2014 BMW M6 Convertible Complete Maintenance Schedule & Service Guide

Key Takeaways

• The 2014 BMW M6 Convertible (F12 generation) uses the Condition Based Service (CBS) system, which uses sensors to monitor driving conditions and calculate individual service intervals, adapting maintenance to your specific usage profile .
• BMW Ultimate Service provides no-cost scheduled maintenance for 4 years or 50,000 miles from the original in-service date, covering factory-recommended maintenance as determined by the CBS system, with a 4-year/50,000-mile New Vehicle Limited Warranty .
• The S63 V8 engine requires BMW Longlife-approved synthetic oil with a capacity of approximately 9.5 liters . BMW recommends 0W-30 LL01FE for the S63 engine , or 5W-30 LL01 for Motorsport gasoline engines . Pelican Parts recommends changing synthetic motor oil every 5,000 miles .
• Brake fluid should be replaced after 3 years for the first time, then every 2 years thereafter . The system requires DOT 4 Class 6 fluid with a capacity of approximately 1 liter .
• Spark plugs and air filters are to be replaced with every second engine oil change . The rear axle differential oil is replaced with each third engine oil change, and the cabin microfilter is replaced at every engine oil change .
• The 2014 M6 has multiple active service bulletins addressing coolant pump leaks, turbocharger coolant line leaks, high-pressure fuel injector issues, DCT oil leaks, and other S63 engine-specific concerns .

Understanding the 2014 BMW M6 Convertible (F12 Generation)

The 2014 BMW M6 Convertible is part of the F12 generation, powered by the S63T 4.4L twin-turbo V8 engine, available in two power outputs: 423 kW (standard) and 441 kW (Competition Package) . This high-performance grand tourer features a retractable hardtop and sophisticated M-tuned chassis and drivetrain.

The BMW Maintenance System

The 2014 M6 Convertible does not follow a traditional fixed-mileage maintenance schedule. Instead, it employs the Condition Based Service (CBS) system . Sensors and special algorithms take into account the driving conditions of your vehicle—including engine temperature, driving style, trip length, and component wear—to recognize maintenance requirements . The system makes it possible to adapt the amount of maintenance corresponding to your individual user profile .

Service data is continuously stored in the remote control . Your BMW service center will read out this data and suggest the appropriate service procedures for your vehicle . Service requirements can be displayed on the Control Display .

Never ignore CBS alerts. Prompt attention to service notifications prevents minor issues from developing into costly repairs. If the vehicle battery was disconnected for storage periods, the CBS system may not accurately track time-dependent maintenance—have a service center update procedures such as checking brake fluid and changing engine oil and microfilter/activated-charcoal filter .

BMW Ultimate Service & Warranty Coverage

The 2014 BMW M6 Convertible includes comprehensive factory coverage from its original in-service date :

The BMW Maintenance Program is a benefit designed to help reduce the cost of ownership by computing maintenance intervals based upon the specific manner in which each individual vehicle is driven . Coverage begins on the date of first retail sale or the date the vehicle is first placed into service .

Detailed warranty information is listed in the Service and Warranty Information Booklet for US models or in the Warranty and Service Guide Booklet for Canadian models . If the vehicle is not maintained according to factory specifications, serious damage could result that is not covered by the BMW New Vehicle Limited Warranty .

Scheduled Maintenance Intervals

The following intervals represent factory-specified guidance for the 2014 BMW M6 Convertible . The CBS system remains the definitive authority for your specific vehicle's needs.

Engine Oil Service

Factory Guidance

The S63T 4.4L twin-turbo V8 engine requires BMW Longlife-approved fully synthetic oil with a capacity of approximately 9.5 liters . The CBS system determines the exact oil change interval according to the service display .

BMW recommends the following oil specifications for the S63 engine :

Oil Filter: Always replace the oil filter simultaneously with an oil change . Motor oil is the single most important element in keeping your engine healthy .

