Philips - GoPure GP5212

Philips gopure 5212 is essentially an upgraded medify

Don't do this, cabin motors are not rated to deal with the increased static pressure a hepa filter will incur. You'll break your motor at worst and reduce your airflow at best. Get a good rated brand for your car that is pm 2.5 and has some level of carbon ideally. As for purifier, without breaking the bank the Philips gopure 5212 is probably your best bet.

I've seen this a lot, I don't think it's a real brand. It is unlikely it will be very effective or offer any long term support/replacement filters. There are very few actual quality brands. If you're willing, you could get a pure sine inverter for the car and plug in a "small room"/tabletop purifier which would be the best option. Otherwise, replace your car's HVAC filter with a PM2.5 filter with some carbon. Hard to recommend a brand since every car model has different options, find something recognizable and with good reviews. Always run the air on recirculate unless you are in a mostly car free area outside of a city. If you're in that kind of area driving slow crack your windows. Leave windows cracked while you start the car and if you can, after you turn it off. Combine that with a Philips gopure 5212 and that's probably the best "official" way to get better air quality in your car.