Toyota Highlander
2.5L four-cylinder for Camry XV50 and Highlander. Oil consumption issue from low-tension piston rings — Toyota issued TSB and settled a class action. 2012 models: camshaft gear cold rattle documented via TSB. Water pump with plastic impeller wears out. Overall solid after warranty repairs.
Highlander XU40 four-cylinder — frugal but weak
187 hp four-cylinder in the Highlander: works, doesn't excite. Acceptable for urban use without towing.
Engine Weaknesses 3
TSB 0194-14: Toyota extended warranty. Low-tension piston rings, same root cause as predecessor 2AZ-FE.
Symptoms: Oil level drop between changes, blue smoke possible
Impeller wears, seals degrade. Standard replacement from ~80k miles.
Symptoms: Coolant loss, drip under engine
TSB T-SB-0041-13: brief knocking on cold start. Camshaft gear unit needs replacement. 2012 model year only.
Symptoms: Brief knocking/rattle on cold start, disappears after seconds
Vehicle Weaknesses 3
On hybrid variants, the inverter can fail at high mileage. Expensive component, complex replacement.
Front struts wear faster than expected, especially on rough roads.
Brake rotors warp well below 60k miles. Accelerated on heavy vehicle under load.