There are 2 owner-reported lighting complaints for the 2006 Toyota 4Runnerin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The vehicle headlights have failed on multiple occasions. The cause of the failures was ingress of water into the sealed headlamp assembly. The problem was reported to Toyota. Toyota took no action regarding the reports. The entire headlight assembly was replaced three (3) times at our expense. The problem persists. Attached is a photograph of the second (replaced) clearly showing water inside the headlight assembly. The current (most recent replacement) has also experienced water ingress and is available for inspection. The subject vehicle was inspected by three different body shops (two if which are authorized Toyota shops). It was confirmed by all three shops that there is no vehicle design feature that could cause water ingress in the headlamp assembly. This is a serious safety issue and has been brought to Toyota's attention with no response.
I RECENTLY PURCHASED A NEW 2006 TOYOTA 4 RUNNER. I HAVE HAD NOTHING BUT MOTOR TRANSMISSION, ELECTRICAL FAILURES. I HAVE ONLY HAD MY VEHICLE FOR 1 MONTH AND ANYTHING AND EVERY THING HAS GONE WRONG. I EVEN HAD TO GIVE MY DAUGHTER CPR ON THE SIDE OF THE ROAD DUE TO CARBON MONOXIDE INHALATION. SHE WENT INTO RESPIRATORY FAILURE DO TO THIS SHE HAS SEVERE ASTHMA. *JB
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026