The 2012 Highlander is generally solid transportation, but the 2.7L I4 suffers catastrophic oil consumption issues leading to engine failure, while all models share transmission oil cooler and VVT-i gear problems that can sideline the vehicle unexpectedly.
2.7L I4 Excessive Oil Consumption & Piston Ring Failure
Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Blue smoke from exhaust on cold start or acceleration, Oil level drops 1+ quart between changes, Check engine light P0011/P0021 (VVT codes from oil starvation), Rough idle or misfires as rings collapse, Complete engine seizure if oil runs critically low
Fix: Toyota TSB 0094-11 acknowledged the issue but only covered some VINs. Repair requires complete engine teardown, new pistons and rings, honing cylinders—15-20 hours labor. Most shops recommend reman or used engine swap instead due to core damage. Engine rebuild: 18-24 hours. Short block replacement: 14-18 hours.
Estimated cost: $4,500-7,500
VVT-i Actuator Gear Failure (All Engines)
Common · medium severity
Typical onset: 80,000-150,000 mi
Symptoms: Loud rattling/knocking noise from engine at cold start lasting 5-15 seconds, Check engine light P0011, P0021, P0010, P0020, Timing chain slap sound, Rough idle after sitting overnight
Fix: The VVT gear teeth strip due to oil sludge or design weakness. Requires cam cover removal, timing cover access, replacing actuator gears on both banks (V6) or single (I4). 4-6 hours labor per bank. Use OEM Toyota parts only—aftermarket fails quickly.
Estimated cost: $800-1,600
Transmission Oil Cooler Line Failure
Common · high severity
Typical onset: 70,000-130,000 mi
Symptoms: Transmission fluid leaking from front of vehicle near radiator, Pink or red fluid puddles under car, Transmission slipping or delayed engagement, Overheating transmission temp warnings, Milky transmission fluid (if cooler leaks internally into coolant)
Fix: Steel lines rust through where they connect to radiator or corrode at crimp fittings. External leak: replace lines, flush system—2.5 hours. Internal leak (fluid mixing): requires radiator replacement, full trans flush, potential transmission damage inspection—5-7 hours total. Catch early or risk transmission failure.
Estimated cost: $400-900 (lines only); $1,800-2,800 (if radiator and trans contaminated)
Transmission Mount Failure
Occasional · low severity
Typical onset: 90,000-140,000 mi
Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration at idle in Drive, Excessive engine movement visible under hood during acceleration, Transmission seems to 'shift hard' on takeoff
Fix: Rubber mount deteriorates, allowing excessive drivetrain movement. Rear transmission mount most common culprit. Replacement requires supporting transmission, removing through-bolts—1.5-2 hours. Inspect all engine mounts while in there; they often fail together.
Estimated cost: $250-450
Power Steering Rack Leak
Occasional · medium severity
Typical onset: 100,000-160,000 mi
Symptoms: Power steering fluid dripping from inner tie rod boots, Whining noise when turning wheel, Steering feels heavy or requires more effort, Fluid level drops repeatedly
Fix: Inner rack seals fail, leaking fluid into bellows boots. Requires rack replacement—alignment, fluid flush, 3-4 hours labor. Rebuilt racks available but OEM lasts longer. Don't ignore—running low on fluid damages pump ($800+ additional).
Estimated cost: $900-1,500
Front Lower Control Arm Bushing Deterioration
Occasional · low severity
Typical onset: 80,000-120,000 mi
Symptoms: Clunking over bumps from front suspension, Steering wander or vehicle pulls to one side, Uneven tire wear on inside edge, Vibration through steering wheel at highway speeds
Fix: Rubber bushings crack and separate, especially in rust-belt climates. Replace entire control arm assemblies (bushings pressed in aren't cost-effective). 2-3 hours per side including alignment. Do both sides together—labor overlap saves money.
Estimated cost: $600-1,000
EVAP System Charcoal Canister Clogging (Hybrid Models)
Occasional · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Check engine light P0441, P0446, P0455 (EVAP codes), Difficulty fueling—pump clicks off repeatedly, Fuel tank hissing when opening cap, Strong fuel smell near rear of vehicle
Fix: Charcoal canister saturates from repeated short trips or topping off tank. Located under vehicle near fuel tank. Replacement: 1-1.5 hours. Must clear codes and run drive cycle. Tell customers to STOP topping off the tank—main cause of failure.
