Frequently Asked Questions

What does it mean when the check engine light comes on in a 2020 BMW 5 Series?

• It signals that the vehicle’s onboard diagnostics detected an issue — anything from an emissions sensor fault to an engine misfire. Our factory-trained technicians at Herb Chambers BMW Certified Preowned Medford in Medford, MA use OEM-level tools to identify the exact fault code and recommend the correct repair.
• Getting prompt service at our dealership often costs less than independent shops once you factor in accurate diagnosis, OEM parts, and long-term reliability — reducing repeat visits and unexpected failures.
• Repairs covered under warranty must be performed at a certified dealership to keep coverage intact. We also offer service financing so you can get service now and pay later; when you’re ready, please schedule service.

How long does a check engine light service take?

• Most diagnostics are completed within 30–90 minutes; simple fixes (like a loose gas cap or sensor swap) can often be done same-day. More complex repairs may require parts ordering — we’ll give a clear estimate up front.
• At Herb Chambers BMW Certified Preowned Medford we prioritize efficiency with express bays, OEM parts on hand for common repairs, and certified technicians so you spend less time waiting and more time driving.
• To minimize downtime, check our service specials and schedule service online for a convenient appointment.

How much does a check engine light diagnostic cost for a 2020 BMW 5 Series?

• Diagnostic fees vary by issue, but our dealership offers transparent pricing and accurate diagnostics that prevent costly trial-and-error repairs. Compared with many independent shops, our total cost is often lower when you include correct repairs, OEM parts, and warranty protection.
• Dealership diagnostics save you money long term by preventing collateral damage — for example, addressing a misfire early avoids an expensive catalytic converter replacement.
• We provide clear estimates, accept service financing, and you can review current service specials or schedule appointment now.

What is the most common reason for check engine light on a 2020 BMW 5 Series?

• Common causes include oxygen sensor faults, catalytic efficiency codes, ignition misfires, or evaporative system leaks. On high-performance BMW engines like the 4.4L V8, misfires or turbo-related sensor faults are frequent triggers.
• Ignoring these codes can increase fuel consumption, reduce performance, and lead to costly component damage. Our certified techs diagnose the root cause quickly and recommend OEM repairs to protect your vehicle’s longevity.
• Use our online tools to schedule service, and ask about service financing and current service specials to lower upfront costs.

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

• Start with basic checks: ensure the gas cap is secure, check fluid levels, and note any new symptoms (power loss, odd noises, or smoke). However, because modern BMW systems are complex, a professional scan is the safest first step.
• Our dealership uses OEM diagnostic software to read manufacturer-specific codes and freeze-frame data so you get the correct repair the first time — saving money and time versus guessing.
• If you’d like immediate care, schedule service online. We honor warranty requirements and offer service financing and regular service specials to make repairs more affordable.