On certain Model S and Model X vehicles, the battery powered Pyrotechnic High Voltage (HV) Battery Disconnect will reach the end of its battery lifespan in the near future, which will trigger alerts and may limit the vehicle’s performance.
full bulletin at NHTSA ↗2014 Tesla Model S electrical problems
critical 118 complaints filed with NHTSA · avg repair $850 · see electrical across all vehicles →
Failure mileage
Complaints
118
Recalls
0
Avg fix
$850
2crashes
5fires
2injuries
2fatalities
When does it fail?
Of the 118 electrical complaints filed for the 2014 Tesla Model S, 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 33% of every owner complaint on file for this vehicle — the dominant problem area across 11 categories tracked.
Owners have filed 118 electrical complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
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.
Some customers in Europe have vehicles with one charger, which limits the vehicle?s charging rate to 16 A when the vehicle is connected to a charging station capable of supplying more than 16 A single phase. The vehicle?s 3-phase charging capability is unaffected.
full bulletin at NHTSA ↗Tesla is committed to continuous improvement of the security of its products and advises customers to always install the latest mobile app and vehicle software releases to remain as secure as possible. On approximately May 1, 2020, the Tesla connectivity network is undergoing enhancements for increased security, reliability, and scalability. In order for vehicles to maintain compatibility with and access to features requiring Tesla network connectivity (such as receiving future over-the-air software updates, accessing the mobile app and associated features, utilizing voice commands, receiving streaming media content, etc.), vehicles must be running software version 2019.40.2.3 or newer.
full bulletin at NHTSA ↗The Tire Pressure Monitoring System (TPMS) ECU has a built-in antenna that receives signals from the TPMS sensors. Earlier versions of the TPMS ECU were equipped with an antenna that might not receive reliable readings from the front sensors, causing the TPMS indicator light to be displayed inaccurately, even when the tires are properly inflated.
full bulletin at NHTSA ↗It is possible to accidentally break off the aeroshield support tab from the HV Battery. If the tab breaks, the mid aeroshield is not fully supported, reducing the aerodynamic efficiency of the vehicle. The operation of the HV Battery is not affected.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2014 Tesla Model S electrical failures cluster heavily around the Media Control Unit (MCU), a touchscreen that governs infotainment, climate, lighting, rear-camera display, turn signals, and charging functions. Owners report the MCU blacks out, freezes, reboots unexpectedly—sometimes mid-drive—leaving critical vehicle systems inoperable. The root cause cited repeatedly is premature failure of the embedded eMMC flash memory chip soldered to the MCU circuit board. Tesla's software writes excessive debug data to this storage, exceeding its read-write cycle limits; once exhausted, the chip fails permanently and the entire MCU must be replaced since the memory chip is not serviceable.
When the MCU fails, owners lose turn-signal operation (audible and visual), rear-camera display, HVAC and defrost controls, manual headlight control, suspension adjustment, steering-mode selection, seat heaters, sunroof operation, and app connectivity. Some owners report the vehicle takes 30 seconds to several minutes to exit Park while subsystems reboot. Loss of climate control during supercharging can trigger thermal shutdown. Out-of-warranty replacement costs quoted range from $1,500 to $3,500. Tesla has offered an extended warranty to 100,000 miles for the eMMC but refuses coverage above that threshold, even if symptoms began beforehand. A voluntary eMMC replacement sometimes triggers subsequent MCU failure. Firmware updates and factory resets provide temporary relief but problems recur within days or weeks. One owner paid $2,500 for an MCU2 upgrade only to experience crashes within 10 days.
Same Tesla Model S electrical reports on nearby years: 2012 · 2013
Failure modes owners describe
MCU (Media Control Unit) eMMC Flash Memory Failure
The embedded eMMC flash memory chip soldered to the MCU circuit board fails prematurely due to excessive write cycles from Tesla's debug logging. Once failure occurs, the MCU blacks out, reboots unexpectedly, or freezes—sometimes while driving. The chip cannot be replaced independently; the entire MCU assembly must be replaced at high cost.
When: Typically 5–7 years of ownership; one narrative reports failure at 50k miles, others at 100k–191k miles. Symptoms often begin with random reboots before total failure.
