The brief answer to this question is: possibly - it all depends on the reason why a couple chooses to renew their vows and it also depends on the level of effort each spouse is willing to put into the marriage going forward.
The renewal of wedding vows is a ceremony that many married couples undergo each year. Several couples choose to renew their vows to celebrate a milestone in their relationship, such as an anniversary. Other couples choose to renew their wedding vows in order to reconfirm or strengthen the marital bond. Although renewing marital vows may be a wonderful way for a couple to outwardly express their recommitment to one another, the act of renewing vows will likely not, by itself, save an unhealthy marriage.
As evidenced by the celebrity couples who ultimately divorced despite celebrating the renewal of their wedding vows, such as Seal and Heidi Klum, Nick Cannon and Mariah Carey, Demi Moore and Ashton Kutcher and Jon and Kate Gosselin, renewing wedding vows not a sure fire way to save a marriage. However, in conjunction with individual and couple's counseling, renewing wedding vows may be a great way for a couple to commit to working together to preserve the relationship. Take a look at our website for tips on saving a marriage or working on a marriage.