2017 BMW M240i Convertible Service Requirements & Maintenance Schedule

Key Takeaways

• The 2017 BMW M240i Convertible (F23) is powered by the B58 3.0L turbocharged inline-six engine and uses BMW's Condition Based Service (CBS) system, which calculates maintenance needs based on driving style, fuel consumption, and trip length rather than fixed mileage alone.
• Original factory warranty coverage included a 4-year/50,000-mile basic and powertrain warranty, along with 3 years or 36,000 miles of complimentary scheduled maintenance (BMW Ultimate Care).
• The B58 engine has an oil capacity of 6.5 liters and requires BMW Longlife-17 FE+ (LL-17 FE+), Longlife-22 FE++ (LL-22 FE++), or Longlife-01 approved synthetic oil .
• While the CBS system typically indicates oil changes around 10,000 miles, Pelican Parts recommends a more conservative 5,000-mile interval for synthetic oil to maximize engine longevity .
• The ZF 8-speed automatic transmission benefits from fluid service every 50,000 miles as a preventive measure, with shorter 30,000-mile intervals recommended for modified or track-driven vehicles .

Understanding the BMW Condition Based Service System

The 2017 BMW M240i Convertible features the Condition Based Service (CBS) system, which represents a significant evolution from traditional fixed-interval maintenance. The system uses sensors and algorithms that monitor driving conditions to calculate the need for maintenance, adapting the service schedule to your specific driving profile . This results in variations from the base 10,000-mile interval—two identical vehicles may require service at different odometer readings depending on how they have been driven.

Because the CBS system is the primary guide for your specific vehicle, the reference intervals provided below should be used for planning purposes; actual service timing may vary based on driving conditions.

Engine and Drivetrain Specifications

The 2017 M240i Convertible is powered by the B58 3.0L turbocharged inline-six engine. The engine oil capacity is 6.5 liters with a filter change .

Engine Oil Specifications

The vehicle requires DOT 4 brake fluid meeting BMW specifications .

Service Interval Summary

Oil Change Guidance

Factory Schedule: The CBS system is the primary indicator for oil change intervals, with service typically indicated around 10,000 miles or 12 months depending on driving conditions.

Owner Guidance: Pelican Parts recommends changing synthetic motor oil every 5,000 miles for optimal engine protection . Always replace the oil filter when changing the oil.

You may need an oil change sooner than recommended if you notice the check engine or oil change light is illuminated, hear knocking sounds from the engine, smell oil inside the vehicle, or observe excess vehicle exhaust.

Spark Plug Service

Spark plugs are a key service item on the B58 engine. OEM spark plugs meeting BMW specifications are recommended for replacement . The CBS system will indicate when spark plug replacement is due based on driving conditions.

Brake Fluid Service

Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of the braking system . BMW generally recommends brake fluid replacement at intervals determined by the CBS system, typically every 2 years, to maintain braking performance and prevent corrosion in the hydraulic system. The vehicle requires DOT 4 brake fluid that meets BMW specifications .

Transmission Fluid Service

Factory Schedule: BMW does not specify a fixed replacement interval for automatic transmission fluid under normal operating conditions; the fluid is often designated as a "lifetime" fill.

Owner Guidance: The transmission is one of the most neglected service areas on a vehicle. As per ZF's recommendations, ECS Tuning suggests performing a full service on the 8HP automatic transmission every 50,000 miles . If your vehicle is modified, makes more power than stock, or is regularly track-driven, shorter 30,000-mile service intervals are recommended to extend the life of internal transmission components .

Engine Air Filter and Cabin Air Filter

The engine air filter and cabin air filter should be inspected and replaced as indicated by the CBS system. In dusty operating conditions, more frequent inspection and replacement may be warranted.

Maintenance Schedule Summary Table

Long-Term Ownership Considerations

Service Documentation

Maintaining complete service records is essential for warranty compliance and resale value. BMW service centers can read CBS system data stored in the vehicle to verify maintenance history. A full service history supports the vehicle's mechanical condition and reliability.

BMW Ultimate Care

The 2017 BMW M240i Convertible was originally covered under BMW Ultimate Care, which provided factory-scheduled maintenance for 3 years or 36,000 miles from the vehicle's in-service date. After this coverage expires, owners are responsible for all maintenance costs.

Cooling System

The B58 engine requires proper cooling system maintenance. Using Genuine BMW Coolant/Antifreeze is recommended to maintain cooling system performance. The coolant should be flushed and replaced according to the CBS system or at preventive intervals.

Battery Health

Modern BMWs rely on the battery for proper CBS system function. If the vehicle battery has been disconnected, the CBS system may not track time-based intervals accurately. A BMW service center should update the time-dependent maintenance procedures following any battery disconnection.

Frequently Asked Questions

What engine is in the 2017 BMW M240i Convertible?

The 2017 BMW M240i Convertible is powered by the B58 3.0L turbocharged inline-six engine. The engine oil capacity is 6.5 liters .

How does the Condition Based Service system work?

The CBS system uses sensors and algorithms to monitor driving conditions, driving style, and fuel consumption to calculate service needs dynamically. It displays service requirements on the vehicle's display and adapts maintenance to your specific driving profile .

What type of oil does the 2017 BMW M240i Convertible require?

The B58 engine requires BMW Longlife-17 FE+ (LL-17 FE+), Longlife-22 FE++ (LL-22 FE++), or Longlife-01 approved synthetic oil . Always refer to your owner's manual for the exact viscosity recommendation.

How often should the oil be changed?

The CBS system determines oil change intervals based on driving conditions, typically around 10,000 miles or 12 months. Pelican Parts recommends changing synthetic oil every 5,000 miles for optimal engine protection .

What type of brake fluid does the 2017 M240i Convertible require?

The vehicle requires DOT 4 brake fluid meeting BMW specifications .

When should the transmission fluid be changed?

BMW does not require automatic transmission fluid changes under normal conditions. As per ZF's recommendations, a full service on the 8HP automatic transmission is recommended every 50,000 miles . For modified or track-driven vehicles, 30,000-mile intervals are advised .

When should spark plugs be replaced?

Spark plugs should be replaced as indicated by the CBS system. OEM spark plugs meeting BMW specifications are recommended .

What is the 1,200-mile break-in service?

The 2017 M240i Convertible requires a running-in service at approximately 1,200 miles that includes engine oil and filter replacement, rear axle differential fluid replacement, and intercooler inspection. This service is critical for long-term vehicle health.

What was the original warranty coverage on the 2017 M240i Convertible?

The 2017 BMW M240i Convertible came with a 4-year/50,000-mile basic and powertrain warranty and 3-year/36,000-mile complimentary scheduled maintenance.

How often should the coolant be replaced?

The cooling system should be flushed and the coolant replaced as indicated by the CBS system. Using Genuine BMW Coolant/Antifreeze is recommended to maintain cooling system performance.