2003 Lexus SC430 Electrical system Problems
- Complaints
- 1about this part
- Share
- 5%of 20 total for the year
- Median mileage
- 167,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the electrical system of the 2003 Lexus SC430, 5% of the 20 complaints for this model year. Where a mileage was given, the median is 167,000 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.
“The contact owns a 2003 Lexus SC430. While driving 40 MPH, all the instrument panel indicators illuminated and then shut off, and the transmission downshifted. The transmission failure caused the vehicle to jerk when the gears were shifted. In addition, the contact stated that the convertible top of the vehicle would not close and that the none of the windows would close. An independent mechanic stated that the battery was not the cause of the failure, but the failure was not determined. The dealer and manufacturer were not contacted. The failure mileage was 167,000.”
NHTSA complaint #11013787, filed 2017-08, 167,000 milesRelated service bulletins
- 10131726Jan 22, 2018TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. L-SB-0021-14. * Applicability has been updated to include applicable 2018…
- 10140576May 6, 2016TT: Some customers may experience difficulty programming HomeLink.
- 10093004May 6, 2016Tt: some customers may experience difficulty programming homelink.
- 10111398Apr 10, 2015LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many…
- 10111205Apr 10, 2015LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many…
- 10109449Oct 23, 2014TSB: 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…
- 10205331Jul 7, 2014Immobilizer and Smart Key Reset
- 10205330Jul 7, 2014Immobilizer and Smart Key Reset
- 10205329Jul 4, 2014Immobilizer and Smart Key Reset.
- 10205327Jun 12, 2014Techstream ECU Flash Reprogramming Procedure.
Electrical system: other model years
Other parts of the 2003 Lexus SC430
10 complaintsBrakes
4 complaintsTires
3 complaintsSteering
2 complaintsSuspension
2 complaintsElectronic stability control
1 complaintsEngine cooling
1 complaintsOther or unknown
1 complaintsBody and structure
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaintsWheels
1 complaints
← All problems reported for the 2003 Lexus SC430
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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