If it is a burnt valve, and you can't(don't want to) do th work yourself, figure on about $1500+(they will only fix the bad valve, you don't get all new valves). If you want to do the work yourself, you could could have both heads rebuilt, get new gaskets, sensors, and have all of your injectors cleaned/rebuilt for under $1000. I have had to do fix burnt valves twice, once through the dealer for $1700(1 of the odd side valves), the second time I rebuilt the top end myself(had a burnt #4) last April. For the same amount of money I would have spent at the dealer, I basically got two new complete heads, all of the gaskets/sensors, and headers/ exhaust. You will definately get more for your money if you can/want to do the work yourself. You should have a wet/dry compression test done first, this will tell you wether or not you have a valve problem.