2019 Toyota Tundra: Electrical System complaints
Owner-reported issue (NHTSA complaints, not a recall)
Symptoms
NHTSA has 13 owner complaints for the 2019 Toyota Tundra that list the electrical system component. Complaints are individual owner reports, not verified defects.
Examples:
- NHTSA complaint ODI #11731104 (filed 04/14/2026): “The contact owns a 2019 toyota tundra. the contact stated that while parked for 5-10 minutes, the contact noticed a burning plastic odor, and upon looking up moments later, the contact noticed flames coming from the driver's side headlight, and the flames were 6 inches above the headlight. the conta…”
- NHTSA complaint ODI #11681433 (filed 08/18/2025): “Intermittent message displaying "trailer brakes disconnected" while towing. trailer lights continued to operate even while message was displayed. on average trailer connected and disconnected every 2-3 minutes…”
- NHTSA complaint ODI #11676036 (filed 07/24/2025): “Keep getting the messages "trailer brake error, if towing come to a stop with manual controls" and "pre-collision system malfunction" the messages go away usually after restarting the vehicle but eventually comes back on…”
Likely causes
These complaints do not establish a single root cause; read the examples above and get a diagnosis.
Fix, in plain English
No single fix is established by these reports. Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer about technical service bulletins (TSBs) or extended warranty coverage, then have the system diagnosed.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
No sourced cost range for this issue. Get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
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Sources
Page last updated .