The 2015 Hyundai Santa Fe has a documented brake fluid leak in the ABS module that causes electrical shorts and engine compartment fires. Owners report smoke, flames, and vehicle fires—two vehicles became total losses. Recall campaigns 20V520000, 21V303000, and 23V651000 were issued, but repair parts have been unavailable for years. Dealerships installed electronic "limp-mode" software as a temporary fix instead of replacing the faulty module, which several owners rightfully rejected as unacceptable for a fire hazard.
Brake failure complaints span pedal requiring floor pressure to stop, sudden lockup during driving, jerky braking causing steering instability, and complete loss of brakes when the engine stalls. One owner at 26,750 miles experienced all four brake pads separating from their backing plates—a failure a 50-year veteran mechanic said he'd never seen—with wear sensors failing to alert him.
ABS warning lights and system faults appear across the mileage range, sometimes without vehicles being flagged for recalls despite identical model years being covered. One owner lost braking control during highway merging, resulting in a collision and total loss.
Hyundai has delayed recall remedies beyond reasonable timeframes, leaving owners unable to drive or park vehicles safely. The manufacturer denied warranty coverage for related engine failures, citing expired coverage while acknowledging the broader defect patterns.
Failure modes owners describe
Brake fluid leak in ABS module with electrical fire risk
Brake fluid leak in the anti-lock brake system can cause an electrical short circuit with potential fire in the engine compartment. Multiple owners report fire incidents in the engine bay traced to this defect.
When: 55,000–145,000 miles
Symptoms owners cite: Smoke from engine compartment; Flames near firewall; Vehicle fire or explosion risk; Multiple warning lights illuminated; ABS, hill assist, and traction control warning lights; 'BSD Cancelled' message displayed
Codes mentioned: ABS module fault, Check Engine Light illuminated
Repairs/costs cited: Dealers initially report ABS module not leaking; electronic update installed as interim measure. Owners report parts unavailable for extended periods. Some dealers refuse to replace module, only inspect. Fire extinguisher used by one owner to stop flames.
Recalls/TSBs owners mention: NHTSA Campaign Number 20V520000 (Service Brakes, Hydraulic), NHTSA Campaign Number 21V303000 (Service Brakes, Hydraulic), NHTSA Campaign Number 23V651000 (Service Brakes, Hydraulic). Recall Campaign 194 referenced. Electronic update software applied. Long delays in part availability reported; no remedy provided in timely manner per owners.
Brake pedal requires excessive pressure or locks up
Brake pedal must be depressed to the floorboard to achieve complete stop, or brakes lock up suddenly during driving, causing loss of control and steering instability.
When: Unknown; 92,225 miles reported
Symptoms owners cite: Brake pedal must be pressed to the floor for vehicle to stop; Brakes lock up while driving; Jerky or shaky braking; Loss of steering control; Vehicle stalls and loses power including brake function; Brakes do not work when engine loses power
Codes mentioned: Check Engine Light illuminated, Check Engine Light flashing
Repairs/costs cited: One owner needed engine replacement at 44,000 miles; warranty denied. Parts unavailable for recall repair. No repair completed in any complaint narrative.
Recalls/TSBs owners mention: NHTSA Campaign Number 20V520000 (Service Brakes, Hydraulic). Warranty denial for engine; owner referred to class action lawsuit phone number. Parts distribution disconnect noted in multiple complaints.
Brake pad wear-out and retention failure
Brake pads on all four wheels fell off their steel backing plates prematurely, becoming separated from the rotor interface. Pads were paper-thin on front axle despite vehicle having low mileage.
When: 26,750 miles
Symptoms owners cite: Brake pads fell off steel backing plates on all four wheels; Front pads paper-thin; rear pads worn but better condition; Brake wear sensors ('squealer') did not alert owner; Severe loss of braking capability
Repairs/costs cited: Catastrophic brake pad loss on all four wheels; owner noted never witnessed this failure mode in 50 years as a mechanic. No repair described; complaint issued as warning to other owners.
ABS warning lights and system malfunction without apparent active recall coverage
ABS warning lights, hill assist, and traction control warnings illuminate; 'BSD Cancelled' message displayed. Some owners report ABS module faults but dealership claims vehicle not included in recall despite owning identical model year.
When: 145,000 miles
Symptoms owners cite: ABS warning light illuminated; Hill assist warning light illuminated; Traction control warning light illuminated; 'BSD Cancelled' message displayed; ABS alarm message on dashboard
Codes mentioned: ABS module fault
Repairs/costs cited: One owner found ABS module problem but dealer denied recall eligibility. No repair performed.
Recalls/TSBs owners mention: Possible recall eligibility unclear to owners; dealer confirmation contradicts vehicle year/model alignment with known recalls.
ABS system failure during vehicle operation
ABS system failed during merging maneuver on highway, resulting in loss of braking control and collision.
When: Unknown
Symptoms owners cite: ABS failed during merging; Loss of braking control; Collision resulted
Repairs/costs cited: Vehicle totaled in collision.
Synthesized from 23 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.