Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
full bulletin at NHTSA ↗2014 FIAT 500L electrical problems
moderate 11 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
11
Recalls
0
Avg fix
$850
When does it fail?
Of the 11 electrical complaints filed for the 2014 FIAT 500L, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
No new NHTSA electrical complaint has been filed on this vehicle in over 7 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering electrical on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
full bulletin at NHTSA ↗Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
full bulletin at NHTSA ↗Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On
full bulletin at NHTSA ↗WIRING, Body Before replacing this harness, please contact FCA Redacted Content to see if a repair kit is available for your application. If no response in 15 minutes, proceed with repair. Please email pictures of harness defects to FCA Redacted Content
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report recurring engine stalling and loss of power starting as early as the first year of ownership and continuing throughout the vehicle's life. Check engine lights flash, vehicles lose power mid-drive, and some stall completely while driving. One owner had multiple repair attempts across three dealers, with mechanics unable to identify the root cause until a control module failure was found—but replacing it didn't stop the stalling. A recall update (NHTSA 17V192000) promised a fix, but the problem returned.
The transmission shift mechanism fails consistently: vehicles won't shift smoothly out of Park, get stuck in Park, or respond slowly to gear selection. One owner reports the vehicle coming to a complete stop while driving.
A widespread ambient temperature sensor problem affects multiple 500L owners identically. The sensor reads 30 degrees Fahrenheit lower than actual outside temperature, breaking the HVAC system completely. Owners who replaced the entire driver-side mirror assembly containing the sensor experienced the same failure within months on the replacement part.
Random acceleration during highway driving—including unintended cruise control acceleration and sudden deceleration with foot on the pedal—create safety hazards. RPMs rev to redline at low speeds. One owner paid $2,000 for a PCM replacement after a previous recall "fix" failed, with symptoms unchanged.
Battery drain from keys stuck in the ignition and check engine lights at very low mileage round out the electrical complaints.
Failure modes owners describe
Engine stalling and loss of power
Vehicle stalls while driving, sometimes repeatedly. Check engine light flashes; vehicle loses power and decelerates independently even with accelerator pedal depressed. Requires restart to resume driving. Owners report this recurring after dealer service and even after warranty recall updates.
When: 14,926 miles and beyond; recurring multiple times over vehicle lifetime; some reported within first year of ownership
Symptoms owners cite: Vehicle stalls while driving at highway speeds and in traffic; Check engine light flashing; Radiator warning light illuminated; Loss of power and independent deceleration; Engine shuts down completely while driving; Lagging and jerking while driving
Codes mentioned: Check engine light, Control module failure codes
Repairs/costs cited: Dealers identified control module failures and attempted updates under recall campaign 17V192000. Owners paid up to $2,000 for replacement when recall remedy failed. Issue persisted after repairs.
Recalls/TSBs owners mention: NHTSA Campaign 17V192000 (Powertrain); recall update applied but failed to resolve stalling; manufacturer promised callback (not verified as completed)
Transmission shift and gear selection failure
Automatic transmission fails to shift smoothly into or out of Park. Vehicle stuck in Park or unable to enter Park. Transmission slow to receive intended gear selection or fails to respond.
When: Throughout vehicle ownership; no specific mileage cited
Symptoms owners cite: Will not shift out of Park readily; Won't go into Park sometimes; Transmission slow or fails to receive intended gear selection; Vehicle came to complete stop while driving; Message states 'no manual mode available'
Ambient temperature sensor malfunction
Driver-side mirror-mounted ambient temperature sensor reads 30 degrees Fahrenheit colder than actual temperature consistently. Affects HVAC operation; air conditioning will not cool and heating malfunctions. Multiple owners report same issue. Replacing entire driver mirror assembly and sensor does not resolve problem—same malfunction recurs within months on replacement units.
When: Affects temperature reading 100 percent of the time, whether vehicle is moving, stationary, or parked; issue persists across multiple replacement attempts
Symptoms owners cite: Ambient temperature reads 30 degrees F lower than actual outside temperature; AC will not cool on hot days (e.g., 90°F reads as 60°F); Heating blows warm air on mild days (e.g., 80°F reads as 50°F); Malfunction occurs when vehicle is moving or parked
Repairs/costs cited: Owners purchased replacement driver-side mirror assemblies containing new ambient temperature sensors; sensor failure recurred within months on replacement units. Parts availability limited.
Random acceleration and throttle control issues
Vehicle experiences unintended acceleration and throttle control problems. Cruise control accelerates on its own without driver input. Vehicle decelerates randomly while foot is fully on accelerator pedal during highway driving. RPMs rev to redline at low speeds. Owners suspect throttle body or sensor malfunction.
When: Occurring during highway and full-speed traffic driving
Symptoms owners cite: Random acceleration without driver input; Cruise control accelerates on its own; Vehicle decelerates while accelerator pedal is fully depressed; RPMs rev to redline while only traveling 35 mph; Nearly caused collision on highway
Repairs/costs cited: Possible throttle body issue per owner; owner paid approximately $2,000 for PCM replacement that did not resolve the issue
Recalls/TSBs owners mention: PCM had been recalled and 'fixed' with previous owner in 2017, but issue recurred; recall remedy did not address underlying problem
Battery drain and key stuck in ignition
Key cannot be removed from ignition while vehicle is parked, causing rapid battery drain. Two instances reported on vehicle with fewer than 2,000 miles at only five months old. Vehicle will not start due to dead battery.
When: Within first five months of ownership; fewer than 2,000 miles
Symptoms owners cite: Key will not come out of ignition; No dashboard lights illuminate; No clicking sounds when attempting to start; Vehicle will not start; Rapid battery drain while parked
Check engine light and sensor failures
Check engine light illuminates at low mileage. Dealer identifies sensor failure requiring replacement, but required part is unavailable. Owner reports unusual odor inside vehicle associated with this failure.
When: Approximately 1,000 miles
Symptoms owners cite: Check engine indicator illuminated; Abnormal smell inside vehicle causing family illness
Repairs/costs cited: Sensor replacement needed but part not available from dealer
Synthesized from 11 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Car continues to have problems 3/2/15 car stalled months following purchase of the car new told it was a issue with the cold temps and battery was not swapped upon arrival in us. Months later 11/17/15 the call began to stall again in heavy traffic and told a recall was issued and he car needed to be updated and it will correct the issue. Car immediately started to stall 12/17/15 and back in the…
Car will not shift into gear automatic transmissions will not shift readily out of park and won’t go into park sometimes. The transmissions does not receive, or is slow to receive, an intended gear selection. Vehicle came to a complete stop while driving. Get message there is no manual mode available.
Had electrical trouble with your 2014 FIAT 500L?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the electrical problem on the 2014 FIAT 500L?
It's a documented issue but not catastrophic. 11 complaints have been filed. Repairs average $850 and most owners catch it before it causes a breakdown.
At what mileage does the electrical typically fail?
Based on the 11 complaints filed, electrical issues most often appear around 38,087 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $850 for electrical repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to electrical?
No active recalls currently cover electrical issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2014/FIAT/500L.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.