Symptoms owners cite: Center touchscreen goes black or fails to power on; Screen freezes or becomes unresponsive to touch; Unexpected reboots while driving (Tesla logo appears during reboot); Slow boot sequence or prolonged 'systems powering up' message; Rear camera display inoperable; Turn signals (audible and visual) non-functional; HVAC, defrost, and climate controls unavailable; Headlights cannot be controlled manually; Seat heaters and steering wheel heaters unavailable; Sunroof controls unresponsive; Loss of app connectivity to vehicle; Vehicle cannot charge or charges at severely reduced rates; Vehicle takes 30 seconds to several minutes to exit Park; Instrument cluster may also reboot or display frozen information
Codes mentioned: NHTSA Recall 21V-035 (MCU/eMMC failure)
Repairs/costs cited: Complete MCU replacement required. Out-of-warranty replacement costs reported: $1,500–$3,500. Tesla has offered extended warranty coverage to 100,000 miles for eMMC failures, but refuses coverage above that threshold regardless of when symptoms began. Some owners report paying $2,500 for MCU2 upgrade without resolving issues. Refurbished units are sometimes installed. One owner reports being charged ~$1,868 out of warranty.
Recalls/TSBs owners mention: Tesla initially offered factory resets and firmware updates as temporary fixes, which provide relief for days or weeks before problems recur. Tesla claimed reduced data logging in later software updates to preserve eMMC life. Extended warranty offered to 100k miles for eMMC issues only (not other MCU failures). Tesla's recall 21V-035 marks many vehicles as 'complete' without providing proof of repair; NHTSA data shows some vehicles with recall 'Incomplete' status. Some owners report Tesla refused recall repairs citing salvage-vehicle policies or missing pre-condition inspections. One narrative cites Elon Musk acknowledgment (Twitter, Oct 12, 2019) of excess debug logging.
MCU Display Glass Adhesive Failure (Instrument Cluster Bubbling)
The adhesive bonding the display glass to the instrument cluster backing separates, causing bubbling, blurring, or water-mark-like impressions that obscure critical information. The defect is cosmetic but functional, as it can render the speedometer unreadable.
When: Reported at 6 years of age; timing within ownership not specified in most narratives.
Symptoms owners cite: Instrument cluster display glass separates or bubbles; Blurring or distortion of cluster information; Speedometer display becomes obscured or unreadable; Water-mark-like impressions visible behind glass
Repairs/costs cited: Tesla charges approximately $1,500–$1,600 to replace the entire instrument cluster with an updated unit featuring improved adhesive. Owners are responsible for out-of-pocket cost; no warranty coverage mentioned.
Recalls/TSBs owners mention: Tesla is aware of the defect and charges customers for replacement with an updated design.
Tire Pressure Monitoring System (TPMS) Sensor Failure
Original TPMS sensors fail prematurely and are deemed a known design defect. Tesla refuses to replace failed sensors under warranty and only offers replacement with an 'upgraded' version at owner expense.
When: Original sensors fail; one narrative mentions TPMS issue as 'known' but specific mileage/timing not detailed.
Symptoms owners cite: TPMS sensors fail to function; No tire-pressure warnings or readings
Repairs/costs cited: Tesla charges approximately $1,000 for replacement with upgraded TPMS sensors. One owner reports finding non-Tesla repair facilities offering lower cost. Tesla warranty does not cover original sensor failures.
Recalls/TSBs owners mention: Tesla acknowledges the original design as defective but refuses warranty coverage. Offers only a paid upgrade to improved sensors. Some owners bypass Tesla and use third-party repair facilities.
Door Handle Extension Mechanism Failure
The motorized door-handle extension mechanism fails, preventing the handle from extending to open the door. All four handles may fail over the vehicle's life.
When: Some failures at new; recurrence at ~62,000 miles reported. Mentioned as recurring issue with replacements warranted for 1 year only.
Symptoms owners cite: Door handle fails to extend when button or sensor is activated; Door cannot be opened from outside without manual intervention
Repairs/costs cited: One owner reports all four door handles replaced when car was new; driver's handle replaced again at 62k miles. Warranty covers 1 year per Tesla policy, not lifetime design flaws.
Recalls/TSBs owners mention: Tesla has replaced failing door handles under warranty for some owners early in vehicle life, but applies only 1-year warranty to replacement parts. One narrative notes this is a 'known issue' in design.
Software Update–Induced Battery Range Loss and Charging Speed Reduction
Tesla software updates (2019.16.1 and 2019.16.2 cited) cause sudden loss of driving range (~26 miles) and severely reduce Supercharging speed without prior owner notification. Subsequent updates fail to restore lost range or charging speed.