Estimated cost: $400-650
Owner tips
2.7L I4 owners: check oil every 1,000 miles religiously—this engine will destroy itself without warning if low
Use 0W-20 full synthetic oil only, 5,000-mile intervals maximum to prevent VVT actuator sludge
Flush transmission fluid every 60,000 miles—Toyota 'lifetime' fluid claim is marketing, not reality
Inspect transmission cooler lines annually for corrosion, especially in salt states
Replace engine air filter every 15,000 miles—dirty filter accelerates oil consumption on I4 engines
Buy the 3.5L V6 gas model only—avoid the 2.7L I4 entirely due to engine failure risk; otherwise a reliable family hauler if maintained properly.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: Standard top-post battery; located in engine bay
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Every control module on the 2008-2013 Toyota Highlander — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
📍 Rear cargo area, driver side trim panel or behind rear bumper
🔧 Techstream or Autel/Launch for sensor calibration
⚠️ Sensor calibration may be required depending on system type.
Backup Camera ECU (CAMERA ECU)0.8 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Rear liftgate area, integrated with camera assembly or behind trim
🔧 Techstream for guideline calibration
⚠️ Guideline calibration recommended but not always mandatory.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Southeast Toyota is recalling certain model year 2008 and 2010-2013 Toyota Tundra, 2010-2012 Rav4, 2012 Toyota Sequoia, 2010-2011 Toyota Corolla, 2010-2011 Toyota Camry and Camry Hybrid, 2010-2013 Toyota Highlander and Highlander Hybrid, 2010-2013 Toyota FJ Cruiser, 2011 Toyota Land Cruiser, 2010-2013 Toyota Venza, 2010-2011 Toyota 4Runner, 2010-2013 Toyota Tacoma, 2011-2012 Toyota Sienna, 2012 Toyota Prius, 2013 Scion FR-S, 2011 Scion XD, 2011 Scion XB, and 2012 Scion TC vehicles. These vehicles were sold with labels that were outside the allowable one percent of accuracy of actual weight added. Thus, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) Number 110, "Tire Selection and Rims."
Consequence: An inaccurate label could lead to owners overloading their vehicles and tires. An overloaded vehicle can result in a tire failure which may result in a vehicle crash, personal injury, or property damage.
Remedy: Southeast Toyota will notify owners and provide a corrected label with instructions concerning its installation. A small group of the affected vehicles will need additonal remedies which are still being developed. The recall began on May 28, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.
AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVE · 13V014000
2013-01-16
Southeast Toyota Distributors, LLC (SET) is recalling certain models interspersed through model years 2009 through 2013 as follows: model year 2009-2012 Tacoma, 4Runner, Camry, Camry Hybrid, Prius, and RAV4; model year 2009-2010 Avalon, FJ Cruiser, and Highlander Hybrid; model year 2010-2013 model year Corolla, Sienna and Tundra; model year 2009-2013 Highlander and Venza; model year 2012 Prius V; and model year 2010-2012 Sequoia. During modification by SET to include accessories such as leather seat covers, seat heaters or headrest DVD systems, these vehicles may not have had the passenger seat occupant sensing system calibration tested. Without passing the calibration test, the occupant sensing system may not operate as designed.
Consequence: If the front passenger seat occupant sensing system is out of calibration, the front passenger airbags may not deploy or they may deploy inappropriately for the passenger's size and position. This could increase the risk of personal injury during the event of a vehicle crash necessitating airbag deployment.
Remedy: Southeast Toyota will notify owners, and dealers will test the sensitivity of the occupant detection sensors, and recalibrate them as necessary. The recall began on March 21, 2013. Owners may contact Southeast Toyota at 1-800-301-6859.
Fuel economy (EPA)
City
18mpg
Highway
24mpg
Combined
20mpg
Fuel
Regular Gasoline
Capability & size
EPA class
Sport Utility Vehicle - 4WD
Wiper blades
2008-2013 generation (XU40). Standard hook-type attachment for front blades.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2012 Toyota Highlander 3.5L V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.