Question: how much to replace battery in bmw key?
Answer: But the most common BMW key batteries are 3v coin batteries like the: CR2032, CR2450 and the rechargeable VL2020. How much does it cost to replace a BMW car key? BMW car keys must be programmed, this is usually done at a BMW dealership. When I lost a key, it cost roughly $400 to have the dealership program a new key.