Thanks. How did you know it was the post cat O2 sensor and not the precast? I bought the pre-cat one because the parts guy at the dealer was saying that they've never had to order the post cat, but they typically keep the pre-cat in stock, makes me think this might be a common failure.
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2018 F15 X5d Carbon Black/Nutmeg Individual- Oil Burner Tow Rig
2013 E82 1M3 Carbon Black/Black- S65/DCT Track Toy
2013 F25 X3 35i Alpine White/Chestnut- German American Family Hauler
Past: '11 E91 335is, '11 E90 M3, '10 X5M, '14 328d, '03 330i Dinan3 ZHP, '04 330i ZHP, '12 X3 35i
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