One problem related to ignition module has been reported for the 1999 Volvo V70. The most recently reported issues are listed below.
Just driving along and the ets light went on. Brought to the dealer and they replaced the etm module, for $1500. The car had 73,760 miles, and the unit is the exact same as the one they replaced. The dealer told me to expect this one to last the same amount of time, maybe more, maybe less.