2015 Toyota Tundra Problems

What owners report

Owners of the 2015 Tundra most often describe engines that stall, shut off, or are hard to start, with some tied to flex-fuel or fuel system repairs that did not resolve the problem. Other common reports include a trailer brake controller that gives weak braking, brake vibration, lights that cut out, and airbag warning or horn faults. Mileage in these complaints varies widely, from under 1,000 miles to over 380,000 miles.

1. 1
   Fuel system

   Engine stalling, no-start, and hard starting

   • 7 complaints (14%)
   • median 95,000 mi at 6.0 yrs old (3 state mileage, few)
   • filed 2018–2026

   Owners describe the engine shutting off while driving or idling, restarting only after a wait, or cranking without starting. Some report hard cold starts and a flex-fuel system that appears to misread the fuel's alcohol content, and a complaint mentions a fuel smell. According to complaints, dealers reflashed the engine software and replaced fuel system parts, including a fuel pump, but the symptoms continued. Where mileage is given, complaints range from about 50,000 to 124,000 miles, and some describe the hard starting in cold weather.

   What to check: Ask for repair orders covering starting, stalling, flex-fuel software, and fuel pump work. On a test drive, check whether the engine restarts normally after a short idle and from a cold start.

   2 excerpts from owner complaints in NHTSA records

   “Truck shuts down after running for about 2 minutes; As if the ignition switch was turned off while driving. I then have to wait about 30 seconds to restart the truck. The truck will not start immediately after shutting off. It acts like something has to reset to allow the truck to start. The truck will do the same thing idling in my driveway. It starts right up; Runs about 2 minutes and shuts off. After 30 seconds the truck will restart. This is a danger on the highway. I do not have remote start.”

   NHTSA complaint #11424794, filed 2021-07

   “With the many times I have severely tried to start my vehicle it has a hard start not due to other components such as the battery or other electrical issues but the flex fuel integration in the system not reading correctly. With the reflash done many times it will still not resolve the issue. With the vehicle always at a cold start weather it would be a hot day or a cold day it always seems to have the hard start issue. This issue has many affects on drivers safety and could cause severity on the engine with faults soon to happen. …”

   NHTSA complaint #11078258, filed 2018-03
2. 2
   Brakes

   Integrated trailer brake controller gives weak braking

   Mentioned in 4 of 45 sampled complaints

   Owners describe the integrated trailer brake controller not supplying enough power to the trailer brakes early enough, so the trailer pushes the truck when stopping. Some say the trailer brakes barely engage even at the highest gain setting, and that a manual lever is the only way to lock them. Others switched to an aftermarket controller while they wait for a fix from the manufacturer. Where mileage is given, complaints range from about 7,500 to 250,000 miles, and the symptom is described while towing a trailer or camper.

   What to check: Ask a dealer to demonstrate the integrated trailer brake controller with a loaded trailer or camper, and whether any software fix is available. If towing is planned, ask whether an aftermarket controller may be needed.

   2 excerpts from owner complaints in NHTSA records

   “I own a 2015 Tundra crew cab. The family and I love to camp, so we purchased a brand new camper. I hooked up the camper to the Tundra utilizing the 7 pin connector. The dash display indicated the integrated brake control was working and fully functional. To my dismay, the brake control did not work to satisfaction and border lined a safety issue. With the gain turned up to 10 on electric mode, the camper's brakes barely engaged and rarely slowed down my truck. The camper is 7800 pounds. …”

   NHTSA complaint #10872503, filed 2016-06, 7,500 miles

   “My intergrated trailer brake controller( part # 89547-0c010) is not functioning properly. It provides braking to my trailer only by using the manual slide. When braking, I feel no braking the trailer.”

   NHTSA complaint #10869996, filed 2016-05, 250,000 miles
3. 3
   Exterior lighting

   Lights cutting out, or dash lights not working

   • 5 complaints (10%)
   • median 52,350 mi at 4.1 yrs old (2 state mileage, few)
   • filed 2017–2023

   Owners describe headlights and tail lights shutting off for a few seconds, sometimes along with dash, cabin, and radio lights, including when the turn signal is used. Some say the lights cut out at irregular intervals, on smooth roads and while stopped, as well as in motion. Another complaint describes the instrument and gauge lights not working in daytime with automatic lights, and says the dealer advised driving with the parking lights on so the dash would be lit. Mileage is stated only for the dash light complaint, at about 57,000 miles, and some describe the lights cutting out both in motion and at a stop.

   What to check: During a test drive, use the turn signal and headlights, and watch whether the headlights, dash lights, and cabin lights stay on. Ask for repair records for lighting or electrical work, including any dealer note on the dash light problem.

