This sounds like a job for an auto electrician, as it's impossible to diagnose something like this by remote control. But for reference, it could be something as complex as a major problem with the wiring harness and its networking, or something as simple as a flat battery in the key fob. But the fact that the car knows something is wrong and issues a fault warning is actually good news and suggests that an electronic scan of the car will throw up the answer pretty quickly.
Unfortunately, Alfa Romeo dragged its heels on warranty, and only made a five-year warranty standard after April 22, 2022. Which means your 2019 car came only with a three-year warranty which has, of course, now expired.
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If there are any common problems and complaints about Alfa Romeo's reliability or faults, they'll likely show up on our Alfa Romeo problems page. You can also calculate a car's projected resale value via our price and specs page.
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While Alfa Romeos have never had a stellar reputation for being reliable, maintenance-free cars so long as they're treated sympathetically and serviced on the dot there shouldn't be any reason they're not a good car. They look great and the Quadrifoglio is a real performance machine.
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