Frequently Asked Questions

What does it mean when the check engine light comes on in a 2018 BMW 6 Series Gran Turismo?

• It signals that the vehicle’s diagnostics system has detected a fault — anything from a loose gas cap to a more serious emissions, ignition, or sensor issue.
• At Nalley BMW of Decatur, our factory-trained techs perform a full scan and explain findings in plain language so you understand immediate fixes and long-term benefits.
• We often cost less than independent shops when you factor in correct OEM parts, accurate diagnostics, and lasting repairs that help avoid repeat visits.
• Ask about service financing to get repairs done now and pay later; and remember, warranty-covered repairs must be completed at a certified dealership to remain valid.
• To get started, schedule service and we’ll prioritize a clear diagnostic and recommended next steps.

How long does a check engine light service take?

• Typical diagnostics at Nalley BMW of Decatur take about 30–90 minutes depending on code complexity and whether driving tests are required.
• If a simple corrective action is identified — like replacing a sensor or tightening a connector — many repairs are completed the same day.
• We focus on efficiency without cutting corners: OEM parts, calibrated tools, and manufacturer procedures minimize repeat failures and long-term costs.
• Our comfortable customer lounge and loaner options make it easy to wait or leave your vehicle while we complete service.
• Ready to book? Schedule appointment now and review current service specials for savings.

How much does a check engine light diagnostic cost for a 2018 BMW 6 Series Gran Turismo?

• Diagnostics vary by code and tests required; our dealership pricing is competitive and often less than independent shops when you include accurate diagnosis and OEM-correct repairs.
• Choosing Nalley BMW of Decatur means you get factory-trained technicians, transparent estimates, and long-term savings from properly performed repairs.
• We offer service financing to help you address repairs immediately while spreading payments over time.
• For ongoing savings, check our service specials and ask your service advisor about warranty coverage — warranty repairs must be completed at a certified dealership.
• Book a time to inspect your vehicle by using our secure scheduler: schedule service.

What is the most common reason for check engine light on a 2018 BMW 6 Series Gran Turismo?

• Common causes include oxygen sensor faults, catalytic converter issues, loose fuel caps, and malfunctioning mass airflow sensors.
• Left unaddressed, these can increase fuel use, reduce performance (your 2018 BMW 6 Series Gran Turismo’s efficiency), and risk more costly repairs down the road.
• Nalley BMW of Decatur’s approach focuses on diagnosing root causes, using OEM parts, and delivering repairs that extend vehicle life and reduce total ownership costs.
• We encourage timely diagnostics and offer service financing so you can repair now and save on future expenses from avoided damage.
• To get the right fix quickly, schedule appointment with our service team today.

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

• Start with a diagnostic scan to read the trouble codes; this directs the correct next steps instead of guessing repairs.
• Our technicians also perform visual inspections for easy-to-fix items such as loose caps, connectors, or obvious fluid issues.
• We provide a clear estimate and explain how dealership service often yields immediate and long-term savings through correct OEM parts and certified technicians.
• Remember, warranty repairs must be done at a certified dealership — Nalley BMW of Decatur ensures coverage integrity and thorough documentation.
• Click to schedule service or review current service specials before you visit.