Frequently Asked Questions

What does it mean when the check engine light comes on in a 2023 BMW 4 Series Gran Coupe?

• It indicates the vehicle’s engine management system has stored a fault code—anything from a loose gas cap to an emissions sensor or catalytic converter issue.
• At Nalley BMW of Decatur our factory-trained technicians use BMW diagnostic tools to read exact codes, explain findings, and recommend OEM repairs that preserve performance and resale value.
• Quick, accurate diagnosis often prevents bigger repairs. We frequently find that timely dealer service reduces long-term cost and downtime compared with deferred fixes.
• We offer transparent pricing, service financing to get repairs done now and pay later, and regularly updated service specials to lower out-of-pocket expense.
• Remember: warranty-covered repairs must be performed at a certified dealership like Nalley BMW of Decatur to maintain coverage and ensure OEM parts and procedures.

How long does a check engine light service take?

• Simple diagnostics and code reads can be completed in about 30–60 minutes; most common repairs (sensor replacement, throttle reset) are often same-day services.
• Complex repairs—such as catalytic converter work or multi-component troubleshooting—may require vehicle hold time, but our team will provide a clear time estimate before work begins.
• Nalley BMW of Decatur prioritizes quick turnaround with genuine BMW parts and certified technicians to maximize vehicle longevity and minimize disruption to your schedule.
• You can schedule service online to reserve a bay, and check current offers via our service specials to reduce cost.
• We also offer service financing so you can address issues immediately and spread payments over time for added convenience and peace of mind.

How much does a check engine light diagnostic cost for a 2023 BMW 4 Series Gran Coupe?

• Diagnostics at Nalley BMW of Decatur typically start around $89 for a standard engine light code read and diagnostic evaluation; total cost depends on the underlying repair.
• Our pricing is competitive—often less than independent shops—because we combine efficient OEM procedures, trained technicians, and local service specials to lower your overall expense.
• Choosing the dealership can deliver immediate savings through accurate repair (avoiding repeat fixes) and long-term savings via proper OEM parts, which protect warranty and resale value.
• Explore current offers on our service specials and if you need help right away, schedule appointment online. We also provide service financing to help manage the cost.
• Remember, warranty repairs must be completed at a certified dealership to preserve coverage and ensure work is performed to BMW standards.

What is the most common reason for check engine light on a 2023 BMW 4 Series Gran Coupe?

• The most frequent causes include oxygen sensor faults, ignition coil or spark plug issues, and evaporative emissions system faults like a loose filler cap or purge valve.
• Even small issues can affect fuel economy and emissions; our technicians prioritize fixes that return your 2023 BMW 4 Series Gran Coupe to peak performance quickly.
• We emphasize transparent diagnostics, OEM parts replacements, and documented service records—advantages that lead to both immediate and long-term savings compared with uncertain quick fixes.
• Use our online scheduler to schedule service or check available service specials to reduce costs.

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

• Start simple: ensure the gas cap is tight and the filler is sealed—this resolves many evaporative system codes.
• If the light persists, drive carefully to Nalley BMW of Decatur; our factory diagnostic tools will read stored codes and give a clear repair path.
• We recommend against clearing codes yourself without diagnosing—the light can return, hiding a persistent fault and potentially increasing long-term repair costs.
• To minimize downtime and avoid bigger bills, schedule appointment with our certified team and review available service specials. Service financing is available to get repairs started immediately.