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Old 12-28-2012, 04:45 PM
NOVA99 NOVA99 is offline
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Location: USA
 
Join Date: Feb 2012
Posts: 17
Mein Auto: 2013 BMW X5 50i
Sulfur odor is poor fuel quality or cheap gas. Sometimes diagnosed as catalytic converter issue. Purchase some high octane +93 octane for a few tanks, from a respected, well visited fuel station...Shell is what i use - 93 octane. Try that and see what happens. Otherwise it is the fuel mapping on ECU.

X50 w/ M-Perf. 15.6 MPG on almost 9K miles. City and Spirited Driving. Top Speed 133mph...so far.
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