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Yes, it does. The B46 is a super-ultra low emission vehicle (SULEV) version of the B48. It has some differences to meet stricter emissions standards in states like California. The layout and engineering is the same, so the VANOS and timing chain is in the back. There's no reported problem with VANOS or the timing chain in these engines thus far, btw. It's more that the N20 and N47 engines have had timing chain issues, and VANOS issues have come up over the years on many engines. Both should not be an issue if you are leasing. If you are buying, it depends on whether you have a warranty and your appetite for risk.
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