If your tire pressure warning light is on, these ACROPIX sensors are exactly what you need! This 4-pack replaces your old or broken tire pressure monitoring sensors for various Chrysler, Dodge, and RAM vehicles from 2006-2010. Specifically designed to fit RAM 1500, 2500, 3500, 4500, and 5500 models from 2009, plus Chrysler 300, Town & Country, Dodge Charger, Caravan, and several others. They operate at 433MHz frequency and have a battery life of 5+ years, which is pretty standard for quality sensors. The installation is straightforward - any tire shop can swap out your old sensors for these new ones. After installation, there's a simple relearn procedure: park and turn off the engine for 20 minutes, keep the key fob away from the vehicle, then drive above 25 km/h for 5-10 minutes. The system should automatically recognize the new sensors. These monitor both pressure (100-900kPa range) and temperature (-40°C to +125°C), giving you accurate readings for safer driving. They're made from durable plastic, metal, and rubber materials that withstand road conditions. Much more affordable than dealership parts but still provide reliable performance. Just make sure to confirm your vehicle's exact model year and frequency before ordering to ensure compatibility!