Being a California boy and having done legal engine swaps, there's absolutely no way one could get away with putting a diesel in the MZ5 here. But I agree that a small turbodiesel would be the best match.
It's rare when a dream engine swap would result in less power and torque. :p I'd lose too much torque with the 2.0L. The 2.5L SkyActive might be a bit more difficult, but should still be pretty straightforward and would have considerable more power and still a huge improvement in fuel economy...
Corrosion/rust is much less a concern for some of us (no snow, not close to the coast) so we can't imagine the struts completely breaking out of nowhere.
Couple threads on lighting with good info...
https://www.mazdas247.com/forum/showthread.php?123843342
https://www.mazdas247.com/forum/showthread.php?123842978
So, you want something easy that doesn't take up any extra space. Option one is a ready-made custom-fit enclosure which I don't think exists. Option 2 is optimizing the response of the replacement speakers with sound deadener, filler, and/ or enclosing the space behind them to get some more...
Since you build home speakers, have you thought of building a small sub enclosure? Something with an MDF front and a molded fiberglass rear that would be a custom fit in one of the side panels behind the third row. I hear it's kind of a pain and messy, but not especially difficult. The hard...
I also noticed the low amperage of the USB port, so I loaded one of these with a ton of music and it stays in there and the cig lighter port has a small USB charger in it.
My 2014 Sport has USB and aux input. FYI; USB only charges with the ignition on (or maybe stereo?). The 2015 Sport I saw did not have bluetooth which sort of surprised me.
Upstream sensor. Rockauto.com has a Denso brand (probably a good bet) for $91. Without shopping around further, I don't know if this is a good price, but they're usually pretty competitive. Don't forget to use anti-seize but keep the sensor tip clean.
The rear vents will not blow warm air. Per the owner's manual, warm air to the second row is handled by ducting under the front seats. This makes sense as heat rises and should be directed low rather than at your body or face like A/C. I find it rather uncomfortable when I'm riding with...
If you're not comfortable taking the door apart (removing interior panel, vapor barrier, etc), then I guess going to the dealer or, my recommendation, an independent shop with good reviews that specializes in Mazda's or at least Japanese cars.
I have no luck in finding a part number and cost...
My strategy was to wait a couple years until the current ones started to wear out and not support the hatch well. Then go to the dealer and get new ones. :)
Anyone see a flaw with this?
Clearing codes will not rectify any problems. Writing down the codes and looking them up may give you some insight as to what the problem(s) is/are, but there could be many codes that are due to misfires, etc. If you clear them, they will come right back... or at least the ones that are...