2010 TESLA ROADSTER

Typical onset: 40,000-80,000 mi

Symptoms: Complete loss of drive power with warning lights, Reduced power mode or limp-home operation, Clicking or relay cycling sounds from rear compartment, Charge port won't communicate with charger

Fix: PEM/inverter assembly is behind the seats and requires 8-12 hours to remove and reinstall. Tesla no longer supports these units officially, so you're looking at third-party rebuilds or used units from salvage. Some independents can rebuild individual boards. Figure 10-14 hours total with diagnostics.

Estimated cost: $8,000-15,000

Typical onset: 30,000-60,000 mi

Symptoms: Grinding or whining noise from rear during acceleration, Metal shavings in transaxle fluid, Sudden loss of drive with motor still running, Clunking when transitioning from regen to power

Fix: The BorgWarner single-speed unit has a known weak point in the helical gears and bearings. Requires complete transaxle removal (motor stays in), which means dropping the entire rear subframe. 16-20 hours labor, and you'll need a rebuilt unit since new ones don't exist. Some shops open and rebuild with upgraded bearings, adding time.

Estimated cost: $7,000-12,000

Typical onset: 60,000-100,000 mi

Symptoms: Significantly reduced range (under 150 miles from original 244), Brick warnings or individual cell group failures, Longer charge times or failure to reach full charge, Car won't wake from sleep or enter ready mode

Fix: The 6,831-cell lithium-ion pack degrades over time, especially if stored at full charge or in hot climates. Individual module replacement is possible (11 battery sheets total), but requires pack removal and 20+ hours labor. Some cells are no longer available new. Cell balancing and BMS resets can extend life temporarily (4-6 hours diagnostic time).

Estimated cost: $5,000-20,000

Symptoms: Car completely unresponsive, no dash lights or unlock function, Touchscreen won't boot or shows error codes, High-voltage contactors won't close, Charge port physically locked shut

Fix: The 12V battery powers all control systems and contactors. When it dies, the car is bricked even if the main pack is full. Located in the front trunk, replacement is straightforward (1 hour), but the car uses a specific absorbed glass mat battery. Many owners don't realize this needs replacement every 3-4 years. Jump-starting from the front tow-hook charge point can revive it temporarily.

Estimated cost: $400-700

Symptoms: Charge port door won't unlock or open, No charging despite plug connection and green light, Adapter overheating or melted pins, Intermittent charging requiring cable wiggling

Fix: The motorized charge port door mechanism fails from corrosion or wear. Port itself can develop high-resistance connections causing heat buildup. Door actuator replacement takes 3-4 hours (behind bodywork). Port replacement or pin refurbishment is another 4-6 hours. Original UMC units are obsolete; you'll need aftermarket solutions or Tesla's current-gen adapter with custom wiring.

Estimated cost: $800-2,500

Typical onset: 50,000-90,000 mi

Symptoms: No heat or weak cabin heating performance, A/C compressor seized or making loud squealing noise, Coolant leaks from front HVAC box area, Excessive range loss when climate control is running

Fix: The PTC heater elements fail or the resistive heater core leaks coolant (this car uses a traditional coolant loop for the motor). A/C compressor is electric but uses Lotus-era components. Heater core requires dash removal (12-16 hours). Compressor is 6-8 hours and requires EPA-compliant refrigerant recovery. Parts are mix of Lotus and Tesla-specific.

Estimated cost: $2,000-4,500

Symptoms: Touchscreen freezes or shows corrupted graphics, Phantom error codes that clear after reset, Range calculations wildly inaccurate, Climate control or charge settings don't save

Fix: Early Tesla software is buggy and no longer supported with updates. Hard resets (holding screen buttons) often fix temporary issues (0.5 hours). Persistent problems may require VCM reflash or replacement if internal storage has failed. Very few shops have the proprietary diagnostic tools for these early cars. Budget 2-4 hours for diagnosis with specialized equipment.

Estimated cost: $500-2,000