2015 TESLA MODEL S

85 kWh Dual Motor AWDAWDAUTOMATICev
5-Year Cost of Ownership
$27,275 maintenance + known platform issues
~$5,455/yr · 450¢/mile equivalent · $15,494 maintenance + $11,081 expected platform issues
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Common Problems & Known Issues

The 2015 Model S is Tesla's first-generation long-range EV with proven battery longevity but notorious drive unit failures and some fit-and-finish issues. Early adopters see drivetrain rebuilds more often than battery problems.

Drive Unit (Motor/Transmission) Failure - Rear Unit on RWD, Front or Rear on AWD

Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Whining, humming, or clicking from motor area during acceleration or regen, Milling noise at highway speeds, Drivetrain error messages on dash, Reduced power or limp mode, Leaking drive unit fluid (red/orange color)
Fix: Tesla historically replaced entire drive units under warranty; out-of-warranty requires R&R and either Tesla reman unit or third-party rebuild. 8-12 labor hours for single motor, 10-14 for dual. Some owners on second or third drive unit by 100k miles. Tesla extended drive unit warranty to 8yr/unlimited miles for early cars, check if yours qualifies.
Estimated cost: $5,000-15,000

Main Battery Pack Degradation and Contactors

Occasional · medium severity
Typical onset: 100,000-150,000 mi
Symptoms: Range loss beyond expected 10-15% (seeing 20-30% loss), Charge rate limited to low speeds at Superchargers, Contactors failing to close - car won't start or go into drive, High voltage isolation faults
Fix: Battery degradation is gradual and mostly acceptable, but contactor failures require pack removal and internal repair. Individual module failures rare but catastrophic. Pack R&R is 12-16 hours. Tesla does not sell modules separately; used/salvage modules or full pack replacement required. Original 85kWh packs holding up better than expected overall.
Estimated cost: $3,000-8,000 for contactors; $15,000-25,000 for pack replacement

MCU (Media Control Unit) Touchscreen Failure - Tegra 3 Chip

Common · medium severity
Symptoms: Yellow border around touchscreen, Screen freezing, rebooting constantly, or going black, Slow response or ghosting, Backup camera failure, Loss of touchscreen functions including climate control access
Fix: The Tegra 3 chip in MCU1 fails from memory wear (eMMC). Tesla offered paid upgrade to MCU2 (Infotainment Upgrade, ~$2,500). Third-party shops can replace eMMC chip for less. Screen itself can also delaminate. 2-4 hours labor for MCU replacement. This is not a safety issue but severely impacts usability.
Estimated cost: $500-1,500 for eMMC repair; $1,500-2,500 for MCU upgrade

Door Handle Mechanism Failure

Common · low severity
Typical onset: 40,000-80,000 mi
Symptoms: Handles fail to auto-present when approaching car, Handles stick in or out, Manual emergency release cable breaks, Frozen handles in cold weather
Fix: Early handles used gears and micro-switches prone to stripping and failure. Tesla revised design multiple times. Handle assembly replacement required, no rebuild option. 1-2 hours per handle. Tesla extended warranty covered many, but most 2015s now out of coverage. Keep emergency release functional.
Estimated cost: $400-700 per handle

12V Battery Failure and Power Conversion Issues

Common · medium severity
Symptoms: Car won't wake up or unlock, Random error messages on dash, Accessories failing (windows, locks, displays), Clicking from frunk area, Main battery full but car dead
Fix: The DC-DC converter charges a conventional 12V lead-acid battery that powers all accessories and contactors. 12V battery typically lasts 3-5 years. When it fails, car is completely dead despite full main battery. Easy 0.5-hour replacement, but Tesla-specific battery recommended. DC-DC converter failure less common but requires 4-6 hours to replace.
Estimated cost: $200-400 for 12V battery; $1,500-2,500 for DC-DC converter

Suspension Upper Control Arms and Bushings

Occasional · low severity
Typical onset: 70,000-120,000 mi
Symptoms: Clunking over bumps from front end, Wandering steering or poor alignment retention, Inner tire wear, Visible ball joint or bushing deterioration
Fix: Air suspension cars see earlier failures than coil. Upper control arms develop play in ball joints and bushings. Front arms 2-3 hours each side, rears 2-4 hours. Alignment required after. Not Tesla-specific but accelerated by curb weight (4,600+ lbs). OEM Tesla parts recommended due to load requirements.
Estimated cost: $800-1,500 per axle including alignment

AC Evaporator and Cooling System Leaks

Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Loss of AC cooling, Moisture or condensation inside cabin, Fogging on windshield that won't clear, Coolant smell in cabin, High voltage system overheating warnings
Fix: Evaporator core can leak refrigerant or coolant. Dash removal required, 10-14 hours labor. Tesla uses separate coolant loops for battery, motor, and cabin HVAC. Hose connections and quick-disconnects also prone to seepage. Inverter coolant service often neglected, leading to overheating and reduced performance.
Estimated cost: $2,000-4,000 for evaporator; $300-600 for hose repairs
Owner tips
  • Check drive unit fluid every 12,500 miles - red/orange fluid is normal, metal shavings are not. Fluid changes not officially required but recommended every 50k mi.
  • Keep 12V battery fresh (replace every 4 years) to avoid being stranded with full main battery.
  • Monitor MCU screen for yellow banding - get eMMC fixed before total failure locks you out of climate controls.
  • Verify remaining drive unit warranty coverage before purchase - some 2015s still covered to 2023 under extended 8yr/unlimited program.
  • Budget for door handle replacements - all four will likely need service at some point.
  • Use Tesla's service history lookup with VIN to see what's been replaced under warranty.
Buy one if major components (drive units, MCU) already replaced and you can DIY or have independent EV shop access - otherwise warranty expiration makes repair costs a gamble.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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