2008-2016 Highlander Steering: Fixing the Gen 2 Clunk & Understanding Gen 3 EPS Issues

Critical Compatibility Warning: Two Different Generations

2008-2013 Highlander (2nd Gen): The Steering Clunk

If you own a second-generation Highlander, there's a high probability you've heard or will hear a distinct noise from the steering. This is the single most reported issue for this component.

Symptoms of Failure

• Clunking, popping, or knocking noise when turning the steering wheel. This is the primary symptom. It can happen when the vehicle is parked or moving at low speeds.
• Feeling a 'catch' or notchiness in the steering. The noise is often accompanied by a tactile sensation through the steering wheel.
• Looseness or excessive play in the steering wheel. The wheel may feel less connected to the road.
• Steering wheel does not return to center smoothly. Worn components in the shaft can create friction, preventing the wheel from returning to its straight-ahead position naturally.

Known Issue: Intermediate Steering Shaft Failure (TSB T-SB-0034-13)

The cause of the infamous clunk is a design flaw in the original intermediate steering shaft. This shaft has two universal joints (U-joints) and a sliding spline that allows it to change length as the suspension moves. Over time, the splines and U-joints wear out, creating excess play that results in the clunking noise.

Toyota acknowledged this issue by releasing Technical Service Bulletin (TSB) T-SB-0034-13. This bulletin instructed dealers on how to diagnose the noise and replace the faulty shaft with a newly designed part. The repair was covered under the basic 36-month/36,000-mile warranty, but many vehicles developed the issue long after the warranty expired. This problem was also the subject of a class-action lawsuit.

NHTSA Investigation on Detaching Steering Wheels

Between 2018 and 2023, the National Highway Traffic Safety Administration (NHTSA) investigated complaints of the steering column detaching on 2008-2013 Highlanders. In April 2024, NHTSA closed the investigation without issuing a recall. The agency found that the problem was rare (42 complaints out of over 700,000 vehicles) and likely caused by damage from previous collisions, not a manufacturing defect.

2014-2016 Highlander (3rd Gen): Electric Power Steering (EPS) Issues

The third-generation Highlander uses a fully Electric Power Steering (EPS) system. Its problems are typically electrical rather than mechanical.

Symptoms of Failure

• Sudden increase in steering effort (heavy steering). This indicates a loss of power assist.
• EPS or steering wheel warning light on the dashboard.
• Whining noise when turning the wheel. This can be caused by the electric motor.
• Vehicle's electrical system cycling on and off. Some owners have reported steering lock-ups related to broader electrical failures, sometimes traced to a loose battery ground wire.

Known Issue: EPS Control Unit Failure (Recall 15V144000)

Toyota issued a recall for certain 2015 Toyota Highlander models (along with other Toyota models) for a problem with the Electric Power Steering Electronic Control Unit (EPS ECU). A component on the ECU's circuit board may have been damaged during manufacturing, which could lead to a failure of the EPS system and a sudden loss of steering assist. Dealers were instructed to inspect the serial number on the steering column assembly or EPS ECU and replace it free of charge if it was within the affected range.

Buying a Used Steering Column: What to Check

For most owners, especially those with a 2008-2013 model, you likely only need the intermediate shaft, not the entire column assembly. For 2014-2016 models, the issue is often an integrated electronic part, making a used column a viable option.

For 2008-2013 Models (Intermediate Shaft):

• Verify the Part Number: The most important step is to get the correct, updated part. The original, faulty part is 45220-48170. The redesigned, improved part is 45220-48171. Prioritize finding a used part with the updated number.
• Check the U-Joints: Hold the shaft and try to move the U-joints by hand. They should be tight and smooth, with no clicking or notchiness. Any looseness means the part is already worn.
• Avoid Cheap Aftermarket Shafts: While tempting, cheap aftermarket intermediate shafts are known to fail quickly, sometimes developing the same clunking noise within a year. A good used OEM part is often a more reliable choice than a new, low-quality aftermarket one.

For All Models (Full Column Assembly):

• Inspect for Crash Damage: Look for any signs of bending, cracking, or stress marks on the column housing or mounting brackets. A column from a vehicle in a heavy frontal collision should be avoided.
• Test Mechanical Functions: If possible, check the tilt and telescoping functions. They should move smoothly and lock securely in place. A column that won't lock is dangerous.
• Check Electrical Connectors: Ensure all electrical connectors and wire harnesses are intact and not cut or damaged. Damaged wiring can be very difficult to repair.
• Verify Compatibility: The column must match your vehicle's options. Key factors include floor shift, keyless ignition (Smart Key), and adaptive cruise control. Provide your vehicle's VIN to the seller to ensure an exact match.

Cost of Replacement

Costs can vary significantly depending on whether you need the full column or just the intermediate shaft.

Replacement Overview & Difficulty

This overview covers the replacement of the intermediate shaft, which is the most common repair for the 2008-2013 Highlander.

• Difficulty: 3/5 (Moderate)
• Estimated Time: 1.5-2 hours for an experienced DIYer.
• Key Steps:
  1. Park the vehicle with the front wheels pointing straight ahead.
  2. CRITICAL: Secure the steering wheel so it cannot turn. Use the seatbelt or a steering wheel holder. If the wheel spins freely while the shaft is disconnected, you will damage the clock spring (spiral cable), which is an expensive repair.
  3. From inside the driver's footwell, locate the upper bolt on the intermediate shaft where it connects to the main steering column. Remove the 12mm bolt.
  4. From under the vehicle (it may be easier to remove the driver's side front wheel), locate the lower bolt where the shaft connects to the steering rack. Place matchmarks on the shaft and rack to ensure correct alignment, then remove the bolt.
  5. The shaft can now be collapsed and removed. It may require some wiggling or gentle prying to separate from the splines.
  6. Install the new shaft, making sure to align your matchmarks. Torque both bolts to spec (26 ft-lbf / 35 N*m).

Frequently Asked Questions (FAQ)

Part Number and Compatibility Guide