Total Complaints
312 filings
TOYOTA 4RUNNER · model year
312 NHTSA complaints, 17 crash reports for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 1999TOYOTA4RUNNER carries 312 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 17 crashes, 3 fires, 12 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1999 4RUNNER is structure:body with 73 filings, followed by suspension (56) and unknown or other (34). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.
NHTSA currently has 1 investigation file overlapping the 1999 4RUNNER. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page, a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
312 filings
Crashes Reported
17 reports
Source
NHTSA ODI
Federal complaints database
Above median complaint volume, review patterns below.
| Component | Count |
|---|---|
| STRUCTURE:BODY | 73 |
| SUSPENSION | 56 |
| UNKNOWN OR OTHER | 34 |
| STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS | 22 |
| STRUCTURE:FRAME AND MEMBERS | 16 |
| STEERING | 14 |
| FUEL SYSTEM, GASOLINE | 13 |
| POWER TRAIN | 12 |
| ELECTRICAL SYSTEM | 10 |
| FUEL/PROPULSION SYSTEM | 8 |
| SERVICE BRAKES | 7 |
| WHEELS | 7 |
| VEHICLE SPEED CONTROL | 4 |
| SUSPENSION:REAR | 3 |
| SEAT BELTS | 3 |
The frame above the RT rear tire has rusted completely through. It's where the rear end bolts to the frame, at a wedge welded to the frame with bolt holes in it. It's like it wants to flip over and darts left or right every time there's a dip or rough spot in the road. I chained it and put a tow strap around everything I could to keep the rear end from coming out & killing me or someone behind me
The contact's wife owns a 1999 Toyota 4Runner. The contact stated that while his daughter was driving at a slow speed, the back end of the vehicle began to wobble. The contact stated that his daughter pulled the vehicle into a parking lot and had the vehicle towed to the contact's home. The vehicle was inspected and severe corrosion was discovered on the driver's side rear lower control arm mount. The dealer was notified of the failure and informed him that there are no recalls on the vehicle. The manufacturer was also notified of the failure and the contact was given the same information as the dealer. The vehicle had yet to be repaired. The failure mileage was approximately 240,000.
Mileage: 240,000
The component that is failing is the frame. The vehicle is available for inspection upon request. The safety of myself and others is at risk due to the frame falling apart due to the lack of integrity. The lack of integrity and strength is from oxidation or major rust. The vehicle has not been inspection by a 3rd party. The rust is a common issue in this year/model from other owners and has appeared to be a manufacturing error.
The component that is failing is the frame. The vehicle is available for inspection upon request. The safety of myself and others is at risk due to the frame falling apart due to the lack of integrity. The lack of integrity and strength is from oxidation or major rust. The vehicle has not been inspection by a 3rd party. The rust is a common issue in this year/model from other owners and has appeared to be a manufacturing error.
Over the years of ownership, my vehicle has been overwhelmed with rust issues. All four axles are rusted to include the brake components. I didn't realize how bad the rusting was until I heard "popping" noise when making turns The rear suspension sway bar link was rusted so bad, it broke free. I had the rack and pinion replaced in August of 2020 because rust ate through the lines. The frame appears to have separations due to rust as well.
Over the years of ownership, my vehicle has been overwhelmed with rust issues. All four axles are rusted to include the brake components. I didn't realize how bad the rusting was until I heard "popping" noise when making turns The rear suspension sway bar link was rusted so bad, it broke free. I had the rack and pinion replaced in August of 2020 because rust ate through the lines. The frame appears to have separations due to rust as well.
Over the years of ownership, my vehicle has been overwhelmed with rust issues. All four axles are rusted to include the brake components. I didn't realize how bad the rusting was until I heard "popping" noise when making turns The rear suspension sway bar link was rusted so bad, it broke free. I had the rack and pinion replaced in August of 2020 because rust ate through the lines. The frame appears to have separations due to rust as well.
RIGHT REAR CHASSIS RUSTED OUT
Mileage: 86,000
DRIVING EASTBOUND INTO PORTLAND (OR) ON HWY.26 (SUNSET HWY.), THREE LANES INBOUND. THREE LANES INBOUND, I WAS IN THE RIGHT LANE.AS WE NEARED THE TUNNELS, TRAFFIC STOPPED BUMPER-TO-BUMPER, AS IT OFTEN DOES. I STOPPED, LEAVING A SMALL BUFFER BETWEEN MY VEHICLE AND THE ONE AHEAD OF ME, AND WATCHED THE RED MAZDA CX-5 APPROACHING BEHIND, NOT SLOWING, AND BRACED FOR THE BUMP. BAM! IT WAS A SERIOUS JOLT. WE PULLED OFF ONTO THE SHOULDER. TRAFFIC WAS BUSY, SO IT TOOK A WHILE TO GET OUT TO INSPECT DAMAGE. I WAS EXPECTING MORE THAN I FOUND, AND ACTUALLY NOTICED NO DAMAGE AT THE TIME. THE MAZDA THAT HAD REAR-ENDED ME SUSTAINED SOME SERIOUS COSMETIC DAMAGE, BUT WAS STILL DRIVEABLE. WE TRADED INFO, AND I HEADED ON TO MT.HOOD TO SKI. A COUPLE OF DAYS LATER, I NOTICED THAT MY DRIVERS SEAT WAS A BIT WOBBLY. WHEN I GOT A CHANCE TO CHECK THE CAUSE,I FOUND THAT THE FRONT LEFT BOLT HOLDING THE SEAT WAS LOOSE.I TIGHTENED IT BACK DOWN.,BUT IT CAME LOOSE AGAIN AFTER THE EMBEDDED NUT CAME LOOSE FROM THE FRAM
Mileage: 218,400
THE FRAME IS RUSTING FROM THE INSIDE OUT
MY FRAME IS RUSTED ALMOST TO PIECES. I KNOW THIS IS A COMMON PROBLEM WITH 4RUNNER OF THE SAME YEAR MODELS. AND I HOPE TO GET A RECALL BECAUSE IT'S PUTTING ME AND OTHERS AT RISK OF WRECKING THE CAR AND POSSIBLE INJURIES.
Mileage: 262,000
TL* THE CONTACT OWNS A 1999 TOYOTA 4RUNNER. THE CONTACT STATED THAT THE DRIVER'S SIDE FRONT SEAT ADJUSTER LEVER WAS FRACTURED. NEITHER THE LOCAL DEALER NOR THE MANUFACTURER WERE CONTACTED OR INFORMED OF THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE FAILURE MILEAGE WAS 100,000.
Mileage: 100,000
MY VEHICLE IS VERY CLEAN AND WELL MAINTAINED AND HAD NO INDICATION OF TROUBLE OR HANDLING ISSUES. A REPAIR SHOP WAS TAKING IT BACK TO FIX AN EXHAUST PROBLEM WHEN HE NEARLY LOST CONTROL. I COULDN'T BELIEVE IT WHEN HE NOTIFIED ME IT WAS UNSAFE TO DRIVE, BUT FOUND OUT THAT ONE SECTION OF THE FRAME HAD TOTALLY RUSTED THROUGH WHERE THE AXLE LINK MOUNTS TO THE FRAME. IT COULD HAVE TORN THE AXLE OUT FROM UNDER THE VEHICLE WITH NO PREVIOUS WARNING. I HAD BEEN DRIVING ON 4 LANE INTERSTATE AT 70 JUST DAYS BEFORE WITH NO HANDLING ISSUES AT ALL. I PERSONALLY HAVE CHANGED THE OIL AND GREASED THE DRIVE TRAIN ALL BUT ONCE OVER THE PAST FIVE YEARS AND NOT NOTICED THIS SMALL AREA OF SEVERE RUST THROUGH. I HAVE ALSO SPENT OVER $3000 ON EXHAUST, TIRES, AND MAINTENANCE REPAIR OVER THE PAST YEAR BECAUSE I THOUGHT IT WAS WORTHY OF 5-10 MORE YEARS AND 100,000 MORE MILES. MY 2001 CAMRY IS DRIVEN BY MY SON NOW AND HAS APPROXIMATELY 390,000 MILES ON IT. I JUST SOLD MY 1994 JEEP CHEROKEE WITH OVER 300,000 MILES
Mileage: 182,600
VEHICLE FRAME IS ROTTED
Mileage: 150,000
VEHICLE FRAME IS ROTTED
Mileage: 150,000
