For Toyota Venza I would take Garmin Dash Cam Mini 2. Best choice currently.

Have you also considered Cobra RAD 480i Radar Detector? Might be a good alternative.

3D MAXpider Floor Liners - best option for Toyota bZ4X currently.

For Tesla Model X Long Range I would definitely pay attention to the compatibility, especially if it's about electronics.

What's your budget? That makes a big difference for Buick Lucerne.

Depends on what exactly you want to improve on Buick Regal. Performance or comfort?