When your Subaru key fob stops working from across the parking lot, it's probably just the battery - and this 2-pack of CR1620 batteries with tools makes replacement super easy. These are genuine OEM-quality batteries, exactly what came with your remote originally. The kit includes two batteries plus opening tools that help you pry open the key fob without scratching or damaging the case. There's even a video tutorial showing exactly how to replace the battery step-by-step. Works with traditional Subaru keys (not push-to-start models) for Outback, Forester, Crosstrek, Impreza, Legacy, WRX, Ascent, and Tribeca. The specific FCC IDs that work are CWTWBU766, CWTB1G077, and CWTWB1U811. No reprogramming needed after battery replacement - just pop in the new battery and you're back in business. Save yourself the dealership service appointment and $50+ labor charge for a 5-minute job you can do yourself. Having two batteries means you've got a spare for when the next one dies, or you can do both your primary and spare keys at the same time. Seriously, one of the easiest car maintenance tasks you'll ever do.