Not sure which 2005 Mercury Mountaineer Spark Plugs are right for you? We have over 146 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"The pulstar plugs were grate, what a difference from what I had even when they were also iridium plugs,I feel the power and some mpg and every bit counts or no ." —Willie B from Torrington, CT bought a Pulstar Performance Series Spark Plugs for a 2005 Mercury Mountaineer, 4.0L V6.