The 2025 Wagoneer S electrical system is producing a constellation of critical failures. The most dangerous reported issue is loss of motive power: vehicles enter "limp" or "turtle mode" during highway driving at speeds of 60–80 mph, decelerating drastically without driver input and refusing to accelerate. Some owners report the vehicle stalling completely and blocking active traffic lanes. This failure repeats 1–3+ times per month in some cases; a few owners say dealerships have performed software updates, part replacements, and calibration procedures without lasting results. One owner's vehicle spent 5 weeks in the shop after a near-fatal failure at 80 mph near highway merges.
A separate brake-system issue: brake lights illuminate only when the vehicle comes to a complete stop, not during regenerative braking. Following drivers have no visual warning the vehicle is slowing, and multiple owners report near-collisions because of this blind spot.
Owners also describe complete electrical failures where the vehicle becomes "bricked"—unable to power on, charge, or respond to input—or enters transmission lock with all warning lights flashing, rendering it immobile. One owner reported losing brakes entirely with "NO ABS" warnings while driving on a busy road. Level 3 DC fast charging fails reliably despite manufacturer claims of 28-minute charge time; a dealership explicitly told one owner not to rely on fast charging.
Electronic parking brake engagement during motion, unexpected forward surge followed by complete power loss, and accelerator loss in limp mode with sudden acceleration on pedal release round out the patterns. Dealership service delays routinely exceed 3 weeks, and some vehicles return to the shop within days of pickup after repair attempts.
Failure modes owners describe
Loss of motive power / limp mode (turtle mode)
Vehicle enters reduced-power mode (limp/turtle mode), decelerates drastically, loses acceleration response, or stalls completely without warning while driving. Owners report the vehicle becoming immobilized and requiring restart or towing.
When: While driving at highway speeds (60–80 mph) and city speeds; occurs 1–3+ times per month in some cases; within first few months of ownership
Symptoms owners cite: Vehicle decelerates from highway speed (80 mph to 20–40 mph) without driver input; Loss of accelerator response; pedal press produces no acceleration; Vehicle stalls or stops completely in traffic; Turtle icon displayed on instrument cluster; Warning lights: high-voltage battery system, electronic stability control, service electrical system; Vehicle may require 20 minutes to reset and restart
Codes mentioned: Loss of communication with high-voltage battery systems, Turtle mode indicator, Service Electrical System error
Repairs/costs cited: Dealership has performed software updates, actuator calibration, and part replacements from other vehicles without lasting resolution; some vehicles remain in shop 28–35 days; repeated failures after repair
Recalls/TSBs owners mention: Stellantis aware of issue; no permanent fix provided; some owners report no assistance from manufacturer
Brake light failure—lights do not illuminate during regenerative braking
Brake lights illuminate only when the vehicle comes to a full stop, not when regenerative braking is engaged. This creates a critical safety hazard because following drivers have no visual warning that the vehicle is slowing.
When: Ongoing since lease/delivery; during normal driving
Symptoms owners cite: Brake lights remain dark while vehicle is slowing down via regenerative braking; Brake lights only illuminate when vehicle reaches complete stop; Following vehicles positioned too closely because drivers unaware vehicle is decelerating
Repairs/costs cited: Dealership unable to resolve; owner has photos of the failure
Recalls/TSBs owners mention: Collision safety feature turned off to attempt fix, but did not work or last
Unexpected forward surge followed by complete loss of power
Vehicle surges forward with force, then loses all battery power, leaving owner stranded. Multiple repair attempts (8–10) have failed to fix the recurring problem.
When: Recurring; highway driving at speeds exceeding 80 mph; approximately 5 weeks in shop after latest incident
Symptoms owners cite: Unexpected violent acceleration forward; Abrupt loss of all battery power and propulsion; Vehicle blocking active traffic lanes; Complete system failure requiring towing
Repairs/costs cited: Multiple technicians, engineers, and an investigator have attempted diagnosis and repair 8–10 times without success; vehicle towed and remained in shop 5 weeks
Recalls/TSBs owners mention: Stellantis offered $1,000 goodwill gesture; owner seeking full buyback
Stalling and abrupt forward lurch (simulating rear-end collision sensation)
Vehicle stalls, then suddenly lurches forward with abrupt acceleration. Creates feeling of being rear-ended and poses hazard to occupants and traffic.
