We received a letter in the mail today–turns out BMW is extending its warranty on the problem-prone Adblue tank on the 335d. See below for a picture of the letter from BMW. If you have a 335d you’re eligible for a 10 year/120,000 mile warranty on this item. If you’ve already repaired the adblue tank, reimbursement may be available. Contact your dealer if you have any questions.