Are you talking about the EGR valve or the EGR cooler? You can do preventative maintenance once a year by pulling the valve and cleaning it so it doesn't coke up too much (I replace the O rings when I do this). The OE cooler will eventually fail, and I think the Bulletproof diesel EGR cooler is the best replacement if you want to stay with a working EGR system. I can't say for sure, but I think the Bulletproof diesel EGR cooler is a long term fix for leaking EGR coolers, and is at least miles ahead of the OE one. If you ever do replace the EGR cooler, make sure you replace the oil cooler at the same time. Don't idle for extended periods or for warm up, and you will reduce coking/wetstacking issues overall.