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We had issues with our 2005 BMW 325i Sulev model with M56 engine. Every time fuel tank was filled past half, parked over night, fuel would be found on the ground the following day. 'check gas cap' message would appear on dash. Following codes would come up when scanned: P0171 and P0174 lean on bank 1 and bank 2. A fuel tank leak was also detected. We were able to determine issue. View entire video to find out cause. Contact us with questions and be sure to visit our website.

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