Owners report five distinct failure patterns affecting 2021 Ram 1500 brakes: sudden unintended brake engagement causing jerking or near-collisions; stalling with automatic parking brake engagement during acceleration or turns, often in traffic; loss of braking power or mushy pedal feel requiring extended stopping distance; ABS and electronic stability control warning lights with no underlying codes or with diagnostic trouble code U0415; and trailer brake controller malfunction or unavailability for towing.
Several owners describe high-speed stalls on highways at 75 mph with steering lockup and automatic e-brake engagement—extremely hazardous situations. Dealerships frequently cannot reproduce failures, offer only guesses (fuel pump, EVAP canister replacements), or declare no codes found despite safety events. Owners waiting on NHTSA Campaign 24V653000 (brake and ESC recall) report parts unavailable for extended periods; some have been told repair delays exceed reasonable timeframes. One owner reports a trailer brake controller on back order with 450 vehicles waiting. Dashboard warning lights are inconsistent—many events occur with zero warning. Owners report dealership service ranging from unhelpful to frankly dismissive, with at least one refusing free recall work and demanding admin fees.
Failure modes owners describe
Sudden unintended brake engagement and lockup
Brakes lock up or engage harshly without driver input while driving at speed or reversing, causing jerking that endangers occupants and risks collisions with other vehicles.
When: Throughout ownership, at any speed from 20 mph to 75 mph, including highway and backing situations
Symptoms owners cite: Sudden brake engagement without pedal depression; Harsh jerking of vehicle and occupants; Loss of vehicle control or ability to move after lockup; Wheels spinning after vehicle stops
Repairs/costs cited: No repairs documented; dealerships unable to diagnose or replicate
Recalls/TSBs owners mention: No recalls or TSBs mentioned by owners for this specific failure pattern
Stalling with automatic parking brake engagement during acceleration or turns
Engine shuts off without warning during turns from stops or during acceleration in traffic, simultaneously engaging the parking brake and sometimes illuminating warning lights. Creates hazardous situations as vehicle becomes immobilized in active traffic.
When: Occurring multiple times; reported at low speeds (under 25 mph turns), during acceleration after turns, and at stop-sign approaches
Symptoms owners cite: Engine stalls without warning; Parking brake automatically engages; Vehicle becomes immobilized and cannot move; No warning lights or alerts prior to failure; Dashboard warnings about autobraking/parking systems after failure occurs
Repairs/costs cited: No successful repairs; dealerships state cannot replicate issue; one repair involving software update (recall 37A) did not resolve problem
Recalls/TSBs owners mention: NHTSA Campaign Number 21V037000 mentioned by one owner (Service Brakes, Hydraulic), but unclear if applied; owners indicate issue persists even after recall attempts
Loss of braking power and mushy brake pedal
Brake pedal becomes spongey or mushy, traveling toward floorboard with reduced braking response. Requires multiple pedal depressions to achieve normal stopping, extending braking distance and creating collision risk.
When: At 30,000 to 71,000 miles; one incident while reversing downhill
Symptoms owners cite: Spongey or mushy brake pedal sensation; Brake pedal travels toward floorboard; Reduced braking power requiring harder pedal pressure; Extended braking distance; Abnormally loud sound from brakes; Brake message displayed on dashboard
Repairs/costs cited: Brake master cylinder failure diagnosed in one case; no repairs completed due to recall parts unavailability
Recalls/TSBs owners mention: NHTSA Campaign 24V653000 (Service Brakes, Hydraulic, ESC) and Campaign 21V037000 referenced; repair parts not yet available as of complaint dates
ABS and electronic stability control system failures with warning lights
ABS module or electronic stability control system fails, illuminating warning lights and sometimes disabling related systems. Diagnostic code U0415 (ABS failure) retrieved in one case. Failures may relate to wheel speed sensor malfunction or broader system issues.
When: At 35,000 to 110,000 miles; occurring both during driving and at rest
Symptoms owners cite: ABS warning light illuminated; Electronic stability control warning light illuminated; Anti-slip control warning light illuminated; Check engine warning light illuminated; Messages: 'Service Vehicle,' '4-wheel Drive Failure,' 'Service Brakes,' 'Brake Assist Disabled,' 'Battery Low Voltage'; Loss of power steering functionality; Vehicle deceleration without driver input
Codes mentioned: U0415 (ABS failure)
Repairs/costs cited: Wheel speed sensor replaced in one case without resolving failure; dealers attempting software updates; E-Torque generator replacement needed in one case but on backorder
Recalls/TSBs owners mention: NHTSA Campaign 24V653000 (Service Brakes, Hydraulic, Electronic Stability Control ESC); recall repair parts unavailable for extended periods; VIN tool confirms parts not available on multiple complaints
Trailer brake controller malfunction or unavailability
Trailer brake controller fails intermittently while towing or is unavailable/on extreme backorder at time of purchase. Intermittent failures generate fault messages and create danger when towing heavy loads, as trailer braking becomes unreliable.
When: Shortly after purchase (August 2021) or during initial towing; one case involved inspection in May 2021 with parts backordered for extended period
Symptoms owners cite: Trailer brake disconnected message displayed; Check Trailer Brake Wiring message displayed; Intermittent and unpredictable failure; Backup camera not working (related wiring issue)
Repairs/costs cited: Trailer brake control module replacement ordered and inspected by dealer but not installed due to parts backorder (450 orders waiting); electronic trailer brake controller (Mopar 82215278AE) on indefinite backorder at time of purchase
Recalls/TSBs owners mention: Dealer (Prestige Ram in Colorado) stated replacement of brake controller would resolve both camera and trailer brake issues; manufacturer unable to provide delivery timeline; vehicles shipped without trailer brake controller due to supply constraints
Synthesized from 39 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.