TELEMATICS SERVICE INFORMATION HINT: This bulletin applies to vehicles equipped with a 4G network compatible TCU. TCUs compatible with 3G network only are no longer supported. SERVICE INFORMATION The APPLIED VEHICLES that come equipped with a factory installed SOS switch, located near the overhead map lamp, also come equipped with a wireless communication device called a Telematics Communication Unit (TCU). With an active NissanConnect® Services subscription, the TCU communicates with the NissanConnect® Services Data Center to provide various security and convenience services. This bulletin contains important service procedures that must be performed properly in order to set-up and maintain
full bulletin at NHTSA ↗2018 Nissan Leaf electrical problems
severe Owners of the 2018 Nissan Leaf have filed 15 NHTSA complaints about the electrical at roughly $850 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See electrical across all vehicles →
Complaints
15
Recalls
0
Avg fix
$850
| Model year | electrical complaints |
|---|---|
| 2014 Leaf | 5 |
| 2015 Leaf | 16 |
| 2016 Leaf | 11 |
| 2018 Leaf (this page) | 15 |
| 2019 Leaf | 162 |
| 2020 Leaf | 113 |
| 2021 Leaf | 29 |
1crash
When does it fail?
Of the 15 electrical complaints filed for the 2018 Nissan Leaf, here's the actual mileage breakdown — failures cluster heaviest at 50,000-75,000 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
Electrical accounts for 23% of all owner complaints filed against this vehicle, across 7 categories tracked.
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.
INTELLIGENT CRUISE CONTROL INOPERATIVE AND AEB/FEB WARNING LIGHT ON OR RADAR OBSTRUCTION MESSAGE DISPLAYED WITH DTC C1A16 OR C2582 IF YOU CONFIRM IMPORTANT: The purpose of ACTION (on the next page) is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair. Nissan Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe that a described condition may apply t
full bulletin at NHTSA ↗AUTOMATIC EMERGENCY BRAKING WARNING LIGHT BLINKING APPLIED SYSTEMS: Vehicles equipped with a lane camera (see Figure 1) SERVICE INFORMATION If the Automatic Emergency Braking (AEB) warning light or is blinking (but not illuminated steadily) or the customer states it is blinking, and there are no related DTCs, inspect the windshield. A blinking AEB warning light may occur under the following conditions: When contamination or foreign material adhere to the lane camera viewing window on the windshield. When driving while it is snowing or when frost forms on the lane camera viewing window on the windshield. When the lane camera viewing window on the windshield is temporarily fogged up. Fig
full bulletin at NHTSA ↗LANE CAMERA AIMING VEHICLE REFERENCE VALUES NOT IN ESM SERVICE INFORMATION If the lane camera requires aiming, the values in Table A on page 4 must be used. For all other models/model years, consult the Electronic Service Manual (ESM).
full bulletin at NHTSA ↗Subject: REVISION 2 R23D7 2018-2022 LEAF Rear View Camera Inspection - NCIR - Dealer Announcement REVISION 2 Please discard earlier versions of this bulletin. The announcement from May 20, 2024 has been revised to include the following: • The remedy and parts are now available, please refer to NTB24-034 to remedy any vehicle affected by this campaign Parts for this campaign are on restriction and can be ordered via DBS. The parts restriction will be removed and dealers can order, as needed, via normal ordering process beginning July 19, 2024. Part number 24271-ZW40A (Protector Harness Kit) will be automatically shipped to dealers beginning July 1, 2024. The Protector Harness Kit will r
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report the 2018 Leaf experiences sudden electrical system failures that disable critical driving functions without warning. The most dangerous incidents involve complete loss of propulsion at highway speed (65-70 MPH) or brake failure during low-speed maneuvers. One owner lost all drive power on a freeway, forcing a dangerous five-lane crossing at 30 MPH to reach the shoulder; another had brakes fail in reverse and had to use the emergency brake.
12V battery failures appear linked to multiple incidents: loss of brake response, "Service EV System No Power" messages, and vehicle immobilization. One owner's 12V battery failed with no prior dashboard warning despite 85% HV charge remaining. High-voltage battery problems also emerge—owners report rapid range loss (from 150 to 80-100 EPA miles), erratic charge readouts that swing from 73% to 8% in minutes, and bloated battery cells from overheating. Failures often recur shortly after dealer repairs; one owner's HV battery error reappeared within 36 hours.