When: Multiple occurrences over 6 months of ownership
Symptoms owners cite: Vehicle stalls without warning; Abrupt forward lurch; Sensation of being rear-ended; Unpredictable acceleration after stall
Repairs/costs cited: Dealership sent out multiple engineers; defect remains unresolved despite ongoing attempts
Recalls/TSBs owners mention: Multiple engineer visits; no permanent fix; manufacturer continues to sell model despite known issue
Loss of braking capability with ABS failure
Complete loss of brakes with ABS system failure indicated by 'NO ABS' warning. Occurred without prior warning while driving on busy road; owner narrowly avoided collision.
When: Sudden onset while driving on busy road; second occurrence Friday, April 17, 2026 (at approximately 4,801 miles)
Symptoms owners cite: All service lights and warning lights flashing; NO ABS brakes warning displayed; Complete loss of braking ability; Occurred without warning; Vehicle unable to stop until reaching downhill section and pulling to gas station curb
Codes mentioned: NO ABS brakes fault
Repairs/costs cited: Dealership has inspected twice; service manager advised against driving vehicle after updates completed; issue may remain unresolved; odometer reading displayed incorrectly as 77,000 miles when actual mileage approximately 4,801
Recalls/TSBs owners mention: Dealership service manager advised not to drive vehicle due to safety concerns; updates attempted but issue unresolved
DC fast charging (Level 3) failure and no-start condition
Vehicle fails to charge reliably on Level 3 (DC fast) chargers despite manufacturer specification of 5–80% charge in 28 minutes. Intermittent no-start condition and stranding risk; dealership advised against using Level 3 charging.
When: Ongoing for several months since delivery
Symptoms owners cite: Vehicle fails to charge on higher-power DC fast chargers; Charging error messages displayed; Intermittent no-start condition requiring power-off and restart cycle; Infotainment screens intermittently fail to turn on; Practical usable range significantly reduced if Level 2 charging only available
Codes mentioned: Electrical/charging system fault
Repairs/costs cited: Repair order documentation attached by owner
Recalls/TSBs owners mention: Dealership engineering/service manager verbally advised owner not to use Level 3 charging and stated they cannot guarantee Level 3 charging will work
Transmission lock and no-drive condition with warning lights
Vehicle enters transmission lock, displays multiple transmission, electrical system, and drivetrain warnings, and becomes immobile. Vehicle cannot be shifted into gear; all warning letters on gear shift illuminated red.
When: Hours to days after charging and driving; first few months of ownership
Symptoms owners cite: Vehicle will not go into gear when turned on; All letters on gear shift illuminated red; Multiple warning lights: transmission, service transmission, electronic stability control, blind spot alert, autopark, EV system, red wrench icon; Vehicle cannot be turned off (states not in park); Vehicle eventually goes dark; dead battery prevents access to rear hatch/battery access; Notifications of 317 mph speed (erroneous readout)
Codes mentioned: Transmission fault, Service transmission, Electronic stability control, Autopark fault, EV system fault
Repairs/costs cited: In shop 3 times in 10 months for same issues; towed twice within one month of purchase; dealership refusing to provide loaner despite warranty; repair timeline extended (week or longer)
Recalls/TSBs owners mention: None documented; owner describing vehicle as lemon with unfixable issues
Electronic parking brake engages unexpectedly during driving
Electronic parking brake activates without driver input while vehicle is in motion, causing sudden deceleration. Cannot be manually released. Hazard for rear-end collision and loss of control.
When: During normal driving (not limited to startup or low-speed)
Symptoms owners cite: Parking brake engages without driver action; Sudden deceleration while vehicle in motion; Cannot manually release parking brake; Unpredictable behavior; Occurs repeatedly
Accelerator response loss with unexpected acceleration after pedal release
Intermittent loss of accelerator response while in reduced-power mode; when accelerator pedal is released, vehicle accelerates unexpectedly and rapidly. Electronic stability control and high-voltage system warnings present.
When: After vehicle has been driven (not limited to startup); multiple occurrences with children passengers
Symptoms owners cite: Loss of accelerator response when pedal is pressed; Unexpected rapid acceleration when pedal is released; Vehicle enters reduced-power/limp mode during intersection driving; Warning indicators: electronic stability control, high-voltage system; Loss of communication with high-voltage battery systems; Unpredictable and unsafe behavior
Codes mentioned: Loss of communication with high-voltage battery systems, Electronic stability control warning
Complete electrical system failure / vehicle becomes bricked
Entire electrical system fails; vehicle cannot turn off, stuck in gear, or completely unresponsive. Vehicle becomes fully immobilized (bricked) and will not power on or charge.
