Engine fire; Total vehicle loss
Repairs/costs cited: Total loss
Synthesized from 14 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 1 most recent
We were traveling on the interstate after about a 7 hour drive and the low oil pressure warning display was flickering on and off but never stayed on consistently. I pulled over and there was no oil in the engine, I mean it was bone dry. I'm truly surprised the car was still operating. When oil was put in, it poured, and I mean poured, right back out. We had to be towed because the car could not…
Had engine trouble with your 2010 Toyota Highlander?
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 Toyota Highlander?
It's a meaningful issue. 14 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 12 complaints that reported odometer mileage, most engine failures cluster between 25,400 and 129,000 miles, with the median around 81,000. A quarter of owners report trouble before 25,400; a quarter make it past 129,000. 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/Toyota/Highlander.
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.