Service Bulletin Note

A BMW service bulletin (SI B11 01 13) addresses the correct oil level measurement procedure for the S63 engine, helping identify the actual oil level and advising the amount that will need to be added to correctly fill the engine when topping up .

Conservative Owner Guidance

Pelican Parts recommends changing synthetic motor oil every 5,000 miles for optimal engine protection, despite CBS intervals potentially extending beyond that .

Signs that an oil change may be needed sooner include:

• Check engine/oil change light is on
• Engine knocking sounds
• Oil smell inside the vehicle
• Frequent dusty road driving, heavy loads, or low-speed driving for long distances

Spark Plugs

Factory Guidance

The 2014 M6 Convertible's S63 V8 engine requires spark plug replacement with each second engine oil change . The engine uses eight spark plugs (one per cylinder).

Symptoms of Worn Spark Plugs

• Rough idle
• Hesitation during acceleration
• Misfires under load
• Reduced fuel economy
• Check engine lights related to cylinder misfires

Air Filters

Engine Air Filter

The engine air filter should be replaced with each second engine oil change . A clean engine air filter ensures optimal airflow for combustion and prevents contaminants from entering the engine.

Cabin Air Filter (Microfilter)

The cabin air filter (microfilter) should be replaced at every engine oil change . This filter removes pollen, dirt, and harmful airborne pollutants from the cabin air and maintains HVAC system performance.

Brake Fluid

Factory Guidance

Brake fluid replacement is a time-based, safety-critical service. BMW recommends replacing brake fluid after 3 years for the first time, then every 2 years thereafter .

Brake Fluid Specification: DOT 4 Class 6

Capacity: Approximately 1 liter

Significance: Brake fluid is hygroscopic—it absorbs moisture from the atmosphere over time. Air in the brake fluid causes braking to feel spongy and significantly reduces braking efficiency. Pelican Parts recommends changing brake fluid every time you service your brakes .

Rear Axle Differential Oil

The rear axle differential oil should be replaced with each third engine oil change . This service is particularly important for the M6's Active M Differential, which uses electronically controlled multi-plate clutches and requires specific oil grades.

Transmission Fluid

The 2014 M6 Convertible is equipped with a 7-speed M DCT (Double-Clutch Transmission) . For 2012-2014 models, the transmission uses Pentosin DCTF-1 equivalent fluid .

Bulletin Note: SI B28 01 14 addresses DCT transmission oil leakage diagnosis, noting that incorrect diagnosis of DCT oil leaks may lead to unnecessary part replacements and repeat customer repair visits .

Service Consideration: While the BMW factory schedule does not specify a fixed interval for transmission fluid replacement, many independent specialists recommend transmission fluid changes at major service intervals (60,000-100,000 miles) for performance-driven vehicles. Check your owner's manual for the exact transmission fluid specification for your vehicle.

Known S63 Engine Service Bulletins

The 2014 BMW M6 Convertible has multiple active service bulletins that owners should be aware of :

Cooling System:

• Coolant Pump Replacement (Bulletin 110113): Coolant is leaking from the coolant pump due to cracks in the plastic housing .
• Turbocharger Coolant Return Pipe (Bulletin 110513): Coolant leaking at the turbochargers with Check Control message for low coolant level .
• Heat Insulators Retrofit (Bulletin 111714): Possible coolant leak at exhaust turbochargers due to excessive heat buildup in the area of the turbocharger coolant lines .

Fuel System:

• High-pressure Fuel Injector Replacement (Bulletin 130712): Addresses cold start issues, rough running, and misfires on N63 and S63 engines .

Engine Management:

• DME Internal and Valvetronic Faults (Bulletin 120415): Service Engine Soon light illuminated with erroneous internal and Valvetronic faults stored in the DME at cold ambient temperatures .
• Boost Pressure Faults (Bulletin 121013): S63T engine sets "Charge Pressure Too High" fault above 6,000 RPM, causing engine failsafe program .

