Buying
The Dash Cam Accessories Worth Buying
A dash cam is only as good as what you pair it with. These are the accessories that genuinely change how well your camera works — and the ones worth skipping.
A high-endurance memory card (non-negotiable)
This is the accessory people skip and regret. Dash cams write continuously in a loop all day, a workload that wears out ordinary microSD cards quickly — often failing silently until the day you need a clip. A card explicitly rated high-endurance, with a U3/V30 speed class for 4K, is the single most important add-on.
A hardwire kit for parking mode
A hardwire kit wires the camera into your fuse box, freeing the 12V socket and, more importantly, providing constant power so the camera can record while parked. Insist on a low-voltage cutoff so it stops drawing power before your car battery gets too low to start.
A CPL filter to cut glare
On sunny days your dashboard reflects up into the windshield and that glare lands in your footage. A circular polarizing filter cuts those reflections for noticeably clearer daytime video. Buy one matched to your camera model so it fits the lens exactly.
A dependable mount
Mounts are unglamorous but they decide whether your camera is filming or lying in the footwell. Heat-resistant adhesive pads hold far better than suction cups that pop off on hot days, and a solid rear-camera bracket keeps the back lens aimed straight instead of drooping over time.
What to skip
Skip novelty add-ons that do not change the footage: decorative frames, unbranded “signal boosters”, and cheap all-in-one kits that bundle a low-endurance card. Spend the money on the card and power instead.
Our picks in this guide
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Frequently asked questions
What size memory card do I need?
128GB is a sensible middle ground for most single-channel cameras. Go larger if you run dual or triple channels, or want more parking-mode history before loop recording overwrites it.
Hardwire kit or battery pack for parking mode?
A hardwire kit is cheaper and simpler but draws from your car battery (with a cutoff for safety). A battery pack costs more but isolates the camera from your car battery entirely. See our dedicated comparison for the trade-offs.
Do CPL filters really make a difference?
Yes, on bright days. They noticeably reduce dashboard reflections and windshield glare. Just make sure you buy one designed to fit your specific camera model.