When: May 2019 update cited; range loss discovered immediately post-update.
Symptoms owners cite: Sudden loss of ~26 miles EPA range; Dramatically reduced Supercharger output/charging speed; No advance notice or changelog disclosing these changes
Repairs/costs cited: No repair specified; issue remains unresolved per compliant narrative. One complaint filed by legal counsel representing a class action (U.S. District Court, Northern District of CA, Case No. 5:19-CV-01422-VKD).
Recalls/TSBs owners mention: Tesla issued subsequent updates allegedly intended to correct the problem but the compliant states 'there is no significant change or increase in range or charging for the vehicle to date.' Tesla provided no explanation for the range loss or charging-speed changes.
High-Voltage Battery Contactor and Onboard Charger Premature Failure
High-voltage contactors and onboard charger assemblies fail prematurely at very low mileage (50,367 miles reported), rendering the vehicle unable to charge and unable to be towed easily. Charge port does not open.
When: At 50,367 miles on a 2014 Model S.
Symptoms owners cite: Vehicle will not charge; Charge port will not open; Vehicle will not turn on (complete loss of HV power); Vehicle becomes immobile and requires towing
Codes mentioned: High-voltage battery contactor failure, Onboard charger assembly failure, HV circuit integrity failure
Repairs/costs cited: Tesla quoted nearly $4,000 for repair of contactor, charger assembly, and HV circuit diagnostics. Owner reports being unable to afford repair on fixed Social Security income.
Recalls/TSBs owners mention: Tesla refused goodwill assistance despite acknowledging these are 'known early Model S issues' and that the components have been redesigned in later models. No warranty coverage applied.
High-Voltage System Failure and Harness Replacement Complications
After a high-voltage junction-box repair by Tesla, the vehicle shut down 15 miles after leaving the service center. Tesla replaced the HV harness at no cost but provided no explanation. Post-repair, new sensor-proximity alerts began triggering that were not present before the work.
When: Post-service shutdown; timing not specified.
Symptoms owners cite: Vehicle shut down unexpectedly 15 miles after service; New proximity/sensor alerts triggering after HV work (not present before); Owner unable to obtain written confirmation of safety after HV repair
Repairs/costs cited: HV harness replaced at no charge; no other repair noted. Tesla refused further diagnostic procedures requested by owner.
Recalls/TSBs owners mention: Tesla replaced HV harness at no cost but declined to provide written safety confirmation or perform additional diagnostics (e.g., bench-testing sensors). Owner expressed concern about unresolved HV/wiring issues.
HVAC Louver Failure and Thermal Throttling During Charging
Front HVAC louvers (air-direction flaps) fail or malfunction repeatedly. During supercharging, if louvers are not functioning properly, the vehicle cannot dissipate heat adequately and will shut down charging or reduce power to protect the battery. Tesla service states there is no dedicated error code for this failure and refuses to address it.
When: Multiple service visits for louver repair; thermal throttling occurs during supercharging.
Symptoms owners cite: Front HVAC louvers fail to position correctly; Vehicle overheats during supercharging if louvers malfunction; Vehicle reduces propulsion power and owner must pull over to allow cooling; Defrost/heating performance degraded
Repairs/costs cited: Louvers serviced four times per owner report; Tesla claims no diagnostic code exists for this failure, so they refuse further service.
Recalls/TSBs owners mention: Tesla service center states the problem has no dedicated error code and therefore they cannot address it. Recommends owner continue driving despite repeated failures.
Universal Mobile Charger Overheating
The universal mobile charger (wall connector) overheats during use, creating fire risk. A 2013 garage fire in Irvine, California was attributed to a Tesla mobile charger by Orange County Fire Investigators. Subsequent recalls were deemed insufficient; overheating continues to be reported.
When: Reports span from 2013 onwards; ongoing as of complaint date.
Symptoms owners cite: Mobile charger overheats during normal operation; Potential fire ignition risk
Repairs/costs cited: Tesla issued a recall but was described as 'a fiasco and insufficient.' Owners report the charger remains a fire hazard.
Recalls/TSBs owners mention: Tesla issued a recall for the universal mobile charger, but the compliant states Tesla 'dragged its feet' and 'played blame games' before issuing it. The recall was deemed insufficient and overheating problems persist.
