1. Coil failed on #1 cyl.
Normal item on these engines for those year
2.
As things usually go, two days after, HiD bulb dies on same car.
Quality VW components
Yeah, they are. Toyota uses exactly same components from same manufacturer. Except, changing coil in VW takes 5min, on Toyota takes 4hrs.
Quality components that fail? Right! So, VW is using Denso ignition coils? I thought they were using Bosch.
I have never had a coil fail on ANY vehicle that I have EVER owned. There isn't any need to worry about how difficult it is to replace a component that doesn't fail.
VW uses NGK. But I can see not failing on Toyota. Part of the reason why it fails on EA888 is that engines run hot (NGK provided different coils since 2012). It is bad bcs component like coil will fail. It is good, since Sienna is not drivable in cold weather, unless it was on block heater, so we take VW, just so that kids do not get pneumonia.
As for worry, yes there is, as Toyota requires spark plug change, which of course on Toyota V6 transverse mounted engine equals nightmare.
As for HiD, Sienna has those two candles in front which provide amount of light eqal to two AAA batteries, so yeah, there is no worry for HiD failure.
I changed the plugs on my Sienna at 130k miles, mostly because I was feeling guilty about not doing it at the recommended 110k miles and not because it was running badly or throwing misfire codes. Yes, the rear plugs were a hassle to replace, but it isn't really all that hard to do and was NOT a nightmare. All transverse V/6 engine vehicles have some challenging serviceability procedures, but all of the German vehicles I have worked on have serviceability issues of their own. NOBODY is designing/building vehicles with ease of service in mind.