Halcore Group (Halcore) is recalling certain 2018-2020 Horton Emergency Vehicles (HEV) Type I & Type III ambulances built on a Ram 4500 or 5500 chassis and equipped with Compressible Liquid Adaptive Suspension Systems (C.L.A.S.S.), part numbers DS135RS3A, DS135RS3AF, DS135RS3-DM. The rear brake caliper flexible line may have been routed so that it contacts a suspension component, possibly causing excessive wear and a loss of rear brakes. The affected system component is the rear brake caliper flexible line which may be causing brake caliper to wear due to contact suspension components.