Engine Camshaft (VANOS) Adjustment Units: Limited Warranty Extension to 10 Years Without Mileage Limitation. INFORMATION BMW of North America, LLC ("BMW NA") is extending the limited warranty for the Camshaft (VANOS) Adjustment Units on certain model BMW vehicles equipped with the non-turbocharged 6-cylinder engine to: 10 years without mileage limitation, as determined by the vehicle's original in-service date. This "component-specific" limited warranty extension applies to defects in materials and workmanship and is subject to the applicable New Vehicle/SAV Limited Warranty's exclusions and limitations, in addition to the vehicle and coverage eligibility requirements. This bulletin is notice of a "limited warranty extension." This is NOT a notice of a Recall or Service Action. There is no immediate repair required unless the BMW vehicle is currently experiencing this problem.