Scosche SABW525 2002-Up 3-Series Front Door Speaker Adapter (Pair) UPGRADE YOUR SPEAKERS: Adapters enable you to upgrade the factory 5.25 to aftermarket speakers in the factory front door locations. SPEAKER COMPATIBILITY: Fits most aftermarket 5.25 speakers. VEHICLE COMPATIBILITY: 1999 to 2008 BMW 3-Series vehicles. QUALITY MATERIALS: High-grade ABS materials designed for a long lasting, secure fit. BUY WITH CONFIDENCE: Backed by Scosche's Lifetime Tech Support and Limited Lifetime Warranty