1990 Toyota 4RUNNER Problems

What owners report

Owners of this model year most often describe engine problems, particularly head gasket failures on the 3VZ-E V6, reported as white smoke, coolant loss and overheating, sometimes repeatedly and occasionally followed by lower-end engine damage. A separate cluster covers the automatic transmission shifting in and out of overdrive at highway speed, and a few reports describe a cracked clutch or brake pedal bracket and corroded brake lines.

1. 1
   Engine cooling

   Head gasket failure (white smoke, coolant loss)

   • 22 complaints (28%)
   • median 91,012 mi at 13.3 yrs old (3 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 1996–2006

   Owners describe white smoke from the exhaust, coolant disappearing or spewing, rough running and overheating, with a technician or dealer confirming a blown head gasket. Several report the repair being done once under an extended warranty or special campaign and the gasket failing again later, sometimes with oil fouling plugs or lower engine damage that followed. Some owners say the dealer or manufacturer declined further coverage, citing the terms or timeframe of the original program. Reported across a wide mileage range, from under 50,000 to over 100,000 miles; several complaints mention failure shortly after a prior gasket repair.

   2 related service bulletins

   What to check: Ask whether the head gasket has been replaced under the 3VZ-E program and keep the paperwork; check for white smoke on start-up, coolant loss, oil that looks milky, and any coolant smell from the exhaust.

   2 excerpts from owner complaints in NHTSA records

   “My Toyota 4-runner blew a head gasket 10 months after purchase. I contacted both reno Toyota and carson Toyota. Niether dealer were helpfull in recall information. After replacing the motor, my mechanic assured me that it was a common accurance in the 4-runner to have faulty head gaskets. I then contacted carson Toyota and they told me that they would fix the problem but not pay for anyone else to do so. By the time they contacted me the work was complete and a bill of over $6500 was incured. …”

   NHTSA complaint #739281, filed 2001-01

   “While the vehicle was parked, the consumer noticed fluid leaking from underneath the vehicle. The consumer took the vehicle to the dealer for an inspection. The mechanic informed the consumer that the head gasket was cracked and needed to be replaced. Please provide further details.”

   NHTSA complaint #10096606, filed 2004-10
2. 2
   Body and structure

   Cracked clutch/brake pedal bracket

   • 6 complaints (8%)
   • median 213,012 mi at 22.0 yrs old (3 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 1997–2018

   Owners describe a loud snap at the pedal, after which the clutch pedal no longer disengages the clutch or the brake pedal cannot be pressed, leaving the vehicle stuck in gear or without brakes. In several cases the bracket holding the pedal assembly, or the body area it mounts to, was found cracked or fractured, and one owner reports the part being repaired more than once. Reported from roughly 130,000 to 215,000 miles in the sample, often with no warning beforehand.

   What to check: Inspect the pedal bracket and firewall area in the driver footwell for cracks or prior welding, and press the clutch and brake firmly while watching for movement or flexing.

   2 excerpts from owner complaints in NHTSA records

   “Clutch pedal bracket failure no events were present leading up to the failure of my clutch pedal bracket assembly. While approaching a stoplight in traffic I depressed my clutch pedal in order to gear down for the stop. While depressing the pedal I heard a loud snap - the sound of the clutch pedal bracket breaking. With the bracket broken there was no acceptable way to disengage the clutch and get the vehicle out of gear to stop for the stop light. …”

   NHTSA complaint #10143378, filed 2005-11, 213,012 miles

   “Clutch/brake pedal bracket broke/cracked after pressing the clutch pedal. Was originally diagnosed as a bad clutch and almost pulled the plug to get the clutch replaced. Would have been a load of wasted money on a poor diagnosis. Pedal bracket cracked with clutch pedal was pressed to start the car. Heard lour crack, car started, but would not go into gear.”

   NHTSA complaint #11090284, filed 2018-04, 215,000 miles
3. 3
   Transmission and drivetrain

   Overdrive cycling on and off at highway speed

   • 5 complaints (6%)
   • median 110,000 mi at 13.3 yrs old (1 states mileage, few)
   • filed 1997–2003

   Complaints describe the automatic transmission repeatedly dropping in and out of overdrive, roughly every second, while cruising at highway speeds, with engine rpm rising and fuel economy dropping. One owner reports the dealer said the transmission would need replacement, and another notes a wiring harness repair that helped for a while before the behavior returned. Described during highway-speed cruising; odometer readings in the sample range from about 110,000 to 150,000 miles.

