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 ↗2009 Toyota Highlander engine problems
severe 22 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
22
Recalls
0
Avg fix
$3,100
3fires
1injury
When does it fail?
Of the 22 engine complaints filed for the 2009 Toyota Highlander, 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
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.
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full bulletin at NHTSA ↗TSB: OBSOLETE NOTICE August 11, 2020: This bulletin is no longer applicable and is now obsolete.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
The dominant problem across these 22 complaints is catastrophic failure of the rubber oil cooler hose or pipe connecting to the engine block. Owners report sudden oil loss while driving on highways and interstates, with oil draining completely within seconds. One owner lost all oil within 20 minutes of parking. The failure occurs across a wide mileage range—as early as 40 miles on a new vehicle, and up to 78,000+ miles. When this happens while driving, owners get a low-oil-pressure warning and lose power mid-traffic, creating serious highway safety hazards.
Toyota issued Technical Service Bulletin T-SB-0201-11 addressing the repair, and the replacement part is metal rather than rubber, confirming the original design was defective. However, Toyota has not issued a recall. Dealers report this is a "known issue"—one owner found it documented on Toyota forums. Coverage varies: some repairs are warranty-covered if done at a dealership within a specific timeframe; others are denied for mileage overage or when performed elsewhere.
The danger doesn't end at repair. Several owners report rod knock or complete engine seizure weeks or months after the oil loss, requiring full engine replacement. One case involved a 105,000-mile vehicle with perfect maintenance history that seized with zero prior warning. Others report knocking sounds and grinding noises—cold-start and VVT-related. One vehicle experienced an engine fire. Water pump failures and coolant pump pulley breakage are also reported, with one repair bill exceeding $9,000.
Same Toyota Highlander engine reports on nearby years: 2006 · 2008 · 2010 · 2011
Failure modes owners describe
Oil cooler pipe/hose failure with catastrophic oil loss
Rubber oil cooler hoses and pipes connecting the oil cooler to the engine block rupture, burst, or develop holes, causing rapid and complete oil loss. Some owners report the original rubber hose is replaced with a metal part, indicating a design defect. The failure can occur while driving or while parked, draining all engine oil within seconds to minutes.
When: Varies widely: reported between 40 miles (new vehicle) to 78,000+ miles; failures occur both while driving (highway and local) and while parked
Symptoms owners cite: Sudden low oil pressure warning light or alert on dashboard; Oil dripping or pooling under vehicle; Large oil puddles in driveway or under parked car; Oil leaking from grill and undercarriage; Complete oil loss on dipstick; Engine knock or knocking sounds after prolonged low oil condition
Codes mentioned: Low oil pressure warning, Traction control light activation
Repairs/costs cited: Oil cooler pipe replacement required. One owner reported ~$1,000 out-of-pocket cost. Replacement parts are metal instead of rubber. Toyota issued Technical Service Bulletin T-SB-0201-11 over 5 years before some complaints. Some repairs covered under warranty; others denied for mileage overage (2,700 miles over limit). Dealership noted 3-week lead time for parts. Post-repair engine damage (rod knock, full seizure) may require complete engine replacement.
Recalls/TSBs owners mention: Toyota Technical Service Bulletin T-SB-0201-11 issued addressing repair procedure. Toyota issued warranty enhancement letter (ZE2) that some owners report not receiving. Toyota refused to recall despite dealership staff agreeing it warrants recall status. Some repairs covered under warranty programs with limited time frame; others denied for mileage reasons. Toyota customer support program exists but has restrictions on coverage and who performs repair.
Engine seizure from oil starvation
Engine completely seizes and will not start, diagnosed as result of catastrophic oil loss (from cooler pipe failure) or oil port clogging. One case involved a fully maintained, low-mileage engine with no prior warning signs that suddenly seized after 0.6 miles of driving.
When: One case at 105,000 miles with regular 7,000-mile synthetic oil changes; another at 40 miles (new vehicle); timing varies with oil cooler failure incidents
Symptoms owners cite: Engine running rough then dying without warning; Engine will not start after stalling; No prior warning lights or engine noise; Complete loss of engine function
Repairs/costs cited: Requires engine replacement—described as 'extensive and very expensive repair.' One 2016 case diagnosed as rod knock resulting from March oil cooler leak; full engine replacement required. Another 105,000-mile case: mechanic theorized oil port clogging or oil pump failure after seizure.
Recalls/TSBs owners mention: Toyota offered no satisfaction when vehicle repaired outside dealership or out of warranty. No recall issued.
Rod knock from prolonged low-oil operation
After oil cooler pipe fails and oil drains, engine sustains internal damage (rod knock). Typically diagnosed weeks or months after the initial oil loss incident when owner returns to dealer reporting loud knocking on acceleration.
When: Manifests after oil cooler failure; one case occurred 4 months after initial March 2016 oil cooler pipe replacement
Symptoms owners cite: Loud knocking sound upon fast acceleration; Knocking noise from engine compartment
Repairs/costs cited: Requires engine replacement. One case cost Toyota dealership repair estimated at high cost; another required full engine replacement after rod knock diagnosis.
Recalls/TSBs owners mention: Dealership replaced oil cooler pipe under warranty per TSB-0201-11 but assured owner no 'apparent' damage; rod knock emerged later, now requiring engine replacement.
Front O2 sensor ceramic defect with fire risk
Defective front oxygen sensor made of ceramic fails internally, causing engine overheating and fire. Occurs within 40 miles of new vehicle delivery. Dealer general manager confirmed Toyota knows of the defect but will not recall.
