2006 Toyota 4Runner

Watch out for

Reputation: what owners and the press report. Tap one to see what to check.

• Frame rust All years Walk away if found

  What to check: Inspect the frame and the front lower control arm mounts.

  NHTSA found 15 complaints of control arm failure, 13 from road-salt states, and denied a defect petition in 2022. A class action over 2005 and later trucks was dismissed in 2023.

  Sources ^10,11

• Timing belt and water pump V8

  What to check: Ask for records.

  Due every 90,000 miles or 7 years.

  Sources ^12,3

• Air injection fault V8, 2005–2009 One source so far

  What to check: Scan for air injection codes such as P0418 and P2445.

  Toyota traces the fault to debris from the pump.

  Sources ¹³

• Cracked exhaust manifolds V8

  What to check: Listen for a ticking noise.

  Sources ^3,12

• X-REAS shock leaks Sport Edition. Optional on SR5 and Limited One source so far

  What to check: Look for oil weeping at each shock.

  Five owners in one thread report leaks in the X-REAS system, at about 50,000 to 66,000 miles where they say. A moderator notes the system is sealed and cannot be recharged.

  About $2,000 to replace. Four standard shocks cost one owner $289

  Sources ¹⁴

• 4WD actuator 4WD trucks One source so far

  What to check: Confirm it shifts into low range. Look for seepage at the actuator beside the transfer case.

  Two members in one buyer's-advice thread say to check it. One warns that an unused actuator can seize and is costly to fix, and the other calls a leak there a reason to walk away.

  Sources ¹²

• Rear air suspension Some Limited trucks One source so far

  Two members in one thread warn that the rear air bags are vulnerable: one to damage off-road, the other to wear when the truck is lifted. Neither reports a failure of their own. The thread gives no check.

  Sources ¹⁵

Recalls

• 11V113000 2003–2009

  An unsecured or wrong floor mat can trap the accelerator pedal.¹⁶

• 16V065000 2004–2006

  Side curtain airbags can deploy unexpectedly because of control module programming.¹⁶

Complaints

Owners filed 381 complaints about the 2006 with NHTSA.

28 said there had been a crash and 3 a fire.

The parts named most

• Structure 143
• Unknown or other 74
• Suspension 65
• Power train 30
• Air bags 24

and 26 other parts

Counted from NHTSA's complaints on 23 October 2026. These are owners' own reports, counted by the parts they named; one complaint can name several. NHTSA's list

Crash-test stars

• 2006 Toyota 4Runner 4-DR. Front: driver 4, passenger 4. Side: driver 5, passenger 5. Rollover: 3.

These stars come from NHTSA's tests before the 2011 model year. NHTSA says never to compare them with stars from its newer tests. Where NHTSA says so

Copied from NHTSA's ratings on 23 October 2026.

What buyers say

Reputation: what owners and the press report

• Sought after: V8 All years One source so far

  The only 4Runner generation with a V8. Enthusiasts are said to seek out a clean one.³

• Sought after: 2005 and later V8 2005–2009 One source so far

  35 more horsepower. Autotrader prefers a V8 from after the 2006 update.¹

• Sought after: 2006 and later V6 2006–2009 One source so far

  Five members in one thread believe Toyota changed the V6 head gasket around 2005 or 2006, two citing a part number change. None points to a Toyota bulletin, and one doubts it was fixed.¹⁷

• Avoid: Frame rust All years Walk away

  Both generations rust at the frame, worst where roads are salted, and rust can leave a frame unsafe. Toyota's frame rust program for its trucks did not include the 4Runner.^{18,19,3,10,11}

Before you pay

Open the buyer's checklist

Every warning and recall for this generation, with a box to tick.