When: Hours to days after delivery or driving; 2–3 days after owning vehicle; after 28-day shop visit
Symptoms owners cite: Vehicle unable to turn off; Stuck in gear; Vehicle will not turn on; Vehicle will not charge; No response to any input; Complete system shutdown requiring dealership intervention
Codes mentioned: Service Electrical System error
Repairs/costs cited: Vehicle remains unresponsive for days; dealership and Stellantis unresponsive to owner calls
Recalls/TSBs owners mention: No response from Stellantis or dealership for 3+ days after failure
Instrument cluster / main screen failure
Main instrument cluster or infotainment screen fails to communicate or display information. Screen boots slowly, then completely fails. Disables multiple safety systems.
When: Early in ownership; intermittent then persistent
Symptoms owners cite: Main screen does not communicate with vehicle systems; Infotainment screens fail to turn on intermittently; Screen boots slowly; No speedometer display; Disables turn signals and blind spot monitoring; One-pedal drive mode turns on and off randomly
Codes mentioned: Screen communication failure
Repairs/costs cited: Dealership diagnosis: screen not communicating
12-volt battery failure
12-volt battery cell failure causing complete power loss. Vehicle recovered briefly, then turtle mode error and unexpected forward jerking occurred.
When: 7 days after vehicle ownership
Symptoms owners cite: Vehicle dies completely (bricked); After replacement, turtle mode error occurs; Vehicle jerks forward unexpectedly; Near miss with pedestrian and vehicle in front
Codes mentioned: 12-volt battery fault
Repairs/costs cited: Dealership diagnosed cell failure in 12-volt battery and replaced it; failure recurred within 30 minutes of driving
Keyless entry and auto lock/unlock malfunction
Keyless entry and automatic lock/unlock features malfunction since lease/delivery. Recurring issue without resolution despite multiple complaints.
When: Since lease/delivery; ongoing for months
Symptoms owners cite: Keyless entry not functioning properly; Auto lock/unlock features not working
CarPlay navigation system malfunction
Infotainment maps not in sync with reality; displays steering wheel icon and 0-mile directions. System displays confusing or incorrect information.
When: During normal driving
Symptoms owners cite: Maps not synced with actual vehicle location; Steering wheel icon displayed incorrectly; Zero-meter directions shown; Directions make no sense with actual driving location
Creep mode malfunction
Creep mode (designed to maintain creeping forward in traffic) does not function as intended.
When: During stop-and-go driving
Symptoms owners cite: Creep mode does not maintain intended behavior
Accelerator hypersensitivity
Accelerator pedal exhibits hypersensitive response compared to normal operation. Makes vehicle feel dangerous to drive.
When: During normal highway and street driving
Symptoms owners cite: Accelerator pedal hypersensitive to input; Jumpy driving behavior even in auto mode; Vehicle behavior changed from normal; Safety concern due to unpredictable response
Right fog light failure
Right fog light does not illuminate.
When: During normal operation
Symptoms owners cite: Right fog light out
Battery regeneration level unavailability
Battery regeneration level information not available to driver. Associated with multiple dysfunctions including jumpy acceleration and performance issues.
When: Ongoing since lease/delivery
Symptoms owners cite: Battery regeneration level data unavailable; Dysfunction cascading to other vehicle systems
Random onboard camera activation
Onboard camera system activates randomly during driving without driver input. Sign of erratic vehicle behavior.
When: During normal driving
Symptoms owners cite: Camera activates without input; Occurs randomly
Door latch failure (hood or door)
Door or hood latch fails while driving, causing sudden deceleration and safety hazard.
When: While driving at highway speeds
Symptoms owners cite: Hood latch fails unexpectedly; Vehicle immediately decelerates from ~60 mph to ~20 mph; Dangerous situation in traffic
Repairs/costs cited: Vehicle had to be towed; owner not comfortable with recall solution
Recalls/TSBs owners mention: Recall issued; dealership overwhelmed and cannot schedule service for 3 weeks
Soft/slow infotainment screen boot and stuck screens
Infotainment screens boot slowly or become stuck on unexpected displays. Screen can go completely blank.
When: During normal operation
Symptoms owners cite: Screen boots slowly; Screen stuck on unfamiliar parking display; Screen goes blank
Synthesized from 27 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.