   2 excerpts from owner complaints in NHTSA records

   “At irregular intervals and at the most random of times my headlights will cut out (including dash lights & radio). It happened this morning driving to the airport but it has been months since it last happened. The road was smooth with no bumps that I recall. This has happened to me in the past while stopped at a stop sign as well.”

   NHTSA complaint #11500737, filed 2023-01

   “The dash instrument and gauge lights do not work during daytime when lights are set to automatic. Basic instruments are not clear and require that the driver be distracted much longer than is acceptable to try to read the dark instrument cluster. This condition is present in all driving conditions whether stationary or in motion. The local Toyota dealership instructed me to drive with the parking lights on so the dash would be lit. The dealership said this problem is present on all newer Toyota tundras. …”

   NHTSA complaint #11302654, filed 2020-01, 57,000 miles
4. 4
   Air bags

   Airbag warning light, non-deployment, and horn failure

   Mentioned in 4 of 45 sampled complaints

   Owners describe the airbag warning light coming on, with the horn stopping, or the horn working only when the key fob is used. Some crash-related complaints say the airbags did not deploy, including a case where only the front passenger airbag stayed inactive. According to complaints, a dealer diagnosed a faulty clock spring that affected the horn and airbags, and the vehicle was left unrepaired. Where mileage is given, these complaints range from about 6,000 to 154,000 miles.

   What to check: Ask whether the airbag warning light was scanned and whether the clock spring and horn circuit were checked. Confirm during a pre-purchase inspection that the horn sounds from the steering wheel pad and that the airbag warning light is off.

   2 excerpts from owner complaints in NHTSA records

   “Was living in South Carolina at the time, but now live in West Virginia. Airbag light came on and Horn stopped working. Has not worked since and received a recall in the mail, but they are saying my vehicle is not on the list. Has not been repaired, but still in-operative.”

   NHTSA complaint #11732643, filed 2026-04

   “2015 Toyota Tundra. Consumer writes in regards to vehicle brake failure. The consumer stated as he was approaching a red light, he attempted so slow down. Consequently, he rear ended the vehicle in front of him. The consumer also stated the air bag did not deploy.”

   NHTSA complaint #10806931, filed 2015-11
5. 5
   Brakes

   Brake vibration, warped rotors, and soft pedal

   • 5 complaints (10%)
   • median 18,196 mi at 1.8 yrs old (2 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2015–2025

   Owners describe vibration felt through the steering wheel, brake pedal, or front end when braking at highway speeds or from about 40 mph, and some link it to rotors that warped or overheated. Some describe a soft pedal that goes nearly to the floor before the brakes engage, and a parking brake that heated up and stuck, causing a wobble. According to complaints, dealers flushed the brakes, replaced the master cylinder and parking brake shoes, and machined rotors, but some owners say the symptoms continued, and a dealer described the vibration as normal. Where mileage is given, symptoms were reported between under 5,000 and about 25,500 miles, and a rotor warping report describes them within about 3 months.

   3 related service bulletins

   What to check: Ask whether any brake vibration service bulletins were applied, including the bulletin on lug nut torque. On a test drive, note whether the steering wheel or brake pedal vibrates when braking from highway speed.

   2 excerpts from owner complaints in NHTSA records

   “Parking brake began to fail at holding my Tundra stationary in my driveway (which is approximately a 16% grade) at 10,892 miles. First service complaint Toyota found the parking brake to be operational but adjusted it. On my way home, this adjustment caused the left parking brake shoe to heat up and stick causing a 'death wobble'. Vehicle towed to dealer. Toyota of nwa was able to replicate the failure during a test drive to a road of equal grade as my driveway. Parking brake shoes were replaced and inside of rotors machined. …”

   NHTSA complaint #10850050, filed 2016-03, 10,892 miles

   “Toyota Tundra 2015 brake rotors overheated and distorted under normal driving conditions on flat city freeways at 60mph and higher. This resulted in significant vibration of the brake pedal and the steering wheel when applying the brakes. I am 74 yrs old and have experience driving all sorts and brands of pick-up trucks and SUV's and have never every experienced this. The Toyota dealership is claiming this is normal.”

   NHTSA complaint #10959088, filed 2017-03, 25,500 miles

Buying note. Prospective buyers who plan to tow should ask about the trailer brake controller and test it with a trailer if possible. A pre-purchase inspection that includes a cold-start check, a road test with braking, and a check of the lights, horn, and airbag warning light can help clarify the truck's condition.

Summary written with AI from a sample of 45 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.