When: Within 3 days and 40 miles of new vehicle delivery
Symptoms owners cite: Traction control light illuminates; Sensor overheats; Engine catches fire; Car will not start
Repairs/costs cited: Sensor replacement performed. Dealership would not refund; owner's only option was trade-in at owner's cost.
Recalls/TSBs owners mention: Dealership general manager stated Toyota knows of defect but will not issue recall. No recall issued.
Engine fire
Vehicle caught fire from the engine bay while parked. Fire department responded. Cause not specified in complaint.
When: January 22, 2010, 20 minutes after parking vehicle
Symptoms owners cite: 6-foot high flames from engine; Fire visible from outside vehicle
Water pump failure with grinding noise
Water pump fails prematurely, producing grinding noise described as sound of gravel in motor. Owner research indicates this is a known problem with other vehicles experiencing the same failure.
When: Timing not specified
Symptoms owners cite: Grinding or gravel-like noise from engine; Sound present during operation
Repairs/costs cited: Water pump replaced under warranty.
Recalls/TSBs owners mention: Toyota replaced pump under warranty; no TSB or recall mentioned.
VVT (Variable Valve Timing) rubber hose rupture and replacement
Rubber hose connecting oil pump to VVT system breaks repeatedly. Has been replaced with metal hose in redesign, indicating original design defect.
When: Timing not specified; occurs around 60,000 miles based on context of complaint #19
Symptoms owners cite: Hose breakage (specific symptoms not detailed)
Repairs/costs cited: Replacement hose is metal instead of rubber, indicating design correction.
VVT cam gear grinding noise
Variable valve timing camshaft gear produces grinding noise. Vehicle hits 60,000 miles and is out of warranty; earlier Toyota technical service bulletin did not address issue because vehicle showed no prior warning signs.
When: At or around 60,000 miles
Symptoms owners cite: Grinding noise from camshaft area
Repairs/costs cited: Owner out of warranty; no remedy specified in complaint.
Recalls/TSBs owners mention: Earlier TSB from Toyota did not cover this condition since no warning signs were present prior to grinding noise.
Coolant pump pulley failure with engine overheating
Coolant pump pulley breaks, causing engine overheating and failure on highway. Vehicle stranded and required towing. Dealer reports both engine and water pump require replacement.
When: Before 60,000 miles
Symptoms owners cite: Engine overheating; Engine stops on highway; Pulley breakage
Repairs/costs cited: Engine and water pump replacement required; dealer estimates over $9,000 repair cost.
Engine knock/rattle at cold startup
Engine produces brief knocking or rattling noise upon initial cold startup. Some cases report this noise continues even after engine reaches operating temperature, contrary to dealership claim that cold-start noise is normal.
When: Upon engine startup, sometimes persistent even when warm
Symptoms owners cite: Brief engine knock/rattle noise at cold startup; Metallic grinding noise until oil circulates; Noise persists even at engine operating temperature in some cases
Codes mentioned: DA41A, ZA3EH
Recalls/TSBs owners mention: Dealer claimed noise is normal due to cold starts; Toyota refuses to remedy when noise occurs at operating temperature.
Engine oil filler cap interior part melting and ejection
An interior motor part near the oil filler cap melts through and nearly becomes a projectile while driving. Causes braking, traction control, and stability control systems to engage; engine nearly fails. Incident occurred at low speed entering parking lot.
When: At 10 mph entering parking lot
Symptoms owners cite: Interior motor part melts and protrudes from oil filler cap; 2-inch cylindrical part visible when hood opened; Braking, traction, and stability control lights engage; Engine nearly fails
Intermittent vibration and loud noise at highway speeds
Sudden onset of severe vibration and loud noise while driving 50–60 mph on highway. Vibration described as feeling like driving over speed bumps on smooth road. Occurred twice in owner experience but could not be reproduced during dealership test drive or multi-point inspection.
When: At 50–60 mph highway speeds; occurred twice since purchase over 1 month
Symptoms owners cite: Severe vibration throughout vehicle; Loud noise (described as extremely loud); Vibration and noise occur together at highway speeds; Cannot reproduce at lower speeds or in dealership testing
Repairs/costs cited: Multi-point inspection and test drive performed with no findings; issue recurred only twice and could not be diagnosed.
Synthesized from 22 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
Noticed large oil puddle in driveway. Had car towed as oil loss could have caused fatal damage to the engine. The oil line was diagnosed as dry rotted and needed to be replaced. The replacement oil line was vastly different than that of the original line indicating a problem with the previous design. The leak began while driving and we were able to trace the oil for miles leading home. The…
2009 highlander, purchased new, had 105000 miles on 3.5l v6 engine. Oil changed every 7000 miles, fully synthetic. No warning lights or engine noises prior to incident. Car started after work, drove .6 mile. Started running very rough, pulled over to shoulder thinking I had a flat tire. Car died before finishing maneuver, coasted to shoulder. Engine would not start. Towed to repair shop,…
When starting it would make grinding noise,sounds like metallic noise until the engine oil starts circulating.Dealer said that its normal due to cold starts but this can happen even when the engine is up to temperature.Toyota refuse to remedy the issue.
I was traveling 50 -60 miles per hour on the new jersey garden state parkway. While driving all of a sudden a huge vibration occurred through out the vehicle. While it vibrated a loud noise occurred. It was so loud my dog began to bark and my ears could not take the noise of the vehicle. I tried to brake and the noise continued as well as the vibration. I continued to try and get in the…
Had engine trouble with your 2009 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 2009 Toyota Highlander?
It's a meaningful issue. 22 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 18 complaints that reported odometer mileage, most engine failures cluster between 60,000 and 111,503 miles, with the median around 87,036. A quarter of owners report trouble before 60,000; a quarter make it past 111,503. 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/2009/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.