Volkswagen blocks Home Assistant by requiring client assertion

rcjordan · May 29, 2026, 6:29pm

Login no more possible, Android App still works · Issue #967 · robinostlund/homeassistant-volkswagencarnet

github.com/robinostlund/homeassistant-volkswagencarnet

[BUG] Login no more possible, Android App still works

opened 09:40AM - 27 May 26 UTC

JuRo1971

bug

## Before you post a new issue - you must first check the following (and check t…he boxes with an "X" below) - [x ] 1.) Can you login using the smartphone app Volkswagen/Volkswagen Connect and interact with your car? - [x ] 2.) Please make sure that you can login into https://vwid.vwgroup.io/ and make sure that any "Terms and Conditions" are all checked - [ ] 3.) I do not have MFA enabled. ? What is MFA? ## Environment - Volkswagencarnet release with the issue: - Last working homeassistant-volkswagencarnet release (if known): - Home Assistant Core release with the issue: - Operating environment (Home Assistant OS/Supervised/Container/Core/venv): - Car model and year: - Country where the car was bought: - Valid VW Connect subscription: - Have you verified that the We Connect service works via VW´s portal?: ## Describe the bug I got the message that the authentication is expired, re login with credential is nor more possible, Android app and browser based login still working without any issue ## Steps to Reproduce enter email and pw Error message: Anmeldung bei Volkswagen Connect nicht möglich. Bitte überprüfe deine Zugangsdaten und stelle sicher, dass der Dienst verfügbar ist. ## Expected behavior Login is possible and integration works as before ## Screenshots ## Traceback/Error logs ```txt ``` ## Debug information - all JSON responses from logfile ## Additional context ## Note Issues lacking sufficient details or context may be subject to closure without prior notice. Detailed bug reports are essential for effective issue resolution. Thank you for your cooperation.

comment: This is not a bug. Volkswagen disabled the API permanently. It was nice while it lasted...

bobbyD · May 29, 2026, 6:36pm

There is always the risk of unofficial APIs to go away. We can all remember Life360, right, and many others? Can we really blame the companies for retiring a service that was not meant to be used by others?

aaiyar · May 29, 2026, 6:48pm

Sometimes official APIs go away. MyQ is a case in point. And wasn’t Life360 an official API?

What we’re learning over and again is that cloud-dependence was bad, and remains bad.

bobbyD · May 29, 2026, 6:57pm

Was a public API used with unofficial authorization tokens.

tray_e · May 29, 2026, 11:30pm

If I am paying for the service and it was open when I initially purchased it, yes.

aaiyar · May 29, 2026, 11:52pm

Open has such a broad meaning. If it was a published public API, then I am 100% with you.

OTOH, ff it is a reverse-engineered API as appears to be in this case, then by closing it, the manufacturer could “legitimately” claim to be making their/your system more secure.

tray_e · May 30, 2026, 12:23am

Reading through the comments, it was a free API. So that, I can kind of get it. Apparently, the paid version works.

My situation - My Subaru has subscriptions that are paid (the only way to get the access to the remote features in the first place) and a website that works. The HA app uses the web version to make its calls. So, presumably, they would have to shut down web access to shut down the HA app.

I don't really have an issue paying for the subscription. It requires cellular network to communicate, and requires servers. So, at less than the cost of a smart watch or tablet on my cellular carrier, I get remote access to my car. And I don't do a watch - cause bluetooth works just fine on my Garmin and I get three weeks on a charge - unlike my old cell compatible Samsungs that only lasted a day and a half at best.

So, if they kill the website, that was part of a paid subscription that I have to pay for a year in advance, then yeah, I would be upset and talking to my credit card company. (Their app is crap from an interface perspective)