How to Replace the Back Cover on the Apple Watch Ultra (DIY Repair Guide)

Does your Apple Watch Ultra (model numbers A2684, A2622, and A2859) have a cracked rear glass? Do you experience unreliable heart rate monitoring, see dust accumulating around the edges, or moisture spots inside the watch? If you’re experiencing any of these symptoms, it’s time to replace the back cover.

In this DIY repair guide, we show you how to replace the back cover on the Apple Watch Ultra with new OEM spares without technical skills or expertise. You will find all the tools required for this repair and original replacement parts below.

Want to get your Apple Watch Ultra repaired by a professional? Send us the smartwatch, and our repair ninjas will restore it to peak working condition. Follow the link, select all the issues that you’re experiencing, and click See Estimated Total to view the total repair cost instantly.

Repair Difficulty

Moderate / Requires 20-30 minutes to complete.

This repair requires carefully removing the worn-out back cover without damaging the delicate ribbon cable and handling a heat gun. You don’t need prior experience or technical skills to complete the repair. With a bit of patience and attention to detail, you can replace the back cover on the Apple Watch Ultra yourself.

Replacement Parts You’ll Need

Restore the form and functionality of your Apple Watch Ultra with original replacement parts. Select the OEM spares from the drop-down menu below and bring your device back to peak working condition.

• Apple Watch Ultra 1st 49MM (LTE) Repair Replacement Spare (Titanium) - Parts

Get an OEM replacement back cover for your Apple Watch Ultra smartwatch today. Click the link to visit our store, then scroll down to the Customers Also Add section to purchase the original replacement part and the tools you’ll need for this repair at a discount.

Tools You’ll Need

Before starting the back cover replacement on the Apple Watch Ultra, gather the following tools. Using the correct tools will help you complete the repair successfully, without damaging delicate internal components, including cables and ports. We used the following tools and recommend them for safe, professional-quality DIY back cover replacement at home.

• Joe’s 50-in-1 Precision Screwdriver Set
• Nylon Spudger
• 0.1mm Thin Screen Pry Tool
• Heat Gun
• Joe’s Isopropyl Alcohol
• Heat-proof Anti-skid Rubber Work Mat

Not ready to invest in tools yet? Find your device in our repair catalog, select the issues it’s experiencing, and send it to us. Our repair ninjas will restore your device to peak working condition.

Step-by-Step DIY Guide to Replacing the Back Cover on the Apple Watch Ultra at Home

In this detailed DIY repair guide, we show you how to replace the worn-out back cover on the Apple Watch Ultra yourself. Follow each step carefully and use the accompanying images as a visual guide to complete the repair with confidence.

Step 1: Extract the Old Back Cover

1.1. Unfasten the 4 small screws using a T6 screwdriver from the Joe’s 50-in-1 Precision Screwdriver Set.

1.2. Extract the 4 waterproof seals and store them safely for later.

1.3. Using a heat gun set at 200°C (392°F) and 50 air speed, soften the waterproof seal between the back cover and the rest of the watch body.

1.4. Insert a thin pry tool in the seam between the back cover and the watch body and gently pry upward from all four sides. You can alternate between the pry tool and the nylon spudger as required. Be careful not to damage the delicate interior wires or the waterproof seal during this step.

1.5. Disconnect the ribbon cable from the back cover.

1.6. Remove the 2 brackets from the back cover and store them safely.

Step 2: Install New Back Cover

2.1. Before installing the new back cover, clean the watch seam using isopropyl alcohol.

2.2. Install the 2 small brackets and seals on the new back cover.

2.3. Reconnect the ribbon cable with the sensor port on the back cover.

2.4. Align the second connector on the watch body with the port on the back cover. You may have to adjust the sensor’s position on the watch body with a plastic spudger to ensure a proper fit.

2.5. Once both halves of the watch are flush, install the 4 seals, then the 4 small screws to ensure a factory-like waterproof fit.

Congratulations! Your Apple Watch Ultra is Ready to Use

You have successfully replaced the worn-out back cover on the Apple Watch Ultra with original replacement parts. Remember to test the buttons, Bluetooth pairing, and heart rate monitoring to ensure the smartwatch is working properly.

If you found this guide helpful and would like to try your hand at DIY gadget repair, visit our store for essential tools and spare parts. You can also check out our at-home DIY smartwatch repair guides for other popular brands, including Apple, Fitbit, Garmin, and Samsung.

Have questions or suggestions about this repair? Text a repair ninja or email us, and we’ll reply shortly.