Infant Car Seat & Base Compatibility

An extra base makes it easy to transfer your infant car seat from car to car. Find the right car seat and base combination for your Safety 1st seat with our Compatibility Guide. Using the diagram below, please locate the model number of your Safety 1st infant car seat to find compatible bases in the chart below. Your model number will start with an "IC". You will find the model number and manufacture date located on the side or back of the infant car seat.


Model Name (Model #)

onBoard™ 35 Adjustable Infant Car Seat Base (IC240)

Safety 1st Infant Car Seat Base (IC289)

onBoard™ 35 (IC201)  
onBoard™ 35 Air 360 (IC263)  
onBoard™ 35 LT Comfort Cool (IC272)  
onBoard™ 35 LT (IC261/IC285)  

Light 'n Comfy 35 (IC344)

Light 'n Comfy Luxe (IC185/IC233)  
Comfort 35 (IC360)  
onBoard™ 35 FLX - Included with Grow and Go™ Flex 8-in-1 Travel System (TR405/TR450/TR462)