HW3
- Three identical dark lenses
- Earlier housing and layout
- No red / magenta coating
Exterior identification
Spot HW4 from the outside
No VIN? Use the cameras as a filter. Look under good light or at an angle — the red reflection is the fastest clue. Lighting still lies. Confirm on the software screen before you pay.
1 · Front windshield cluster
HW4 / AI4
- Two red-tinted lenses, often a dummy third
- Revised housing
- Red reflection is a clue, not a verdict
Photograph this angle through the windshield in daylight or with a flashlight at an angle.
2 · Side repeater cameras
HW3
- Black / clear lens
- Wider, longer turn-signal LED strip
- Easiest tell in person
HW4 / AI4
- Red-tinted lens
- Narrower, thinner LED strip
- Check both fenders plus the windshield
Photograph the B-pillar repeater under good light. Red reflection is the fastest lot clue — still confirm on software.
Confirm on the software screen →
Listing photos are only a screen. Phone processing can invent or hide a red reflection. Walk the car, then open Software.
Quick reference
| Feature | HW3 | HW4 |
|---|---|---|
| Front layout | Earlier housing | Revised housing |
| Front lens | Black / dark | Red tint |
| Repeater lens | Black / dark | Red tint |
| Turn signal | Wider LED strip | Narrower LED strip |
| Suite | 1.2 MP | 5 MP |
Last updated 5 September 2026. Confirm hardware and Supercharging on the car before you buy. Hardoptic is not affiliated with or endorsed by Tesla. The software screen on the car always wins.