Transmission:

• DCT Oil Leakage Diagnosis (Bulletin 280114): Guidance on correctly diagnosing DCT oil leaks to avoid unnecessary part replacements .

High-Voltage Battery:

• Battery State of Charge Bulletin: Starting with the 2014 model year, BMW has modified the high-voltage battery charge maintenance for certain hybrid vehicles .

Long-Term Ownership Considerations

S63 Engine-Specific Considerations

The S63 4.4L twin-turbo V8 has documented service considerations:

High-Pressure Fuel Injectors: BMW issued service bulletin 130712 addressing high-pressure fuel injector replacement procedures for N63 and S63 engines . Symptoms include rough running, misfires, and cold start issues .

Cooling System: Multiple service bulletins address coolant leaks from the coolant pump, turbocharger coolant return pipes, and the need for heat insulators on turbocharger coolant lines . These are important to address promptly to prevent overheating and engine damage.

DCT Transmission: Bulletin 280114 advises that DCT oil leaks should be properly diagnosed before parts replacement .

High-Mileage Maintenance Planning

For owners accumulating significant mileage, additional services become relevant:

60,000-100,000 Miles:

• Transmission fluid service (recommended by independent specialists for performance-driven vehicles)
• Engine air filter replacement (if not already done at second oil change intervals)
• Cooling system inspection and possible flush

120,000+ Miles:

• Oxygen sensor replacement
• Full transmission service
• Comprehensive vehicle inspection

Frequently Asked Questions

Does the 2014 BMW M6 Convertible have a fixed maintenance schedule?

No. The 2014 M6 uses BMW's Condition Based Service (CBS) system, which monitors actual driving conditions and component wear to determine service intervals rather than following a rigid mileage-based schedule . However, components like spark plugs, air filters, and differential oil follow fixed schedules tied to oil change intervals .

What is the oil change interval for the 2014 BMW M6 Convertible?

The CBS system determines the oil change interval according to the service display . The S63 engine has a total capacity of 9.5 liters . BMW recommends 0W-30 LL01FE or 5W-30 LL01 for the S63 engine . Pelican Parts recommends changing synthetic motor oil every 5,000 miles for optimal engine protection .

What brake fluid does the 2014 BMW M6 Convertible use?

The 2014 BMW M6 Convertible requires DOT 4 Class 6 brake fluid with a capacity of approximately 1 liter . BMW recommends changing brake fluid after 3 years for the first time, then every 2 years thereafter .

When should spark plugs be replaced on the 2014 BMW M6 Convertible?

Spark plugs should be replaced with each second engine oil change . The S63 V8 uses eight spark plugs.

When should the engine air filter be replaced?

The engine air filter should be replaced with each second engine oil change .

When should the cabin air filter be replaced?

The cabin air filter (microfilter) should be replaced at every engine oil change .

When should the rear axle differential oil be replaced?

The differential oil should be replaced with each third engine oil change .

What is the BMW Maintenance Program coverage for the 2014 M6 Convertible?

The 2014 BMW M6 Convertible is covered by the BMW Maintenance Program for 4 years or 50,000 miles from the original in-service date, which includes factory-recommended maintenance as determined by the Condition Based Service system . The New Vehicle Limited Warranty also covers 4 years/50,000 miles .

What are common service bulletins for the 2014 BMW M6 Convertible?

The 2014 M6 has multiple active service bulletins addressing: coolant pump leaks (110113), turbocharger coolant line leaks (110513, 111714), high-pressure fuel injector procedures (130712), DCT oil leak diagnosis (280114), DME faults at cold ambient temperatures (120415), and boost pressure faults (121013) .

What transmission fluid does the 2014 BMW M6 Convertible use?

The 7-speed M DCT transmission uses Pentosin DCTF-1 equivalent fluid for 2012-2014 models .