Cold weather (17°F and 45°F) triggers protective shutdowns and speed limiters that reduce highway driving to 20-25 MPH. Automatic emergency braking engages falsely during normal low-speed acceleration. One used vehicle purchased with multiple warning lights was deemed unsafe by the dealer and eventually declared a Lemon by Nissan. The traction motor inverter can fail without warning, and one owner discovered the infotainment touchscreen can lock permanently if a specific SOS button sequence is performed during power-off.
Same Nissan Leaf electrical reports on nearby years: 2015 · 2016 · 2019 · 2020 · 2021
Failure modes owners describe
12V Battery Failure
12V battery depletion causes loss of electrical power, brake function, and prevents vehicle restart. Owners report the battery can fail without prior warning lights.
When: Intermittent; one complaint noted 85% HV charge remaining before 12V failure; another during cold weather at 79,545 miles
Symptoms owners cite: Service EV System No Power message; Brakes become unresponsive or spongy; Multiple dashboard warning lights; Vehicle will not start after power-off; Loss of power while driving
Codes mentioned: Service EV System No Power
Repairs/costs cited: Dealer replaced 12V battery; in one case owner did not receive battery light warning before complete failure
High-Voltage Battery Malfunction and Rapid Discharge
HV traction battery experiences rapid depletion, thermal issues (bloated cells), and voltage system isolation faults. Failures occur even on recently replaced batteries and result in vehicle immobilization.
When: One complaint at 6 months post-HV battery replacement; another at 53,000 miles; temperatures ranging 45°F to Arizona heat
Symptoms owners cite: Rapid energy drain reducing range from 150 to 80-100 miles EPA; Battery charge display fluctuates erratically (73% to 8% to 70% in minutes); Service EV System warning light; Vehicle will not restart after overnight charge despite 80% state of charge; High voltage battery malfunction warning; Bloated battery cells detected
Codes mentioned: P0AA6-1A (HV battery voltage system isolation), Service EV System
Repairs/costs cited: HV battery replaced under warranty after 3 weeks of troubleshooting; in one case error recurred within 36 hours of repair
Recalls/TSBs owners mention: Warranty coverage for HV battery replacement; case opened for cold weather failure
Traction Motor Inverter Failure
Traction motor inverter fails without warning, causing immediate loss of drive power and forcing vehicle into neutral at highway speed.
When: Less than 6 months after HV battery replacement; no prior warning signs
Symptoms owners cite: Vehicle placed into neutral without driver input; Loss of all drive power at highway speed (65 MPH); EV Maintenance Needed message on dashboard; Rapid deceleration without braking
Codes mentioned: EV Maintenance Needed
Repairs/costs cited: Traction motor inverter replacement required; no prior diagnostic indication of failure
Automatic Emergency Braking (AEB) False Activation
AEB engages abruptly with no collision hazard present, causing sudden hard braking. System also displays erratic off-mode warnings without user interaction.
When: Early 2021; another complaint during 45°F weather while freeway driving
Symptoms owners cite: AEB engages while slowly accelerating in low-speed turn-lane maneuver; Multiple dashboard warning lights illuminate; AEB off-mode warning flashes without setting change or collision detection; Battery charge display fluctuation coinciding with AEB warnings
Repairs/costs cited: One complaint notes dealer found 12V battery was root cause; issue resolved after 12V battery replacement
Brake System Loss of Function
Brake pedal becomes unresponsive or loses pressure during normal braking, requiring use of emergency brake to stop vehicle. Occurs both during regular braking and reverse maneuvers.
When: August 2021 during parking lot reverse maneuver; another at 70 MPH on freeway with 12V/charging warnings
Symptoms owners cite: Brake pedal unresponsive or spongy with multiple pedal applications required; Brake pedal goes to floor with erratic pulsing and minimal stopping power; Vehicle continues rolling backward or coasting despite brake pedal application; No dashboard warning lights prior to failure in some cases
Repairs/costs cited: In one case, 12V battery replacement resolved issue; in another, emergency brake used to stop vehicle on freeway, required towing
Cold Weather Power Loss (Protective Safe Mode)
Vehicle enters protective safe mode during cold weather (17°F and 45°F ambient) and loses propulsion or is severely limited. One complaint attributes this to frozen battery.
When: 17°F weather at 79,545 miles; 45°F during freeway driving; recurred multiple times
Symptoms owners cite: Service EV System No Power message in 17°F conditions; Vehicle unable to maintain propulsion uphill in cold weather; Speed reduced to 20-25 MPH from 60-65 MPH without driver input; Vehicle enters protective safe mode due to faulty signal
Codes mentioned: Service EV System No Power
Repairs/costs cited: One complaint note suggests issue related to variable voltage control system and 12V battery amp-hours; dealer noted frozen battery after thaw could be recharged; issue recurred multiple times with no repair completed
Recalls/TSBs owners mention: Manufacturer made aware and opened case; issue characterized as known failure in cold weather
Sudden Power Loss and Loss of Brake Control at Highway Speed
Vehicle suddenly loses all electrical power, enters limp mode, and brakes fail while driving at highway speed, forcing emergency maneuver.
When: One at 70 MPH on freeway with prior 12V/charging warnings; another at 65 MPH descending grade
Symptoms owners cite: Dash lights illuminate with 12V and charging warnings; Acceleration and brake pedals stop responding; Vehicle forced into neutral; Vehicle decelerates rapidly from highway speed; Brake power completely lost requiring emergency brake
Codes mentioned: 12V warning, Charging system warning
Repairs/costs cited: One vehicle required emergency maneuver (driven into jersey wall) to stop; towed after incident
Touchscreen Display Lockup (SOS Button Vulnerability)
Infotainment touchscreen locks up if SOS call is initiated and held while powering off vehicle. Screen remains non-functional until SD card is physically removed and reinserted.
When: Reproducible via specific button sequence
Symptoms owners cite: Touchscreen becomes unresponsive and locked; Display remains locked after vehicle power cycle; Only physical SD card removal/reinsertion clears lock state
Repairs/costs cited: SD card removal and reinsertion required to clear lockup
Recalls/TSBs owners mention: Owner reported issue to Nissan with no response received
Multiple Electrical System Failures (Seat Belt/Airbag Warnings, Satellite Communications)
Multiple warning lights and loss of satellite communications functionality occur on used vehicle purchase. Manufacturer declared vehicle a Lemon after multiple failed repair attempts and issued refund.
When: Within short period after December 2022 purchase; continued through March 2023
Symptoms owners cite: Seat belt warning light illuminates; Airbag warning light illuminates; High voltage battery malfunction warning; Satellite communications system inoperative
Codes mentioned: High voltage battery malfunction
Repairs/costs cited: Attempted repair by HGreg Nissan; dealer deemed vehicle unsafe to drive and did not return it except for one test drive
Recalls/TSBs owners mention: Nissan North America declared vehicle a Lemon under Florida law on August 3, 2023 and issued purchase price refund; vehicle intended for wholesale resale despite Lemon designation
Synthesized from 15 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
I was traveling north on Freeway 57 at approximately 70mph. The dash lit up red with 12v and charging warnings. Power was shut off and car went into Neutral and warned me to pull over. This is an incredibly busy freeway and I was in the far left lane. I barely made it to the shoulder coasting before car started shuttering and jerking and stopped rolling. I could have been killed.
The contact owns a 2018 Nissan Leaf. The contact stated while driving 55 MPH, there was a rapid battery discharge. There was no warning lights illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 53,000.
Vehicle would rapidly suffer from a high energy drain when driving at freeway speeds. Range was reduces from 150 miles EPA, to 80-100 miles. Nissan at first said it was due to the high temperature in Arizona. A few weeks later a "Service EV System" lamp came on, and car would not start the next day after charging overnight. Car stated it was at %80 state of charge at the time. Car was towed to a…
Around 45 degree weather, while driving on the freeway, my electric battery mileage started to fluctuate erratically (73% to 8% to 14% back to 70% and finally to 60%). It gave me low battery warnings two separate times. At the same time this happened, a warning light indicating the AEB had been turned off started flashing on my dashboard without any collision, jerky movements, sudden stops, or…
Hello NHTSA: I purchased a 2018 Nissan Leaf from Carvana on December 29, 2022. Within a short period of time the car experienced seat belt and air bag warning lights. The car was repaired under factory warranty by HGreg Nissan in Cutler Bay Florida but continued to display warning lights. The satellite communications system was not able to be repaired. This failure deactivated certain convenience…
Had electrical trouble with your 2018 Nissan Leaf?
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 2018 Nissan Leaf?
It's a meaningful issue. 15 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $850.
At what mileage does the electrical typically fail?
Based on the 15 complaints filed, electrical issues most often appear around 38,784 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/2018/Nissan/Leaf.
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.