So what it comes down to... replace both!! Is this a hard DIY? I have all 4 to do actually..

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2005 LeMans Blue e53 4.8is
MODs
///LeMans Blue RBs///Intravee II///Sirius///ACS Spoiler///AiB v3///HID Fogs///LED Tails///
///215 20" Ferric Gray///MTEC Pedals///DVD Headrests///SMG M Wheel///AFE CAI Stage 2