I compare a 2021 Tesla Model 3 dual motor long-range to a 2019 with the same trim. I find 25 changes, most of which are improvements, and one body flaw that seems to be occurring on all new 2021 Model 3's.

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*Edit: #21 is the heated steering wheel. After talking with a few Model 3 owners, I believe I got that one wrong. I'm replacing it with a change that I missed: For 2021 the TPS sensors are now BLE (Bluetooth Low Energy), previous model years are rf. You can only get them from Tesla and cost $75 ea.

The 25 changes:
@1:32 #1 New Aero Wheels & Cover
@2:50 #2 Chrome Delete
@3:15 #3 Smaller Frunk
@3:35 #4 Hood Easier To Close
@4:12 #5 Double Pane Glass On Front Windows
@5:23 #6 New Trunk Gasket
@5:53 #7 Automatic Opening & Closing Trunk
@6:30 Trunk Alignment Issue
@7:27 #8 New Headlights
@8:02 #9 Trunk Opens 3” Less Than Before
@8:46 #10 Center Console Redesign
@9:13 #11 Wireless Charging Pads
@9:21 #12 Accent Stitching On Console Trim
@9:38 #13 Armrest Tray No Longer Included
@9:56 #14 USB-C Ports Replace USB-A In Center Console
@10:34 #15 Formatted USB Drive Included & Mounted In Glove Box
@11:27 #16 USB-C Ports replace USB-A In Rear Seating area
@11:35 #17 Metal Scroll Wheel On Steering Wheel
@11:59 #18 Graphite Colored Paint Used On Power Seat Controls
@12:12 #19 Magnetic Sun Visor Clips
@12:32 #20 New Graphic On Door Release Buttons
@12:56 New Black Door Sills (Included in Chrome Delete Change)
@13:12 #21 Heated Steering Wheel (*Edit: I think I'm wrong on this one!)
@13:54 #22 Heat Pump System
@15:25 #23 Improved Battery Cells / More Capacity
@16:25 #24 Increased Range
@17:21 #25 Improved Efficiency