What are the common problems of a 2005 Toyota Highlander?

Typical issues reported for the 2005 Highlander include transmission wear and shifting problems, oil consumption on some engines, cooling-system leaks, electrical faults, and suspension wear. These problems are common as the vehicle ages and miles accumulate on a first-generation Highlander.

The 2005 Highlander was offered with two engines: a 2.4-liter four-cylinder (2AZ-FE) and a larger V6 (3.0-liter 1MZ-FE or 3.3-liter 3MZ-FE in earlier/Late models). With many examples now well into high mileage, owners frequently encounter drivetrain, engine, cooling, electrical, and suspension-related failures. The following lists summarize the issues most often cited by owners and repair shops, along with what to watch for and how to approach maintenance or repair.

Transmission and drivetrain problems

Below are the issues most commonly reported with the automatic transmission and drivetrain on 2005 Highlanders, especially as mileage climbs. Watch for symptoms early to avoid costly repairs.

• Slipping, hard shifting, or delayed engagement in the automatic transmission, particularly with higher mileage.


• Torque converter shudder or transmission fluid changes that don’t resolve shifting behavior.


• Automatic transmission fluid leaks from the pan, seals, or cooler lines, which can lead to low fluid and slipping.


• All-wheel-drive (AWD) systems showing noise, binding, or vibration due to center differential or coupling wear (common in AWD models).


• Front-wheel-drive CV axle wear or boot leaks causing clicking during turns or vibration.

Concluding: Transmission and drivetrain issues typically surface between 100,000 and 200,000 miles, but proper maintenance, timely fluid changes, and addressing leaks early can extend transmission life and maintain drivability.

Engine, oil consumption, and emissions concerns

This section covers engine performance, lubrication, and emissions-related problems reported for 2005 Highlanders. Regular monitoring can help prevent major failures.

• Excessive oil consumption reported on some 2AZ-FE four-cylinder engines as they age, necessitating more frequent top-offs and, in some cases, more thorough inspection.


• P030X misfire codes or rough running due to ignition components (spark plugs, ignition coils) or fuel delivery issues.


• Oil leaks around valve covers, oil pan, or gaskets, which can lead to low oil levels and potential engine damage if ignored.


• Check engine light or stored codes related to oxygen sensors or the catalytic converter, often tied to aging sensors or exhaust leaks.


• Timing belt wear on 2AZ-FE-powered models (early 2000s Highlanders relied on timing belts). If due for replacement, belt failure can cause severe engine damage; adherence to the manufacturer’s interval is crucial.

Concluding: Engine-related problems are frequently tied to aging seals, belts, and sensors. Regular maintenance, timely belt changes on applicable engines, and prompt addressing of oil consumption or misfires can reduce the risk of major engine problems.

Cooling system and HVAC concerns

Cooling system reliability and air conditioning performance are common trouble spots as the vehicle ages. Here’s what owners often report and how to mitigate it.

• Water pump leaks around the V6 engines (3MZ-FE) and associated cooling system symptoms, such as overheating or coolant puddles under the vehicle.


• Radiator hose or hose clamp failures leading to leaks and potential overheating.


• Thermostat or thermostat housing failures causing slow warm-up or overheating under load.


• Cooling fan clutch or electric cooling fan failures resulting in insufficient cooling at idle or in traffic.


• A/C compressor clutch, expansion valve, or refrigerant leaks causing reduced cooling performance.

Concluding: Cooling and HVAC issues can stem from aging seals, hoses, and components. Regular coolant flushes, inspection of the water pump and radiator, and attention to AC performance can prevent overheating and loss of cabin comfort.

Electrical system and interior electronics

Electrical gremlins and worn components are a recurring theme in older Highlanders. The following items are among the most frequently cited by owners and technicians.

• ABS/traction control lights coming on due to wheel-speed sensor or ABS module issues, sometimes accompanied by brake feel changes.


• Faulty or aging electrical connectors, fuses, and relays leading to intermittent power loss or non-functioning accessories (windows, mirrors, seats).


• Power window regulators or motor failures causing slow or stuck window operation.


• Alternator or battery problems causing intermittent starting issues or dim lights, particularly in high-mileage vehicles.


• Headlight/taillight bulb wear and harness corrosion contributing to electrical faults in lighting.

Concluding: Electrical problems on a 2005 Highlander are often caused by aging connectors, sensors, and components. Routine electrical system checks and proactive replacement of worn parts can reduce surprises at the worst times.

Suspension, steering, and braking concerns

Suspension and brake components are subject to wear as the Highlander ages. The most commonly reported failures include:

• Worn rear shocks or struts leading to a bouncy ride and reduced stability on rough roads.


• Worn front suspension parts such as control arm bushings or ball joints causing clunking noises or imprecise steering feel.


