Key Takeaway
Incorrectly Plumbed Air System Check Valve by Daimler Trucks North America LLC was recalled on June 20, 2018. What to do: DTNA will notify owners, and dealers will inspect and repair the check valve as needed, free of charge. The recall began on August 12, 2018. Owners...
Incorrectly Plumbed Air System Check Valve
Description
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2018 Thomas Built Buses Saf-T-Liner EFX transit buses. The check valve for the air brake system may not be plumbed correctly which can cause the primary air system to not be isolated from the secondary air system.
Injuries / Consequence
In the event of a rapid loss of air pressure in the secondary system, the incorrectly plumbed check valve can cause rapid air loss in both secondary and primary system, causing the parking brakes to activate suddenly. This will increase the risk of a crash.
Remedy
DTNA will notify owners, and dealers will inspect and repair the check valve as needed, free of charge. The recall began on August 12, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-774.
Products Affected
Vehicle
VehiclesCompany Information
Daimler Trucks North America LLC
Unknown location
View all 367 recalls by Daimler Trucks North America LLC →Related Recalls
Heater Hose May Rupture and Leak
February 25, 2026
Heater Hose May Leak Hot Heating Coolant Inside Passenger Compartment
February 17, 2026
Heater Hose May Leak Hot Heating Coolant Inside Passenger Compartment
February 17, 2026
Improper Battery Connection May Cause Fire
February 12, 2026
Wheelchair Restraint Retractor May Not Lock
December 10, 2025
Wheelchair Restraint Retractor May Not Lock
December 10, 2025
Frequently Asked Questions
Is this recall still active?
Check the status badge at the top of this page. "Ongoing" means the recall is still active and you should follow the remedy instructions. "Completed" or "Terminated" means the recall process has concluded, though the safety issue remains relevant for any unrepaired products.
How do I check if my product is affected?
Compare the model number, lot code, serial number, or date range listed in the recall notice with the information on your product's label or packaging. For vehicles, check your VIN at NHTSA.gov/Recalls.
What remedy is available for this recall?
The listed remedy for this recall is: DTNA will notify owners, and dealers will inspect and repair the check valve as needed, free of charge. The recall began on August 12, 2018. Owners may contact DTNA customer service at 1-800-547-071...
Where can I find the original recall notice?
This recall was issued by NHTSA. You can view the original notice using the link provided above.