   3 related service bulletins

   What to check: Drive the vehicle at steady highway speed and watch for the tachometer surging or the transmission hunting between gears; ask whether any transmission or wiring work has been done.

   An excerpt from owner complaints in NHTSA records

   “1990 Toyota 4-runner intermittantly jumps in and out of overdrive at approximately 55 miles per hour or higher when highway driving, causing increase in gas mileage and high rpms on the engine. In 2001 I went to Toyota for this problem and they told me I would need to replace the transmission so I should drive the vehicle until I could not drive it anymore. At that point I should have the transmission replaced. After extensive research I located tsbs for this vehicle and found one that addresses this issue (TSB atratb351 dated jan 96). …”

   NHTSA complaint #10000871, filed 2003-01, 110,000 miles
4. 4
   Brakes

   Rusted brake lines and brake fluid loss

   Mentioned in 4 of 52 sampled complaints

   Complaints describe sudden loss of braking when a metal brake line fails, in one case where a line had worn against the anti-lock brake control arm and in another where several lines broke during normal driving at low speed. Owners report the lines being replaced afterwards, and one also mentions ABS engagement causing the vehicle to slide. Reported on older, higher-mileage vehicles, including one at about 212,000 miles; conditions described are ordinary driving, not hard use.

   2 related service bulletins

   What to check: Have the metal brake lines inspected along their full length, especially near the ABS components and rear axle, and check the fluid reservoir and pedal feel.

   2 excerpts from owner complaints in NHTSA records

   “Total loss of braking function. Wife and grand daughter in car. No accident occurred. Emnergency brake still functioned. Root cause was due to long-term wear on left rear metal brake line by anit-lock-brakes control arm. This action resulted in the metal brake line integrity failure.”

   NHTSA complaint #10043743, filed 2003-10, 212,000 miles

   “While driving the vehicle about 20 MPH and appyling brake pressure 2 out of 3 brake lines broke, causing no braking ability. Driver was able to avoid a crash. The brake lines have been replaced by dealership.”

   NHTSA complaint #821094, filed 1998-02
5. 5
   Engine cooling

   Engine fires and stalling (fuel smell, smoke)

   • 5 complaints (6%)
   • median 100,500 mi at 17.5 yrs old (2 state mileage, few)
   • 4 mention a crash, fire or injury
   • filed 1997–2016

   A few complaints describe an engine-compartment fire or a sudden loss of power with a fuel smell, in some cases after earlier engine work such as a short block or head gasket replacement. Owners report the vehicle being towed to a dealer for inspection, and in one case the cause of the fire was not identified. Reported on vehicles with no consistent mileage pattern in the sample; several occurred during normal driving or at start-up.

   1 related service bulletin

   What to check: Look for fuel or burning smells around the engine bay, check for prior engine replacement or major engine work in the service records, and have the fuel lines and injector area inspected.

   2 excerpts from owner complaints in NHTSA records

   “This specific Toyota forerunner model had a recall for gasket failure. We had it replaced at appx 74,000 miles done by Toyota as a courtesy recall. This truck currently has very low mileage considering the age of the truck, about 148,000 miles. It recently almost caught fire overheating after another gasket failure. We feel that either the original repair was not properly completed or another faulty gasket was installed. It's amazing that both times the gasket failed at around the same mileage, 75,000. …”

   NHTSA complaint #10855190, filed 2016-04, 148,000 miles

   “The consumer was driving truck, and she noticed that there was no pressure when she hit the gas pedal and she smelled fuel. Also she had a new engine put in july, the mileage was 75000 on the truck. The short block was replaced . Then the truck burst into flames. The car wa stowed to the dealer for further investigation.”

   NHTSA complaint #832190, filed 1998-12

Buying note. These are old, high-mileage vehicles, so condition and history matter more than the model itself; confirm whether the 3VZ-E head gasket work was done and documented, and have a shop inspect the brake lines and pedal bracket before purchase.

Summary written with AI from a sample of 52 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.