Samsung Galaxy S21 Ultra Light Sensor Flex Cable Replacement

What You’re Getting

This is the exact flex cable that connects the light sensor on your Samsung Galaxy S21 Ultra. If your screen’s auto-brightness has stopped adjusting properly, or the sensor seems unresponsive, this part is designed to match your phone’s specifications perfectly.

Why This Part Works

Your S21 Ultra relies on its light sensor to automatically dim or brighten the display based on your surroundings. When that tiny cable fails, you’re stuck manually adjusting brightness. This replacement brings that smart functionality back, so your phone adapts smoothly whether you’re indoors or outside.

Installation Notes

Before you start, test the new cable with your phone powered off to make sure everything lines up. Use an anti-static wrist strap to prevent static damage. Handle the cable gently—avoid sharp bends beyond a 90-degree angle. If you’re not comfortable doing this yourself, many technicians across South Africa keep our components in stock for repairs.

Warranty Coverage

You’re covered for six full months with this purchase. If anything goes wrong, we’ll sort it out. Your order ships at no extra cost anywhere in South Africa. Need help? Message us at support@phoneparts.co.za or WhatsApp 063 193 2306. Hundreds of repair professionals choose our parts for their customers’ devices.