Software update: Denso CP1 systems
Subaru dropping a late night Friday surprise here, and I don't think this was on anyone's radar, but today 5/15 Subaru has released a software update for Denso CP1 systems:
* 2020-2022 Legacy/Outback (incl. Wilderness) per TSB 15-261-20R * 2022-2023 WRX per TSB 15-301-22R
(No word on BRZ yet)
I've already added the new patch notes and version numbers to the [subreddit wiki CP1 page](https://www.reddit.com/r/subaru/wiki/radios/cp1)
Here's the patch notes as listed:
* Loading/spinning icon may appear on the CID and the CCU may reboot or the loading icon may continue to reappear repeatedly, if the ignition is turned ON (IGN-ON) immediately after CAN bus operation is shut-off. * Bluetooth audio appears to be playing on the CID screen, but no sound is heard from the vehicle speakers. * If the ignition is cycled quickly (rapid IGN-OFF/ON) shortly after IGN-ON, the previously used audio source may not automatically resume playback. * When selecting a track from the list within the currently playing playlist the track list display may disappear. (iPhone iOS 16.4 or later). * After switching from CarPlay audio source to the radio source following conditions might be encountered: 1. No audio output and volume control is inoperative. 2. If Siri was being used while listening to audio at the previous IGN-OFF, the audio source may not automatically return to the previous source at the next IGNON. 3. If a hands-free call was active at the previous IGN-OFF, FM radio may play at the next IGN-ON. (Items 2 and 3 are cases where the switch occurs automatically due to IGN-OFF/ON.) * CarPlay may disconnect when ending Siri or ending a phone call. After this occurs, CarPlay may not reconnect. * After engine start, the recorded VBH boost peak value may be reset (cleared). (WRX only) * Correct an issue where the user name registered in the DMS (Driver Monitoring System) may disappear. * During a CCU software update via FOTA (Firmware Over-The-Air), if the engine is turned OFF at a specific timing near completion, the updated software may rarely become corrupted, causing the CCU to fail to boot (CID screen does not start).
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The above listed cars do have extended warranty coverage as outlined in [TSB 15-322-25R](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014870-0001.pdf) up to eight years / 150,000 miles.