This isn't a "mod", but is something that I recently purchased and find extremely helpful for my i3:
https://safejacks.com/products/the-rennstand-by-safe-jack-single-unit
Works very well! It is innovative, extremely well built using high quality materials, and works on both my i3 and my wife's 5 series. You can get jack pad adapters to work with most any unibody vehicle. It's not cheap,but It's the first time I've been able to get 2 wheels off the ground at the same time on either of or our Bimmers.
I should note one caveat: Because the i3 is so low to the ground I had to drive the wheel that I wanted to raise onto a 2x4 to give the needed clearance for my floor jack and the top bar of the jack stand. Not a big deal, but necessary. I could probably have also driven it part way up one of my ramps to provide the clearance.
https://safejacks.com/products/the-rennstand-by-safe-jack-single-unit
Works very well! It is innovative, extremely well built using high quality materials, and works on both my i3 and my wife's 5 series. You can get jack pad adapters to work with most any unibody vehicle. It's not cheap,but It's the first time I've been able to get 2 wheels off the ground at the same time on either of or our Bimmers.
I should note one caveat: Because the i3 is so low to the ground I had to drive the wheel that I wanted to raise onto a 2x4 to give the needed clearance for my floor jack and the top bar of the jack stand. Not a big deal, but necessary. I could probably have also driven it part way up one of my ramps to provide the clearance.