2020–2021 Thomas Built Buses Saf-T-Liner C2 Recall: Switch Hub Module (SHM) that controls the exterior warning lights and stop…
NHTSA campaign 20V113000 · Other · filed Feb 26, 2020 · verified Jul 30, 2026
The defect
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2020 Thomas Built Buses Saf-T-Liner C2 school buses configured with a specific Switch Hub Module (part numbers 204803 and 216434) combined with a 500k Bulk Head Module and a certain 3-position momentary switch warning light package. The Switch Hub Module (SHM) that controls the exterior warning lights and stop sign may fail, resulting in deactivation of the red warning lights, stop sign and system indicator.
The risk
If the exterior warning lights and stop sign indicator stop working, other drivers may inadvertently proceed driving before the school bus loading/unloading of students is complete, increasing the risk of an injury.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
DTNA will notify owners, and dealers will update the SHM, free of charge. The recall began April 15, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-844.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Thomas Built Buses | Saf-T-Liner C2 | 2020, 2021 |
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All Thomas Built Buses Saf-T-Liner C2 recalls → · All Thomas Built Buses recalls →
Source: NHTSA recall database, campaign 20V113000 (manufacturer number FL-844). Data last verified Jul 30, 2026.