• Brake wear including warped rotors or worn pads that cause pulsation or reduced braking efficiency, especially with high-mileage vehicles.


• Wheel bearing failures new noise (humming or grinding) at certain speeds or loads.


• Power steering rack leaks or hose/clamp issues leading to power assist loss, particularly on older models.

Concluding: Regular inspection of the steering, suspension, and braking system is essential. Replacing worn components before they fail can improve ride quality, handling, and safety.

Summary

The 2005 Toyota Highlander, a member of the first-generation lineup, is known for solid reliability but, like many aging mid-size SUVs, accumulates issues with mileage. Transmission and drivetrain trouble, engine oil consumption, cooling-system and HVAC faults, electrical glitches, and suspension/brake wear are among the most commonly reported areas. Prospective buyers or current owners should prioritize a thorough pre-purchase inspection or routine maintenance history review, with particular attention to the transmission, belts and hoses, cooling components, electrical connectors, and suspension parts. Regular servicing and addressing problems early can help extend the life of a 2005 Highlander and maintain its performance on the road.

Is a 2005 Toyota Highlander a good vehicle?

The 2005 Toyota Highlander is consistently praised for its reliability, safety, and family-friendly design, making it a great long-term value for many owners. Common positive points include a smooth ride, good visibility, and ample storage space, although the base four-cylinder engine can feel underpowered. Common complaints include some interior plastic quality, occasional brake squeaks, and a minor issue with the heater/AC temperature control.
 
This video provides a detailed walkthrough of a 2005 Toyota Highlander, including its interior and exterior features: 47sDirect Auto OutletYouTube · Jan 22, 2025
Pros

• Reliability: The Highlander is highly reliable, with many owners reporting long-term use with few major issues, even reaching high mileage. 
• Safety: It is regarded as a safe vehicle with good visibility and a reputation for protecting occupants. 
• Comfort and Ride: Drivers consistently describe the ride as smooth, quiet, and car-like, making it a comfortable vehicle for daily use and long trips. 
• Space: It offers good interior space, including a spacious cargo area and an optional, though small, third row on some models. 
• Versatility: The vehicle is versatile, capable of handling family duties and some light-duty towing. 
• DIY Friendly: Many reviewers note that the Highlander is easy and affordable to maintain, even for DIY-friendly owners. 

Cons

• Performance: The base four-cylinder engine is considered underpowered, and acceleration can be slow. However, the V6 engine is noted as being smooth and having sufficient power. 
• Minor Issues: Some owners report minor, non-critical problems such as brake squeaks, occasional heater/AC temperature control issues, and a small horn sound. 
• Interior Materials: The interior can feel basic with some cheap-feeling plastics, though the cloth upholstery is often noted as being durable. 
• Tires: Some original equipment tires were criticized for poor traction in wet conditions, and upgrades were recommended. 

What problems did the 2005 Highlander have?

Owner Reported Trouble Spots

• Climate System. AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
• Electrical Accessories.
• Suspension/Steering.
• Engine Minor.
• Brakes.
• Exhaust.
• Engine Major.
• Engine Cooling.

How many miles does a 2005 Toyota Highlander last?

300,000 miles
How Long Does a Toyota Highlander Last? The Toyota Highlander is one of the longest-lasting midsize SUVs available, with the ability to continue running up to 300,000 miles after your drive it off the lot.

What year to stay away from a Toyota Highlander?

Years to avoid in the Toyota Highlander include 2003, 2008, 2014, 2015, and 2020 due to common issues like transmission problems, oil leaks, and technology glitches. Other problematic years to consider are 2001-2007 (engine and climate control issues) and 2016-2019 (varying issues including potential oil leaks in some models).
 
This video discusses problems with the Toyota Highlander from 2020 to 2025, including paint issues: 54sCarnivautoYouTube · Feb 11, 2025
Toyota Highlander years to avoid

• 2001–2007: Prone to engine overheating, head gasket failures, and climate control issues like AC compressor and blower motor problems. 
• 2003: A big year for issues, particularly engine oil sludge buildup and premature transmission wear, according to Regan Motors Inc and Clutch. 
• 2008: A redesigned model that experienced oil cooler line leaks, which can cause engine damage if not addressed, and lower-quality interior components. 
• 2014: A recall was issued for the second-row seat assembly that may not lock correctly into the seat track, and there were also reports of issues that might be linked to the transmission, says Clutch and Reddit users. 
• 2015: Experienced growing pains from its redesign, with various reports of growing issues, according to Regan Motors Inc and Clutch. 
• 2020: Experienced early transmission and software problems, say Clutch and Reddit users. 

You can watch this video to learn more about common problems with the 2020-2025 Toyota Highlander: 51sChris DrivesYouTube · Jul 5, 2025