1999 Toyota 4 Runner: Reliability Data

Source: NHTSA — 134 complaints
134
Total Complaints
72,505mi
Median Mileage
TIRES
Top Issue
22
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

57,735 25th Percentile
72,505 Median Mileage
97,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

TIRES
18
AIR BAGS:FRONTAL
9
TIRES:TREAD/BELT
8
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
7
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP
7
FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
5
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR
4
FUEL SYSTEM, OTHER
4
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC
3
SUSPENSION:FRONT
3

Severity Assessment

22
Crashes
4
Fires
18
Injuries
0
Deaths

Sample Complaint Reports

"ENGINE STALLS WHILE VEHICLE IN OPERATION. STALLING OCCURS DURING DECELERATION (E.G. APPROACHING A TOLL BOOTH) AND ACCELERATION (E.G. ACCELERATING AFTER MAKING A FULL STOP). FAILURES ARE SPORADIC AND RANDOM (3X/MONTH). DEALER CLAIMS TO HAVE 4 TO 5 VEHICLES (SAME MAKE AND MODEL) WITH SAME PROBLEM. DEA..."
"THE FOLLOWING WORK ORDER WAS GIVEN TO ME. FOUND DCT # PO420 INEFFECIENT CATALYTIC CONVERTER. TESTED A/F SENSOR IT WAS GOOD, IT MEASURED 1.8 OHMS. TESTED 02 SENSOR IT MEASURED 19.0 OHMS N@ 1800 DEGREES. DIAGNOSED SWITCHED GROUNDS AT E.C.U. E10 # 8 AND # 17 . REMOVED AND SWITCHED WIRES TO THE CORRECT ..."
"THE FOLLOWING WORK ORDER WAS GIVEN TO ME. FOUND DCT # PO420 INEFFECIENT CATALYTIC CONVERTER. TESTED A/F SENSOR IT WAS GOOD, IT MEASURED 1.8 OHMS. TESTED 02 SENSOR IT MEASURED 19.0 OHMS N@ 1800 DEGREES. DIAGNOSED SWITCHED GROUNDS AT E.C.U. E10 # 8 AND # 17 . REMOVED AND SWITCHED WIRES TO THE CORRECT ..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28