The 22 complaints on this 2014 Optima brake cluster reveal a pattern of critical failures and recall execution problems. Brake system loss of stopping power is the most dangerous: multiple owners report the brake pedal becoming unresponsive or locking up during normal driving at speeds between 30 and 65 mph, resulting in collisions with guardrails, concrete structures, and other vehicles. Several vehicles were totaled; two owners sustained significant injuries including a sternum fracture and chest/back trauma.
Intermittent brake and ABS warning lights appear early in ownership and persist across multiple dealership visits without resolution, suggesting an underlying electrical or hydraulic issue the dealer cannot diagnose.
Engine fires account for four complaints—some while the vehicle sat parked unoccupied in a garage or driveway, others during driving at low speed. Fire department involvement was necessary in at least two cases.
Stalling during driving affects multiple vehicles at various speeds, sometimes repeatedly, and in some instances occurs alongside smoke or burning smells from the engine bay.
Fuel leaks and odors through cabin vents are reported despite fuel system recall campaigns being active.
Finally, brake recall parts (Campaign 21V331000) remain unavailable for extended periods, blocking timely repair completion. One owner was charged for unverified recall work; another dealership refused the recall because the vehicle had a salvage title. Owners consistently report the manufacturer has exceeded reasonable repair timelines.
Failure modes owners describe
Brake system failure - loss of stopping power
Multiple owners report complete or severe loss of braking capability during normal driving, causing vehicle collisions and crashes. Brake pedal either became unresponsive or required excessive pressure with no effect on stopping distance.
When: 67,000–151,000 miles; instances reported at various speeds (30–65 mph)
Symptoms owners cite: Brake pedal depressed but vehicle failed to stop; Brake pedal locked up without warning during depression; Brake pedal felt spongey and depressed to floorboard; Vehicle coasted uncontrollably after brake failure
Repairs/costs cited: No repairs completed in reported cases; vehicles totaled or not diagnosed at dealerships
Recalls/TSBs owners mention: Campaign 21V331000 (Service Brakes, Hydraulic) and 20V519000 issued; parts unavailable for extended periods; one case involved recall repair completion prior to unrelated failure
Check brake/ABS warning light - intermittent illumination
Intermittent illumination of brake and/or ABS warning lights, often accompanied by harder brake grab. Lights cycle on and off with restarts or over extended periods; traction control light also illuminates simultaneously in some cases. Pattern correlates with ambient temperature and driving conditions.
When: Early ownership (days after purchase); recurring throughout ownership; correlation with warm weather
Symptoms owners cite: Check brake light comes on intermittently during driving or immediately after stopping; Traction control light illuminates with brake light; Lights disappear after vehicle restart; Brake pedal grabs harder than normal before lights appear; Never illuminates while parked
Codes mentioned: Check brake light, ABS warning light, Traction control light
Repairs/costs cited: Multiple dealership visits; problem never resolved despite repeated attempts
Recalls/TSBs owners mention: Campaign 21V331000 (Service Brakes, Hydraulic) applicable; dealership unable or unwilling to diagnose root cause
ABS system internal leak and failure
ABS unit developed internal leak causing system failure. Vehicle history shows prior ABS recall repair that did not prevent subsequent failure. Owner informed replacement was necessary.
When: ~100,000 miles; after prior ABS recall repair
Symptoms owners cite: Vehicle failed to start; ABS failure reoccurred after recall repair
Repairs/costs cited: ABS system required replacement; vehicle not repaired at independent mechanic diagnosis
Recalls/TSBs owners mention: Recall repair had been completed; manufacturer requested vehicle be taken to another dealer for diagnosis
Engine fire or smoke - thermal runaway
Four complaints report engine fires or heavy smoke from engine compartment, in two cases while vehicle was parked unoccupied. One vehicle caught fire in the garage; another while parked in driveway. Two cases involved smoke and fire during driving at low speeds. Fire department involvement in at least two cases.
When: ~80,000–113,000 miles; one case timing unknown
Symptoms owners cite: Smoke from engine compartment; Flames visible from engine area; Fire department called to extinguish; Smoke from passenger side of engine; Vehicle caught fire while parked unoccupied
Repairs/costs cited: Vehicles destroyed; one fire department report filed; manufacturer inspector unable to determine origin due to fire damage
Recalls/TSBs owners mention: Campaign 23V652000 mentioned by owner (though VIN not included in recall); manufacturer case opened and vehicle inspected but origin could not be determined
Stalling during driving - loss of power
Vehicle stalls unexpectedly while driving at highway and city speeds, sometimes repeatedly. Stalling occurs with or without check engine light illumination and may be preceded by smoke or burning odor.
When: ~67,000–133,000 miles; at speeds from 5 mph to 65 mph; one case reported multiple occurrences
Symptoms owners cite: Vehicle stalls without warning while driving; Loss of all power to vehicle; Stalling occurs multiple times (recurring failure); Check engine light illuminated before stall; Smoke from engine compartment prior to stall; Burning odor from engine compartment
Codes mentioned: Check engine light
Repairs/costs cited: Vehicles towed to dealers; no diagnosis or repair completed; one owner attempted fire extinguisher use
Recalls/TSBs owners mention: Campaign 21V331000 owner concerned connection; no manufacturer response documented in most cases
Fuel leak and odor
Vehicle leaks fuel with noticeable odor in cabin. In one case, owner ran out of fuel multiple times despite adding fuel, indicating ongoing leak. Fuel odor enters through A/C vents.
When: ~100,000–103,748 miles
Symptoms owners cite: Fuel odor in cabin through A/C vents; Fuel leaking from vehicle; Vehicle runs out of fuel prematurely; Fuel odor present without check engine light
Repairs/costs cited: Dealer stated fuel leak unrelated to recall; repairs attempted blocked by parts availability for concurrent fuel system recall
Recalls/TSBs owners mention: Campaign 20V100000 and 21V331000 (fuel and brakes); parts unavailable for extended period; dealer withheld brake recall repair pending fuel system recall parts
Recall parts unavailability - extended delays
Brake system recall (Campaign 21V331000) parts were unavailable for extended periods, preventing timely repairs. Manufacturer exceeded reasonable timeframe for providing parts. One case involved dealer charging for unverified recall work.
When: Delays occurring during recall notification period (2021–2023)
Symptoms owners cite: No parts available for brake recall repair; Manufacturer exceeded reasonable repair timeframe; Dealer unable to complete recall; Dealer charged fee for unverified recall work at another location
Repairs/costs cited: Parts delays prevented repair completion; one case owner charged without confirmation of work; one dealer refused recall on salvage-title vehicle
Recalls/TSBs owners mention: Campaign 21V331000 parts distribution disconnect documented across multiple cases; manufacturer directed owners to alternate dealers with similar results
Synthesized from 22 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.