I HEARD RUBBING NOISES FROM MY LEFT FRONT WHEEL.I THOUGHT BRAKES BUT WHEN I INSPECTED THE UNDERSIDE OF MY VEHICLE I NOTICED THAT THE RUBBING WAS COMING FROM A RUSTED AND BROKEN OFF BRAKE SHIELD.I AM OLDER WITH BACK ISSUES SO GETTING UNDER THE CAR FOR A GOOD LOOK M IS TOUGH AT BEST.WHAT I COULD SEE USING A RIGID SEESNAKE BOROSCOPE WAS EXTENSIVE RUST .RUST ALL OVER KEY STRUCTURAL FRAME COMPONENTS FROM MOTOR MOUNTS TO STEERING LINKAGE THE CHASSIS IN SOME AREAS HAS COMPLETELY DISAPPEARED.LOOKING AT THE BODY YOU WOULD THINK THE CAR WAS IN REALLY GOOD SHAPE BUT NOT UNDERNEATH.TOYOTA DIDN'T HAVE 4RUNNERS AS PART OF THEIR RECALL BUT THEY SHOULD HAVE AS THE 4RUNNER USES THE SAME TRUCK CHASSIS AS THE TACOMAS .I NEED THIS TRUCK AND I NEED IT TO BE SAFE.THANKS FOR LISTENING
Mileage: 150,000
I HEARD RUBBING NOISES FROM MY LEFT FRONT WHEEL.I THOUGHT BRAKES BUT WHEN I INSPECTED THE UNDERSIDE OF MY VEHICLE I NOTICED THAT THE RUBBING WAS COMING FROM A RUSTED AND BROKEN OFF BRAKE SHIELD.I AM OLDER WITH BACK ISSUES SO GETTING UNDER THE CAR FOR A GOOD LOOK M IS TOUGH AT BEST.WHAT I COULD SEE USING A RIGID SEESNAKE BOROSCOPE WAS EXTENSIVE RUST .RUST ALL OVER KEY STRUCTURAL FRAME COMPONENTS FROM MOTOR MOUNTS TO STEERING LINKAGE THE CHASSIS IN SOME AREAS HAS COMPLETELY DISAPPEARED.LOOKING AT THE BODY YOU WOULD THINK THE CAR WAS IN REALLY GOOD SHAPE BUT NOT UNDERNEATH.TOYOTA DIDN'T HAVE 4RUNNERS AS PART OF THEIR RECALL BUT THEY SHOULD HAVE AS THE 4RUNNER USES THE SAME TRUCK CHASSIS AS THE TACOMAS .I NEED THIS TRUCK AND I NEED IT TO BE SAFE.THANKS FOR LISTENING
Mileage: 150,000
I HEARD RUBBING NOISES FROM MY LEFT FRONT WHEEL.I THOUGHT BRAKES BUT WHEN I INSPECTED THE UNDERSIDE OF MY VEHICLE I NOTICED THAT THE RUBBING WAS COMING FROM A RUSTED AND BROKEN OFF BRAKE SHIELD.I AM OLDER WITH BACK ISSUES SO GETTING UNDER THE CAR FOR A GOOD LOOK M IS TOUGH AT BEST.WHAT I COULD SEE USING A RIGID SEESNAKE BOROSCOPE WAS EXTENSIVE RUST .RUST ALL OVER KEY STRUCTURAL FRAME COMPONENTS FROM MOTOR MOUNTS TO STEERING LINKAGE THE CHASSIS IN SOME AREAS HAS COMPLETELY DISAPPEARED.LOOKING AT THE BODY YOU WOULD THINK THE CAR WAS IN REALLY GOOD SHAPE BUT NOT UNDERNEATH.TOYOTA DIDN'T HAVE 4RUNNERS AS PART OF THEIR RECALL BUT THEY SHOULD HAVE AS THE 4RUNNER USES THE SAME TRUCK CHASSIS AS THE TACOMAS .I NEED THIS TRUCK AND I NEED IT TO BE SAFE.THANKS FOR LISTENING
Mileage: 150,000
THE VEHICLE READS EMPTY WHEN FULL AND FULL WHEN EMPTY SOMETIMES. CONSTANTLY CHANGING NEVER ABLE TO KNOW IF THE TANK IS FULL AND RAN OUT OF GAS SINCE IT WASN'T READING THE CORRECT AMOUNT CAR WAS NOT IN MOTION WHEN I RAN OUT FORTUNATELY. *TR
Mileage: 199,252
VALVE COVER GASKET FAILED HEAD GASKET FAILED, 3RD CYL AFFECTED. *TR
Mileage: 350,000
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology - how this data is sourced, computed, and verified.