I have no regrets in paying advance for maintenance even though it's not needed now.
It's just like a waste of time to go for a dental check or medical examination and "nothing" was done because there's no problem but I have no regrets.
I have been faithfully doing annual maintenance since buying a Tesla since 2012.
Initially, they did a lot more than what listed on the maintenance list.
They did many service bulletins (not just mandatory recalls).
During the inspection, they spotted signs of overheated Mobile connector points and they replaced it. It was working fine and I wouldn't know if I skipped the inspection.
In another year, during the inspection, they spotted the beginning of what known as "bubbles" and they replaced the whole MCU computer and the 17" display. If I skipped the inspection, I would have to wait until I discovered the bubbles myself and come back later.
Now, they have done much less as my last year Model X at 12,500 mile inspection only had the following:
- Corrections: Adjust 2nd Row LH Fold-Flat Seat Recliner Cable, 1st Generation Seats
- Pulled logs and checked for active faults: No Active faults
- Checked firmware version: Updated to latest version
- Performed function check of closures (moving glass, doors, trunks): Cleaned and lubricated latches. Good, no issue
- Tested and inspected charging with shop's cable.
- Replaced: Wiper Blades Key Fob Battery Cabin Air Filter
- Remote Keyless Entry: Good, no issue
- Seat belts and latches: Good, no issue
- Interior/exterior lighting and horn: Good, no issue
- Performed inspection of powertrain and chassis components: Good, no issues.
- Checked fluid levels: Topped off washer fluid. Brake and coolant levels optimal. No signs of leakage
- Inspected tires and rotated as necessary
- Measured tire tread depth at:
(Outer) (Center) (Inner) LF: 6 7 7 RF: 7 7 6 LR: 7 7 7 RR: 7 7 5
- Adjusted tire pressures to B-pillar spec: 42psi Front, 42psi Rear
- Measured brake pad thickness (mm)
LF: RF: LR: RR: Park: 7 7 7 7 5
- Performed 4-wheel alignment
- Test drive: Vehicle functions as designed
-LITHIUM COIN,3V,560mAh,23MM (1061712- 00-A) x2
-Corrections: Audio System - Speakers Subwoofer Amplifier General Diagnosis Sub-woofer was function tested and resulted in improper fitment of panel. Adjusted panel and function tested once again and confirmed rattle no longer present.
-Corrections: HV Battery Enclosure General Diagnosis Inspected charge limit-tested and vehicle charged to 99%
In my case, it has been well worth the money since 2012.