Car diagnostics and auto tools

Check engine light on? Start here: what the code means, whether it's safe to drive, and which scanner fits the job and your budget.

Start here

Which OBD2 scanner do I need?Answer 3 quick questions and get matching Autel and Launch scanners.Tire prices by sizePopular car, SUV and truck tire sizes with current prices from top brands.Check engine light codes explainedWhat each code means, common causes, and whether it's safe to drive.Black Friday OBD2 scanner dealsCurrent Autel and Launch prices, updated hourly.

Best picks

Best OBD2 scanners under $100What a sub-$100 OBD2 code reader can and can't do, what to check before you buy, and in-stock scanners under $100 from AUTEL and LAUNCH with current prices.Best scanners for ABS and airbag (SRS) codesWhy a basic code reader can't see ABS or airbag lights, what to look for in a scanner that can, and in-stock ABS/SRS scanners from our partner stores with current prices.Best bidirectional scan tools for DIY mechanicsWhat bidirectional control and active tests do, how much you need to spend, and in-stock bidirectional scan tools from AUTEL and LAUNCH grouped by price.AUTEL vs LAUNCH: which scan tool brand should you buy?How AUTEL and LAUNCH scan tools compare on range, price and updates, with in-stock models from both brands side by side at current prices.

Dash cams

Front, rear and cabin dash cams from Rexing. Check that the camera records the views you need and that it supports a large enough memory card.

Rexing V1 Basic 1080p Dash CamRexing V1 Basic 1080p Dash Cam$59.99at Rexing Rexing – C1 – 2K Front Dash Cam with Wi-Fi – BlackRexing – C1 – 2K Front Dash Cam with Wi-Fi – Black$59.99 $69.99at Rexing Rexing – SC4KS Ultra HD Car Dash Cam with Wi-Fi BundleRexing – SC4KS Ultra HD Car Dash Cam with Wi-Fi Bundle$99.99at Rexing Rexing V1-4K Ultra HD Car Dash Cam with Wi-FiRexing V1-4K Ultra HD Car Dash Cam with Wi-Fi$99.99 $119.99at Rexing Rexing – C2 – 2K Front + 1080p Rear Dash Cam with Wi-Fi – BlackRexing – C2 – 2K Front + 1080p Rear Dash Cam with Wi-Fi – Black$99.99at Rexing Rexing M1 Pro 2K Dual Mirror Dash Cam 1440p (Front) + 1080p (Rear)Rexing M1 Pro 2K Dual Mirror Dash Cam 1440p (Front) + 1080p (Rear)$99.99 $199.99at Rexing Rexing V3C Dual Camera Front and Inside Cabin Full HD 1080p Dash Cam with WiFiRexing V3C Dual Camera Front and Inside Cabin Full HD 1080p Dash Cam with WiFi$129.99 $179.99at Rexing Rexing V55 Dash Cam – 4K Modular Capabilities, 5.0 GHz Wi-Fi, and GPS Car Dash Camera RecorderRexing V55 Dash Cam – 4K Modular Capabilities, 5.0 GHz Wi-Fi, and GPS Car Dash Camera Recorder$149.99 $199.99at Rexing

Prices and availability come from each store's product feed and can change; check the store before you buy. These are affiliate links: COMPZA may earn a commission at no extra cost to you. How we make money.

Shop more on eBay

New and used options from eBay sellers. Prices, condition and shipping are set by each seller, so check the listing and the seller's rating before you buy.

OBD2 scannerson eBay Jump starterson eBay Battery chargers & maintainerson eBay Dash camson eBay Tire inflatorson eBay LED headlight bulbson eBay Car detailing kitson eBay All-weather floor matson eBay Wiper bladeson eBay Mechanic tool setson eBay Phone mountson eBay OEM car partson eBay

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Buying guides

🚗 How to choose a car diagnostic scannerCode readers, DIY scan tools and professional diagnostic tablets: how to choose an OBD2 scanner that fits your car and the work you do.

Common trouble codes

More picks are added to this section as new partner stores join. Some links on COMPZA are affiliate links; how we make money.