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      10-07-2013, 09:59 AM   #56
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Unsure if this TSB helps:


2013 BMW X5 Technical Service Bulletin


HOME » B » BMW » X5 » 2013 » 10051419


NHTSA Item Number: 10051419
Service Bulletin #: SIB160712
Replacement #:
Vehicle/Equipment Make: BMW
Vehicle/Eqipment Model: X5
Model Year: 2013
Mfg Component Code: 070000 FUEL SYSTEM, GASOLINE
Date of Bulletin: 2012-12-01
Date Added: 2013-03-05
Summary: BMW: SERVICE ACTION: REPLACE THE LEFT AND RIGHT FUEL LEVEL SENSOR. DUE TO HIGH PROPORTION OF ETHANOL IN THE FUEL, THE INTERNAL MECHANISMS OF THE FUEL LEVEL SENSORS MAY SWELL. THIS MAY INHIBIT THE MOVEMENT OF ONE OR BOTH OF THE FUEL LEVEL SE


This "Autosol® Metal Polish cleaner" is good, $ 9 :
Developed in 1929 for the German auto industry, this metal polish is effective on a wide range of materials including steel, stainless steel, brass, chrome and copper (not recommended for silver or anodized aluminum). Applied with a soft cloth and wiped away, it uses a fast-acting chemical reaction to remove rust and tarnish, leaving an invisible film that inhibits oxidation for months.

Replacement if required is separate issue from cleaning:

Service: Special : Fuel Injector Flush: $159

Maintain Your BMW

Recent field experiences have shown a significant increase in various drivability complaints due to excessive carbon deposits in engines' combustion chambers on the intake valves and fuel injectors. The overall increase in carbon deposit accumulation is generally attributed to poor gasoline quality; namely, a low level of cleaning additives and fuel contamination.



Combustion chamber deposit formation is a by-product of the gasoline burning process. Fuel injector and intake valve deposits may become less troublesome with the recently introduced Top Tier Detergent Gasoline deposit control standards. However, vehicles that do not exclusively use a Top Tier Detergent Gasoline or are regularly driven under sever conditions such as stop-and-go traffic, high ambient temperatures and high altitude, can experience performance problems caused by intake system and combustion chamber deposits.



The most common complaints may include:
◦Hesitation or stumble during acceleration or even loss of power
◦Poor fuel efficiency
◦Increase emissions of HC and CO
◦Check engine lamp illumination due to intermittent misfire faults or lean mixture adaptation values



BMW recommends using TOP TIER Detergent Gasoline with a minimum octane rating of AKI 91 and with alcohol content of less than 10% by volume (or any other oxygenates with up to 2.8% of oxygen by weight). Only the exclusive use of Top Tier Detergent Gasoline provides the full benefit of reducing deposit formation.
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