What are the main differences between Tesla Hardware 4 and Hardware 3, and how do you identify your version?

Tesla’s Hardware (HW) versions represent the evolution of its Autopilot and Full Self-Driving (FSD) capabilities, with each iteration offering significant improvements in performance and safety. If you’re wondering whether your Tesla is equipped with Hardware 3 (HW3) or the latest Hardware 4 (HW4), here’s a clear guide to help you figure it out.

Key Differences Between HW4 and HW3

1. Camera Improvements

• HW4: Features higher-resolution cameras with better low-light performance, wider fields of view, and improved durability. It also adds a new set of forward-facing cameras and, in some cases, additional side or rear cameras.
• HW3: Equipped with lower-resolution cameras compared to HW4 and lacks the additional cameras introduced in HW4.

2. Computing Power

Tesla HW3 vs. HW4: Technical Specifications Comparison

• HW4: Tesla upgraded the onboard computer, delivering significantly more processing power than HW3. This improvement allows HW4 to handle more complex computations for Full Self-Driving (FSD) and enhanced object detection.
• HW3: While still capable of FSD Beta and advanced driver-assist features, it doesn’t have the same computational headroom for future software enhancements.

3. Radar

• HW4: Includes the option for high-definition radar (also known as "Phoenix radar"), enhancing detection of objects in adverse conditions like rain, fog, or snow.
• HW3: Tesla phased out radar in 2021 for HW3, relying solely on the vision-based Tesla Vision system.

4. Availability

• HW4: First introduced in 2023 for the refreshed Model S and Model X. It’s now also included in new Model 3 and Model Y vehicles produced after mid-2023, depending on the region.
• HW3: Standard on all Teslas manufactured between 2019 and early 2023.

How to Determine Your Tesla’s Hardware Version?

1. Check the Build Year and Model

• HW4: If your Tesla was manufactured in 2023 or later and is a refreshed Model S, Model X, or a new Model 3/Y, it’s likely equipped with HW4.
• HW3: Found in vehicles manufactured between 2019 and early 2023.

2. Inspect the Camera Setup

• Look closely at the cameras around your Tesla:

• HW4: Cameras may appear larger or slightly different in shape, with additional forward-facing units. Some vehicles may have an extra set of cameras near the headlights or sides.
• HW3: Fewer cameras, typically smaller and uniform in design.

Here is a comparison image to help you identify the differences:

HW4 (top) and HW3 (bottom) repeater cameras

3. Use Tesla Service Mode

Tesla provides a service mode for advanced diagnostics:

• Go to Controls > Software > Additional Vehicle Information.
• This screen will display your hardware version under the "Autopilot Computer" or "Full Self-Driving Computer" section.

4. Contact Tesla Support

If you're unsure, contact Tesla Support or schedule a service appointment. The team can confirm your hardware version based on your VIN and other vehicle details.

Should You Upgrade to HW4?

If you’re considering an upgrade:

• Current FSD Performance: HW3 is still capable of running Tesla’s FSD Beta program and supports most Autopilot features. If you’re satisfied with current performance, there’s no urgent need to upgrade.
• Future-Proofing: HW4 offers improved capabilities and a stronger foundation for future Tesla Vision updates and FSD advancements.

Final Thoughts

Understanding your Tesla’s hardware version is crucial for knowing the capabilities and limitations of your vehicle. Whether you’re using HW3 or HW4, Tesla’s continuous over-the-air updates ensure that your car stays ahead of the curve. If you’re considering an upgrade, weigh the benefits of enhanced camera quality and processing power against your current driving needs.

Pro Tip for Tesla Owners: Whether you’re rocking HW3 or the latest HW4, protecting those side repeater cameras is essential. Over time, UV rays and rain can cause the factory finish to peel or discolor. We’ve designed a Carbon Fiber Side Camera Cover that specifically solves this. Using an exact 1:1 original factory mold, it provides a seamless, glove-like fit that won’t interfere with your Autopilot sensors. It’s the easiest way to prevent paint damage while giving your Tesla that high-end, custom look. 

Before: No protection, severe paint damage, the vehicle looked unsightly, depreciated in value, and the camera functionality was affected.

After: The carbon fiber protective cover protects the camera, upgrades the vehicle's appearance, increases its resale value, and does not affect the camera's functionality.

HW4.0 Camera Version covers

HW3.0 Camera Version covers

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