Owners of 2019 Tundras are reporting a wide cluster of electrical and safety-system failures. The most concerning: a pre-collision sensor triggers false brake warnings and automatic braking with no hazard present, sometimes within the first 3,000 miles. Several owners describe complete electrical shutdown—taillights, airbags, windows, headlights, braking system all failing at once while driving. One owner's truck caught fire at the headlight while parked; another reports a seat heater module burning and nearly catching fire.
Trailer brake system messages appear randomly even when no trailer is attached, and when owners actually tow, the trailer brakes disconnect intermittently, forcing the truck's brakes to handle the full load. One owner with his 3-year-old in the truck couldn't stop in safe distance. Multiple owners report cascading warning lights—the "Christmas tree" effect—with messages like pre-collision malfunction, drive start control malfunction, and blind spot monitor errors popping up together, sometimes clearing after restart but returning later.
Engine shutdown with loss of power steering and brakes occurred at cruise control speed, leaving one driver stranded in oncoming traffic. Front turn signals are inadequately visible to other drivers when headlights are on. Toyota's responses so far: foamy tape patches, warranty denials, and refusal to issue recalls despite acknowledged fire hazards.
Failure modes owners describe
Pre-collision system sensor malfunction
Sensor on the anti-collision avoidance system triggers false brake warnings and chimes while driving at normal highway speeds. Early owner reports on 2019 Tundras suggest water or moisture intrusion causing intermittent activation.
When: As early as 3,000 miles; also reported at 100,500 miles
Symptoms owners cite: False "BRAKE!" warning message and chime on dashboard; Brake warning appears multiple times during single drive; Pre-collision warning system unavailable message; Automatic emergency braking when no hazard exists
Repairs/costs cited: Toyota applies foamy tape to back of sensor and runs diagnostic; some owners report this feels inadequate
Recalls/TSBs owners mention: Recall identified by dealer service for sensor on anti-collision avoidance system (Campaign 21V688000 mentioned for related electrical/lighting issues)
Headlight assembly fire
Driver-side headlight assembly caught fire while vehicle parked, flames extending 6 inches above headlight. Owner extinguished with water and sustained minor smoke inhalation. Manufacturer sent field inspector but no repair completed at time of report.
When: Approximately 100,500 miles
Symptoms owners cite: Burning plastic odor while parked; Flames visible from driver-side headlight assembly
Repairs/costs cited: Not repaired; vehicle not diagnosed at time of complaint
Recalls/TSBs owners mention: Field inspector sent; manufacturer said inspection report would be completed same day with 45-60 day follow-up (Campaign 21V688000)
Complete electrical system failure
All electrical systems failed simultaneously while driving: taillights died first, then airbags, windows, headlights, pre-collision system, lane departure, and braking system. Dealer confirmed electrical short of some kind. Multiple safety-critical systems lost power at once.
When: March 24, 2023
Symptoms owners cite: All dashboard warning lamps illuminated one at a time, seconds apart; Complete electrical shutdown while driving; Loss of taillights; Loss of airbags, windows, headlights; Loss of pre-collision warning and lane departure systems; Braking system failure
Repairs/costs cited: Roseville Toyota dealer confirmed electrical short
Engine shutdown and power loss while driving
Engine light illuminated, then engine shut down completely with loss of power steering and brakes while operating cruise control at 30 mph. Steering wheel became hard to turn, forcing driver into oncoming traffic lane. Transmission locked; shift lock release required to load vehicle onto flatbed.
Symptoms owners cite: Engine light activation; Complete engine shutdown at cruise control speed; Loss of power steering; Loss of brakes; Hard steering wheel; Transmission lock
Repairs/costs cited: Shift lock release required by tow truck driver to load vehicle
Trailer brake system disconnection errors
Intermittent "Trailer Disconnect" or "Trailer Brake Error" messages appear on dashboard even when no trailer is attached or connected. When towing, trailer braking system fails to engage, forcing truck brakes to handle full trailer weight, resulting in unsafe stopping distances. Messages clear temporarily after restart but return.
When: While towing
Symptoms owners cite: "Trailer Disconnect" or "Trailer Brake Error" warning messages; "Pre-collision System Malfunction" message appearing simultaneously; Trailer braking system fails to engage when towing; Trailer brake disconnect/reconnect every 2–3 minutes while towing; Unsafe braking distances when trailer brakes unavailable; Messages appear with no trailer attached
Repairs/costs cited: Owner reports fix available but Toyota denies coverage as warranty issue
Recalls/TSBs owners mention: Toyota refused to issue safety recall; warranty denial
Radar cruise control sensor malfunction
Adaptive cruise control displays "Radar Cruise Control Unavailable Clean Sensor" message in clear weather with no moisture. Message persists despite clean sensor, disabling cruise control and pre-collision warning. Randomly triggers false "BRAKE!" message causing automatic hard braking with no emergency present.
Symptoms owners cite: "Radar Cruise Control Unavailable Clean Sensor" message in clear conditions; Adaptive cruise control non-functional; Pre-collision warning system disabled; Spontaneous "BRAKE!" message; Automatic hard braking with no hazard
Multiple warning light cascades (electrical malfunction)
Multiple independent electrical and safety system warning messages illuminate together or in rapid succession: pre-collision system malfunction, drive start control malfunction, blind spot monitor malfunction, rear cross-traffic alert, trailer brake error, ABS, traction control, and lane departure warnings. Described as "Christmas tree" of warnings. Messages often clear after restart but return.
Symptoms owners cite: "Pre-collision System Malfunction" warning; "Drive Start Control Malfunction" warning; "Blind Spot Monitor Malfunction" warning; "Rear Cross-Traffic Alert" warning; "Trailer Brake Error" warning; ABS, traction control, brake system warnings; Lane departure warnings; Warnings clear temporarily after restart
Front turn signal visibility issue
Front amber turn signal lights flash but are not adequately visible to other drivers when daytime running lights or headlights are on. Drivers frequently fail to see turn signal indication from front of vehicle.
Symptoms owners cite: Front amber turn signal lights not visible with DRL or headlights on; Other drivers cannot see turn signal from front
Seat heater control module fire hazard
Seat heater control module plastic burns and melts, nearly starting fire. Owner reports Toyota knows of issue but refuses to issue safety recall.
Symptoms owners cite: Plastic burning in seat heater control module; Plastic melting; Near-fire condition
Recalls/TSBs owners mention: Toyota refuses to issue safety recall despite known issue
Synthesized from 12 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.