Battery Management Software Update — Unexpected Charge Limit and Loss-of-Capacity Alerts
Following software updates, the vehicle's battery management system reduces charge limits or alerts the driver to sudden loss of battery capacity without clear explanation. One narrative reports a battery suddenly lost charge overnight despite showing 'fully charged,' triggering alerts to 'immediately pull over.'
When: Post-software update; one instance after battery showed fully charged state.
Symptoms owners cite: Sudden loss of battery capacity without apparent cause; Charge limited to 21% or lower without clear explanation; Repeated alerts to 'immediately pull over and stop driving'; Mileage range reduction displayed on vehicle; Battery must be replaced per Tesla diagnostics after software correction
Repairs/costs cited: One owner reports Tesla, after downloading a software update that cleared an initial error, then messaged that the high-voltage battery must be replaced.
Recalls/TSBs owners mention: Tesla's software updates apply charge limits and report capacity loss, but do not always provide transparent explanation. Subsequent updates may clear error codes but confirm hardware replacement is needed.
Supercharger Billing Fraud / VIN Cloning and Access Denial
The Tesla Supercharger billing and authentication system records charging sessions in locations where the vehicle was not present (e.g., California sessions for an Alabama vehicle). Tesla customer support acknowledges the issue involves possible VIN cloning or a system flaw. When owners block credit cards to prevent fraudulent charges, Tesla's system automatically disables Supercharger access due to unpaid balances, even though the charges are fraudulent.
When: Recurring over several months; one 2014 Model S reported.
Symptoms owners cite: Supercharger billing records sessions in different geographic location than vehicle location; Account flagged with unpaid fraudulent balances; Vehicle Supercharger access disabled by Tesla; Customer support unable or unwilling to permanently resolve issue
Repairs/costs cited: No repair; issue requires repeated calls to customer support to restore access temporarily.
Recalls/TSBs owners mention: Tesla customer support acknowledges VIN cloning or system flaw; however, resolution requires repeated manual intervention by owner and is not permanent.
Synthesized from 118 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 7 most recent
The instrument control screen is failing as the glass is separating from the glass and unable to view icons on the panel. Telsa is not going to replace unless 1500 is paid for replacement with updated screen that does not separate from the glass. Some people are reporting it as bubbling or impression of water marks behind the glass but it is the glue failing. This is a known issue. For the…
The contact owns a 2014 Tesla Model S. The contact noticed that there was acid leaking from the vehicle onto the contact’s foot causing the foot to burn. The vehicle was taken to the dealer where it was diagnosed that the screen seal failed which cause the screen to leak and both screens needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The…
Door handle extension. The car has experienced multiple door handle defects, wherein the handle will not extend to open the door. Without extension the door cannot be opened. This issue happened when the car was new and all four handles were replaced, and again at 62,000 miles, when the driver's door malfunctioned. This is a significant safety issue, as it is impossible to open the door to…
I am the current owner of a 2014 Tesla Model S equipped with MCU1. While driving, including at freeway speeds, the center touchscreen has rebooted unexpectedly, showing only the Tesla logo before recovering. During these reboots, critical vehicle functions are unavailable, including the rearview camera, HVAC/defrost controls, and other essential features. This failure matches the exact safety…
Instrument display is frozen at 0mph at 7:57am even while driving. Uploaded photo was taken at 9:19am as indicated on time stamp and on larger display at center of vehicle.
After updating vehicle to software version 11.0 (2022.8.10.6 d2b84545e244) my center screen which controls the majority of my functionality and safety features including my backup camera AND my instrument cluster will intermittently go blank. This prevents me from being able to use my backup camera, see warnings about the car, as well as be able to tell how fast my car is going. In addition, my…
My [XXX] mother owns a 2014 Tesla Model S P85+ (VIN: [XXX] ) with only 50,367 miles. The vehicle suddenly became completely inoperable without warning. It would not turn on, would not charge, and the charge port would not open. The vehicle had to be towed. Tesla diagnosed failures of the high-voltage battery contactors, the onboard charger assembly, and HV circuit integrity. These are essential…
Had electrical trouble with your 2014 Tesla Model S?
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 Tesla Model S?
It's a serious issue. 118 complaints have been filed, including 2 reports involving a crash and 2 fatality(ies). We've classified it as critical based on NHTSA's reported outcomes.
At what mileage does the electrical typically fail?
Across the 78 complaints that reported odometer mileage, most electrical failures cluster between 54,000 and 95,000 miles, with the median around 65,000. A quarter of owners report trouble before 54,000; a quarter make it past 95,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
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/Tesla/Model S.
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.