Gear & accessories

Tools and accessories worth keeping in your car, researched properly.

• Best dash cams: front, front-and-rear and parking mode

  Four dash cams that reviewers rate highly, from a budget 4K front camera to a front-and-rear kit, plus what to look for and where you can legally mount one.

• Best OBD2 scanners: code readers and Bluetooth apps

  An OBD2 scanner tells you why the check engine light is on. Here are four well-reviewed options, from a simple handheld to a more capable tool, and how to choose.

• Best portable jump starters for a flat battery

  Three well-reviewed lithium jump starters, how to match one to your engine, and how to store it safely so it works when you need it.