2003 Toyota Tundra Electrical system Problems
- Complaints
- 6about this part
- Share
- 2%of 399 total for the year
- Median mileage
- 51,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the electrical system of the 2003 Toyota Tundra, 2% of the 399 complaints for this model year. Where a mileage was given, the median is 51,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Battery drains with all electrical components shut off. If vehicle left sitting much over one week it will completely drain the battery to the point that it will no longer hold a charge. I've replaced the battery 5 times in one year and finally put a quick disconnect on the negative battery post. I've had Toyota look at it twice and they say there is nothing wrong.”
NHTSA complaint #10361724, filed 2010-10, 73,000 miles“Spiral cable, also called clockspring, failed, identical to other Toyota spiral cable failures on other models that were recalled. Another recall needs to be issued that corrects this dangerous problem (it disables the driver airbag and horn) for affected Tundra models.”
NHTSA complaint #11033062, filed 2017-10, 141,000 miles“Battery drains with all electrical components shut off if vehicle left sitting much over one week. After third visit to dealer, they replaced a wiring harness. The problem persists.”
NHTSA complaint #10200087, filed 2007-08, 17,000 miles“2003 Toyota Tundra. Consumer states problem with vehicle air bags the consumer stated in september, the air bag light started blinking. He took the vehicle to the dealer, where they supposedly fixed the problem at a cost of $ 177.12. However, that same evening, the light started blinking again. He took the vehicle back to the dealer the next morning. The dealer stated the problem was with the wiring harness and the cost to repair it, would be anywhere from $ 2,506.00- $ 3,177.76 plus $ 975 for labor.”
NHTSA complaint #10481702, filed 2012-10Related service bulletins
- 10164330Jul 1, 2019TSB: REVISION NOTICE July 01, 2019 Rev2: ? Applicability has been updated to 2019 ? 2020 model year Toyota vehicles. ? The Techstream Preparation and Process Overview sections…
- 10133654Nov 22, 2017TSB: REVISION NOTICE November 22, 2017 Rev1: ? Applicability has been updated to include 2014 ? 2018 model year vehicles. Any previous printed versions of this bulletin should be…
- 10152205Jan 6, 2017TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes SB No. T-SB-0101-11. Applicability has been updated to include 2016 ? 2017 model year vehicles…
- 10132930Nov 29, 2016TSB: OBSOLETE NOTICE: September 14, 2016: This bulletin is now obsolete. Please see T-SB-0134-16.
- 10150418Sep 14, 2016TSB: Supersession Notice. Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are…
- 10134223Sep 15, 2015TT: The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been interrupted.
- 10096556Sep 15, 2015Tt: the vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the engine ecm has been interrupted.
- 10132529Aug 24, 2015TechTip: Condition - The vehicle may be difficult to start or have an abnormally low or rough idle after the battery has been disconnected or power to the Engine ECM has been…
- 10134128Jan 15, 2015TSB: Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix…
- 10096036Jan 15, 2015"tsb: flash reprogramming allows the ecu software to be updated without replacing the ecu. Flash calibration updates for specific vehicle models/ecus are released as field-fix…
Electrical system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2026 | 1 | 3% |
| 2025 | 13 | 9% |
| 2024 | 37 | 11% |
| 2023 | 41 | 10% |
| 2022 | 29 | 7% |
| 2021 | 4 | 17% |
| 2020 | 4 | 9% |
| 2019 | 13 | 18% |
| 2018 | 26 | 26% |
| 2017 | 27 | 35% |
| 2016 | 26 | 22% |
| 2015 | 8 | 16% |
| 2014 | 19 | 20% |
| 2013 | 11 | 13% |
| 2012 | 19 | 12% |
| 2011 | 21 | 16% |
| 2010 | 16 | 10% |
| 2009 | 4 | 11% |
| 2008 | 38 | 12% |
| 2007 | 24 | 6% |
| 2006 | 16 | 3% |
| 2005 | 17 | 5% |
| 2004 | 13 | 3% |
| 2003 | 6 | 2% |
| 2002 | 9 | 2% |
| 2001 | 3 | 1% |
| 2000 | 11 | 1% |
Other parts of the 2003 Toyota Tundra
150 complaintsAir bags
86 complaintsSuspension
63 complaintsBrakes
41 complaintsTransmission and drivetrain
35 complaintsOther or unknown
33 complaintsFuel system
23 complaintsSteering
22 complaintsVehicle speed control
12 complaintsEngine cooling
8 complaintsSeat belts
8 complaintsTires
8 complaints
← All problems reported for the 2003 Toyota Tundra
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology