CAN COMMUNICATION CODES – DIAGNOSTIC TIPS AND GUIDELINES This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗2015 Nissan Leaf electrical problems
moderate 16 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Complaints
16
Recalls
0
Avg fix
$850
When does it fail?
Of the 16 electrical complaints filed for the 2015 Nissan Leaf, 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 3 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.
CAN COMMUNICATION – NETWORK DIAGNOSTIC FLOW CHART This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗VEHICLE KEY NOT DETECTED / AUTHENTICATED, ENGINE WILL NOT START This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗12 VOLT BATTERY TESTING FOR IN-SERVICE VEHICLES SERVICE INFORMATION The following Service Information lists NNA procedural recommendations for establishing good connections while performing 12V battery testing. These recommendations are expected to promote uniformity during the connection process, therefore reducing the number of incorrect âTest with DCAâ and âReplaceâ results. HINT: If 12 volt batteries are allowed to discharge for a prolonged period of time, battery life may be drastically reduced. This condition may lead to premature battery replacement and customer dissatisfaction. IMPORTANT: ï· CPX-900 is now an accepted testing tool to use along with or in place of the DSS-500
full bulletin at NHTSA ↗SILICONE-BASED LUBRICANT OR GREASE CAN DAMAGE ELECTRICAL COMPONENTS SERVICE INFORMATION Do not apply Silicone-based lubricants or grease to, or around, any interior electrical components. To avoid the risk of death or severe personal injury, do not directly spray Silicone-based lubricant or grease, or inadvertently overspray Silicone-based lubricant or grease onto any interior electrical components. These types of lubricants can be detrimental to the proper operation of electrical components.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report two distinct brake failure patterns on 2015 Nissan Leafs. First, brake failure tied to a weak or failing 12-volt battery: the vehicle rolls forward or backward despite the brake pedal being pressed, the pedal goes soft with zero stopping power, multiple warning lights appear, and the car only stops using the parking brake or by putting it in Park. Turning the car off and on sometimes temporarily restores braking. Replacing the 12V battery resolves this. Several owners bought the car new or recently and experienced failures within weeks or days of ownership; others encountered it recurring every 5 days.
Second, brake failures occur during normal driving unrelated to the 12V battery state. The brake pedal goes soft, requires extreme pressure, and the vehicle does not stop as expected. The ABS system activates and the car shudders. Multiple warning lights illuminate. Emergency brake and Park are the only reliable ways to stop. One owner was quoted $5,500 to replace the entire intelligent brake unit; another dealer suggested $2,600 for the brake unit plus $2,400 for engine harness replacement. Dealers often cannot reproduce the issue even when owners provide video evidence.
Additional electrical complaints include sudden stalling while driving, uncontrolled acceleration, loss of shifting ability, persistent beeping when shutting down, and intermittent backup camera blanking. Nissan has released firmware updates under safety campaign 16V119000, but owners report these did not resolve failures.
Same Nissan Leaf electrical reports on nearby years: 2012 · 2013 · 2016 · 2018
Failure modes owners describe
Electronic Brake Failure on 12V Battery Low/Failure
When the 12-volt battery weakens or fails, the vehicle loses brake function entirely. The car may roll forward or backward without accelerator input, brakes do not engage when pressed, and multiple warning lights (brake, ABS, battery, traction control) appear on the dash. Turning the car off and on sometimes temporarily restores braking. Replacing the 12V battery resolves the issue.
When: Occurs during or shortly after cold starts, some owners report it happening after about 3 weeks of ownership or recurring every 5 days. One case at 41,000 miles; another at 5,050 miles.
Symptoms owners cite: Vehicle rolls forward or backward despite brake pedal being pressed; Brake pedal feels soft or goes to floor with no stopping power; Multiple dashboard warning lights (brake, ABS, traction control, battery); Car moves without accelerator input; Loud popping or grinding noise when pressing brake pedal hard; Power cycling vehicle may temporarily restore braking
Codes mentioned: T/M SYSTEM MALFUNCTION message
Repairs/costs cited: 12V battery replacement resolves issue temporarily or permanently. One owner reports $2,600+ diagnosis for 'Driven Intelligent Brake Unit' and additional $2,400+ for 'main engine harness' replacement.
Recalls/TSBs owners mention: Nissan told one owner they have no record of the problem despite dozens of complaints. One case noted firmware updates (3NF9B and 4NP3E) applied to Driven Intelligent Brake Unit under safety campaign 16V119000; another owner received firmware update that did not resolve the issue.
Electronic Brake Assist / Intelligent Brake Unit Failure While Driving
During normal driving, the electronic brake assist system fails completely. The brake pedal depresses much farther than normal with little to no stopping power. The ABS system may activate, causing the vehicle to shudder. Emergency brake and putting the car in Park are the only ways to stop. Multiple warning lights illuminate. The issue can recur multiple times and is sometimes reproducible but sporadic.
When: Occurs while driving at various speeds (10 MPH, 20 MPH, during acceleration from stop light). One case documented in October and November 2020; problem recurs in cold weather.
Symptoms owners cite: Brake pedal goes soft or to the floor with minimal braking effect; Extended braking distance; ABS system activates, vehicle shudders; Multiple dashboard warning lights illuminate; Vehicle does not stop with normal braking; Emergency brake required to stop vehicle; Problem may recur multiple times
Codes mentioned: Faults with electronic Driven Intelligent Brake Control Unit, Module short circuit reported in one case
Repairs/costs cited: One owner quoted $5,500 for entire intelligent brake unit replacement. Dealers often cannot reproduce the issue despite owner video evidence.
Recalls/TSBs owners mention: Safety campaign 16V119000 address Driven Intelligent Brake Unit; firmware versions 3NF9B and 4NP3E noted. One owner states newer firmware should be available under safety campaign.
Intermittent Electrical Loss of Vehicle Control / Stalling
Vehicle suddenly loses motive power while driving, stalls without warning, or loses ability to shift into certain gears. One owner reports uncontrolled acceleration followed by total power loss. Another reports battery warning light and loss of power at 10 MPH. Vehicle behavior includes inability to shift out of Park or into Reverse/Drive after electrical event.
When: Occurs while driving at various speeds (10-70 MPH). One case at 31,000 miles with full updates/services; another at 5,050 miles.
Symptoms owners cite: Loss of motive power while driving; Sudden stalling without warning; Vehicle unable to shift into Neutral, Reverse, or Drive after failure; Battery warning light illuminates; Uncontrolled acceleration followed by power loss; Vehicle requires towing
Codes mentioned: Battery warning light
Repairs/costs cited: Dealers unable to diagnose in some cases. One owner notes firmware update was suggested but did not resolve issue.
Recalls/TSBs owners mention: Manufacturer was notified in at least one case but no response beyond note-taking.
Persistent Beeping and Warning Light Anomalies
Vehicle emits long uninterrupted beeping that continues for minutes when turning off the car. Warning lights on dashboard light up sporadically without clear cause. One owner also reports window function loss.
When: Occurs after turning off the car; one owner reports it happened within 2 months of ownership.
Symptoms owners cite: Long uninterrupted beeping when turning off vehicle; Beeping continues for minutes; Sporadic dashboard warning lights; Driver window malfunction
Backup Camera Failure
Backup camera display shows blank black screen intermittently. Issue resolves on its own after several hours without requiring any service action.
When: Intermittent failures; resolves within several hours.
Symptoms owners cite: Backup camera shows blank black screen; Screen does not respond to shifting in and out of reverse
Synthesized from 16 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
I was driving down the road and applied pressure to the brakes. The brakes did not respond and the dash lights lit up indicating several failures. It took 15-20 feet before I was able to completely stop. If this had happened on a busy street or freeway, the results would have been catastrophic. The vehicle is currently located a Nissan dealership and is available for inspection.
Electronic brake assist failed while driving in traffic, october 9th, 2020. Braking distance was extended and the brake pedal depressed much farther than normal, causing driver to stop car with emergency brake. Emergency lights illuminated on the dash. Errors codes indicate faults with the electronic driven intelligent brake control unit, the subject of safety campaign 16v119000. Subsequent…
Had electrical trouble with your 2015 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 2015 Nissan Leaf?
It's a documented issue but not catastrophic. 16 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 16 complaints filed, electrical issues most often appear around 27,721 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/2015/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.