Plain-English guides
Clear answers on car tech and accessories
Learn how dash cams, scanners, mounts, lights, speakers, and chargers work, plus what to check before you buy or install.
Clear steps
Short guides that make each setup or fix easy to follow.
Source based
We use product details, manuals, and other public sources.
Kept current
Guides are reviewed and updated as products and details change.
Clear disclosure
Affiliate links are labelled. See how we earn on our disclosure page.
What we cover
Guides by topic
Pick a topic and get a simple guide.
Dash Cams
Dash cams explained: front and rear models, night recording, parking mode and how dash cams are fitted.
OBD2 Scanners
What an OBD2 scanner does, scanner vs code reader and how to use one, with beginner-friendly picks.
Phone Mounts
Car phone mounts for dashboards, vents and windshields, including options for thick cases and larger phones.
Car Speakers
Car speaker size guides, coaxial vs component speakers and fixes for common speaker problems.
Car LED Lights
Interior and exterior car LED lights: LED vs halogen bulbs, how to choose them and basic installation guidance.
USB Car Chargers
USB-A vs USB-C car chargers, fast charging for phones and what to check when a car charger stops working.
From the blog
Latest guides
See the newest guides and fixes here.
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How to Install LED Interior Lights in a Car Step by Step
Use a plug-in 12V kit for a temporary setup or hardwire with an add-a-fuse for a cleaner install. This guide covers placement, wiring, and…
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Do Magnetic Phone Mounts Affect GPS, Signal, or Bluetooth?
Magnetic phone mounts usually do not affect GPS, cellular signal, or Bluetooth, but they can skew the compass and disrupt wireless charging or NFC.
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OBD1 vs OBD2: What Is the Difference?
OBD1 is the older, manufacturer-specific setup, while OBD2 is the standardized 16-pin system used on most U.S. gasoline cars and light trucks from 1996…
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Dual Dash Cam Front and Rear vs Front and Inside
Front and rear is usually the better setup for most drivers; front and inside fits rideshare and fleet use. Compare coverage gaps, privacy, and…
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HID vs LED Headlights: Which Should You Buy?
Choose HID for xenon projector housings and LED for LED retrofits or full LED assemblies; the wrong match can cause glare and poor beam…
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Why Does My Car Charger Say Charging but Not Charge?
A charger light can mean power, not real charging. Check the socket, fuse, plug, cable, and phone or battery before replacing parts.
Start here
How to use this site
Pick a topic
Choose the area you need help with from the topics above.
Read the guide
Each guide answers one question in plain English.
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Follow the product links to compare options and check the current price on Amazon.
About
About Exfig
Exfig publishes plain-English guides on dash cams, OBD2 scanners, mounts, audio, lights, and chargers. Each guide focuses on one clear question.
We may earn a commission from qualifying Amazon purchases made through links on this site. Read our affiliate disclosure.
How we write our guides
- Research-basedGuides start from real search questions and product details.
- Plain EnglishShort answers first, with no jargon.
- Updated when products changeWe revisit guides as products and advice change.