Recall 24V511 affects 37 2023-2025 Fccc S2C and S2RV vehicles for brake-light failure during active brake assist. Free software update once available.
Fccc is recalling 37 2023-2025 S2C and S2RV vehicles because the brake lights do not illuminate when automatic braking applies the brakes during an active brake assist event. That leaves following drivers without a clear slowing signal, raising crash risk; the Fccc dealer repair will be free once the remedy is available.
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What's wrong?
The issue is in the brake lamp control logic on 2023-2025 Fccc S2C and S2RV vehicles. The expansion module controller is the software-controlled module that tells the brake lights when to turn on. During normal braking, the lamps tell traffic behind the vehicle that the service brakes are being applied.
On affected vehicles, the software parameter watches the signal from the driver's brake pedal but does not include Active Brake Assist events in the brake lamp output logic. Active Brake Assist can apply the service brakes automatically when the system detects a forward-collision risk. In that specific event, the vehicle slows or brakes, but the brake lights do not illuminate for drivers behind it.
There is no warning sign before failure. From the driver's seat, the system still applies the brakes, so the owner is unlikely to notice that the rear brake lamps stayed dark during the automatic braking event.
Who's affected?
Both S2C and S2RV vehicles use the same XCM Parameter part tied to the brake-light and automatic-emergency-braking issues.
| 2023 Fccc S2C | Brake lights |
|---|---|
| 2023 Fccc S2C | Automatic emergency braking |
| 2024 Fccc S2C | Brake lights |
| 2024 Fccc S2C | Automatic emergency braking |
| 2024 Fccc S2RV | Brake lights |
| 2024 Fccc S2RV | Automatic emergency braking |
| 2025 Fccc S2RV | Brake lights |
| 2025 Fccc S2RV | Automatic emergency braking |
| Units affected | 37 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific vehicle.
What's the safety risk?
When brake lights fail to illuminate, drivers behind you are not warned that the vehicle is slowing, which increases crash risk. There is no warning sign before failure, so use extra caution and ask the dealer about current repair timing. Repair will be free at any franchised Fccc dealer once available.
What should I do?
- Check your VIN to confirm your 2023-2025 Fccc S2C or S2RV is included in this recall.
- Wait for Fccc or Daimler Trucks to confirm the repair is open before scheduling the free ABA software update that fixes brake-light operation during active brake assist.
- Call Fccc customer service at 800-745-8000 with questions and reference recall number 24V511 when you call.
- Bring the owner letter if you received one, and ask a franchised Fccc dealer what timing applies to your VIN.
- Drive with extra following distance until the software update is complete, since the brake lights can fail to illuminate during an ABA braking event.
What happens at the repair
Once the final repair is available, an Fccc technician will update the active brake assist software so the brake lights operate correctly during an active brake assist event. The software update and labor are free under the recall. Owner letters were mailed with reimbursement details, and the source directs owners to seek reimbursement through authorized dealers. If you already paid for a related repair, ask the authorized dealer what prior repair paperwork is required for the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| July 3, 2024 | NHTSA published the recall |
|---|---|
| July 23, 2024 | Dealer notification began |
| July 23, 2024 | Dealer notification ended |
| August 29, 2024 | Owner notification mailed |
| September 1, 2024 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| September 1, 2024 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 24V511?
Recall 24V511 covers 37 2023-2025 Fccc S2C and S2RV vehicles with brake lights that fail to illuminate during an active brake assist event. That leaves following drivers without a clear slowing signal, increasing crash risk. Dealers will update the ABA software for free.
What should I do if my 2023-2025 Fccc S2C or S2RV is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 24V511. If it is, contact a franchised Fccc dealer to schedule the ABA software update. Reference recall number 24V511 or DTNA recall F1006 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and DTNA says dealers will update the ABA software free of charge. Parts and labor are covered at a franchised Fccc dealer for vehicles included in recall 24V511.
What is the safety risk?
The risk is that following drivers do not get a brake-light warning when active brake assist slows the vehicle. That failure to signal deceleration increases crash risk. If your VIN is included, arrange the free ABA software update with a franchised Fccc dealer.
When were owner letters mailed for this recall?
DTNA mailed owner notification letters on August 29, 2024. If you bought the vehicle used or never received a letter, check your VIN. The VIN decides whether your specific Fccc S2C or S2RV is included in recall 24V511.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V511000 |
|---|---|
| Fccc customer service | 800-745-8000 |
| NHTSA recall # | 24V511 |
| NHTSA recall # (full) | 24V511000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →