They go bad just from all the dust and dirt they are exposed to. They are protecting you and your family so it's a small investment to assure it is working.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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