Turn Your Old Car Into a Smart Ride: 5 Gadgets Under $50 You Didn't Know You Needed

Driving an older model doesn't mean you have to miss out on modern tech. You don't need a monthly car payment to have Bluetooth, navigation, or diagnostic tools. We've rounded up the top 5 best-selling car gadgets on eBay that will modernize your daily commute for less than the cost of a tank of gas.

Still stuck listening to CDs or local radio? This tiny device plugs into your cigarette lighter and beams music from your phone to your car speakers via FM radio.

• Why you need it: Hands-free calling and Spotify in a 2005 car.

• Price: Usually under $15. Read our Full Review & Setup Guide

That "Check Engine" light is terrifying (and expensive). This tool plugs into your dashboard and tells you exactly what's wrong instantly on your phone.

• Why you need it: Save hundreds on diagnostic fees.

• Price: Usually under $25. Read our Full Review & Setup Guide

Stop looking for quarters at the gas station air pump. This digital inflator runs off your car battery and stops automatically when the tire is full.

• Why you need it: Safety and peace of mind.

• Price: Under $40. Read our Full Review & Setup Guide

Project your speed and GPS directions directly onto your windshield. It looks futuristic and keeps your eyes on the road.

• Why you need it: It looks cool and improves safety.

• Price: Under $35. Read our Full Review & Setup Guide

Transform the chaos of kids' toys, water bottles, and tissues into a neat, organized space.

• Why you need it: Sanity.

• Price: Under $20. Read our Full Review & Setup Guide

You don't need a new car to enjoy new car features. Click the links above to find the best deals on eBay today.