Most modern vehicles with embedded 4G/5G modems will receive a push notification.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
The alphanumeric code can be broken down as follows: 17tdt1eu-da31 Software Update
: You can check your current version by going to Setup > General > Software Information on your vehicle's touchscreen.
The identifier (including related numbers like 17TDT1EU-DA01 and 17TDT1EU-DA30) refers to the model code for the Display Control Unit (DCU) —the brain behind the multimedia and audio system—in various Toyota models, including the Toyota C-HR , Corolla , and RAV4 from approximately 2019 onwards. For owners, performing this update is often the only way to bring modern smartphone integration to their older vehicles. Most modern vehicles with embedded 4G/5G modems will
Before you attempt the update, carefully weigh the benefits against the potential risks – particularly the possibility of introducing new glitches. If you decide to proceed, follow the USB preparation and installation steps exactly, and always keep the engine running throughout the procedure. For those who prefer a hassle‑free experience, having the update performed by a Toyota dealer remains the safest, albeit more expensive, option.
Since the device has stopped receiving updates, using it today carries specific risks: If you share with third parties, their policies apply
Common issues and troubleshooting
Updating encryption protocols (specifically TLS ) to ensure secure communication between your car and internet-based services.
Detailed instructions for Over-the-Air (OTA) updates can be found on the Toyota Support Page Visual Walkthroughs A comprehensive video guide on Unlocking CarPlay/Android Auto walks through the USB formatting and installation process. For those using the newer multimedia platform, check this OTA update tutorial for step-by-step wireless instructions. User Discussions
Updating the system to a newer version (such as v1075, v1139, or v1170) brings several tangible improvements beyond just smartphone integration: