Frequently Asked Questions

What does it mean when the check engine light comes on in a 2016 BMW 5 Series Gran Turismo 550i xDrive?

• It signals that the vehicle’s onboard diagnostics detected an emissions, ignition, or sensor issue that needs attention.
• At Nalley BMW of Decatur we diagnose the exact code and explain options, often costing less than independent shops while delivering factory-trained technicians and OEM parts.
• Prompt diagnosis protects long-term value and fuel efficiency and can prevent larger repairs that may cost significantly more down the road.
• We offer service financing so you can get repairs now and pay later, and any warranty-covered repairs must be performed at a certified dealership to remain valid.
• To get started, schedule service or check our service specials for current offers.

How long does a check engine light service take?

• Most diagnostics are completed within one hour; additional repairs vary by the required parts and labor.
• Nalley BMW of Decatur prioritizes quick turnarounds with accurate OEM diagnostics so you return to the road faster and with confidence.
• Choosing our certified technicians often produces immediate and long-term savings through correct repairs and fewer repeat visits.
• We transparently share estimated times and costs, and you can schedule appointment online to reserve a convenient slot.
• Ask about our current service specials and available service financing.

How much does a check engine light diagnostic cost for a 2016 BMW 5 Series Gran Turismo 550i xDrive?

• Diagnostic costs vary; Nalley BMW of Decatur provides transparent pricing and often costs less than many independent shops while offering certified technicians and genuine BMW parts.
• We emphasize the immediate and long-term savings of correct dealer diagnostics—avoiding misdiagnoses that can lead to repeated repairs.
• If repairs are covered under warranty, those services must be completed at a certified dealership to protect coverage.
• Contact us or schedule service to receive an accurate quote and learn about our service specials.
• We also provide service financing options to help you get repairs now and pay later.

What is the most common reason for check engine light on a 2016 BMW 5 Series Gran Turismo 550i xDrive?

• Common causes include oxygen sensor faults, loose fuel caps, catalytic converter issues, or ignition misfires—issues our factory-trained techs diagnose precisely.
• Addressing these quickly at Nalley BMW of Decatur prevents reduced fuel economy, emissions failures, and costly downstream repairs.
• We document findings, recommend OEM repairs, and explain cost vs. benefit so you can make informed decisions.
• Use our online schedule service tool and review current service specials to save on diagnostics and repairs.

What is the first thing to check when the check engine light comes on?

• Verify the gas cap is tight and undamaged—an easy step that sometimes resolves the light.
• If the light persists or flashes, bring your 2016 BMW 5 Series Gran Turismo 550i xDrive to Nalley BMW of Decatur for a professional scan to identify exact fault codes.
• Our certified technicians will explain the findings, repair options with OEM parts, and warranty implications—repairs covered under warranty must be performed at a certified dealership.
• To protect performance and resale value, schedule service promptly and check our service specials to maximize savings.