2009 BMW 650i Convertible Complete Maintenance Schedule & Service Guide

Key Takeaways

• The 2009 BMW 650i Convertible (E64 chassis) is powered by the N62B48TU 4.8L V8 engine , producing 360 horsepower and 360 lb-ft of torque .
• BMW's Condition Based Service (CBS) system uses sensors and driving data to calculate maintenance needs based on actual driving conditions rather than fixed intervals . The CBS system monitors engine oil, brake pads (front and rear separately), brake fluid, and vehicle checks .
• The N62 engine requires BMW Longlife-01 approved synthetic oil with a capacity of 9.0 liters (approximately 8.4-8.5 quarts) with filter .
• Spark plugs are recommended for replacement at 60,000 miles, with a repeat service at 120,000 miles , though some references indicate 100,000-mile intervals for the N62's special iridium plugs .
• Oxygen sensors are scheduled for replacement at 100,000 miles, with repeat services at 120,000 miles and 150,000 miles .
• Brake fluid should be flushed and replaced at intervals specified by the CBS system—typically every 2 years or 30,000 miles .
• The vehicle originally came with free scheduled maintenance for 48 months or 50,000 miles from the original in-service date .

Understanding BMW's Condition Based Service (CBS) System

The 2009 BMW 650i Convertible utilizes BMW's Condition Based Service (CBS) system. Sensors and special algorithms take the different driving conditions of your BMW into account. Condition Based Service uses this to determine current and future service requirements . The system adapts maintenance to your specific driving profile, considering factors such as trip length, engine temperature, and driving style.

The CBS system monitors several key service items:

• Engine oil
• Brake pads (front and rear separately)
• Microfilter/activated-charcoal filter
• Brake fluid
• Spark plugs
• Vehicle check
• Legally mandated inspections depending on local regulations

Service Data in the Remote Control: Your vehicle stores required maintenance information continuously in the remote control during driving . After accessing the data stored in the remote control, your BMW Service Advisor can suggest precisely the right array of service procedures for your individual vehicle . You should therefore hand over the remote control you last used to drive to the BMW Service Advisor when you take your vehicle in for service.

Important Note: Make sure the date is set correctly; otherwise, the effectiveness of CBS Condition Based Service is not ensured .

Engine Specifications & Capacities

The 2009 BMW 650i Convertible is equipped with the N62 4.8L V8 engine (N62B48TU), a naturally aspirated 32-valve V8 featuring Valvetronic and Double-VANOS technology .

OEM Factory Maintenance Schedule

The following maintenance intervals represent key factory-recommended milestones for the 2009 BMW 650i Convertible . Exact intervals are determined by the vehicle's CBS system based on driving conditions .

Engine Oil and Filter Change

Motor oil is the single most important element in keeping your N62 engine healthy . BMW's CBS system will indicate when an oil service is due, with typical intervals determined by driving conditions. BMW recommends BMW High Performance 5W-30 Synthetic Oil .

Oil Specifications:

• BMW Longlife-01 approved synthetic oil
• Recommended viscosity: SAE 5W-30
• Capacity: 9.0 liters (approximately 8.4-8.5 quarts) with filter

Adding Engine Oil: Do not add 1 US quart/liter of oil until a corresponding message is shown on the Control Display. Add oil within the next 125 miles/200 km; otherwise, the engine could be damaged . If the oil level displayed is below minimum, add engine oil immediately—failure to do so may lead to engine damage .

Conservative Owner Guidance: BMW recommends having your motor oil changed at regular intervals . More frequent oil changes are advisable if you regularly haul heavy loads, drive in dusty areas, or drive at low speeds for long distances . In general, being extra-diligent about oil changes won't damage your BMW. Each oil change is another chance to check and resolve other car issues, such as worn brake pads or tire treads.

Signs Your Vehicle May Need an Oil Change Sooner:

• Check engine/oil change light is illuminated
• Knocking sounds from the engine
• Oil smell inside the vehicle
• Excess amount of vehicle exhaust

Spark Plug Service

Spark plugs are key components of the vehicle's ignition system. The N62 V8 engine uses special iridium plugs . The 2009 BMW 650i uses 8 spark plugs .

OEM Interval: Spark plugs are recommended for replacement at 60,000 miles , with a repeat service at 120,000 miles . Some references indicate replacement every 100,000 miles for the N62's special iridium plugs , while FCP Euro recommends replacement every 100,000 miles per BMW specifications .

Conservative Owner Guidance: Some service providers recommend replacing spark plugs every 3 years as preventative maintenance . Faulty spark plugs can lead to poor engine performance, evidenced by reduced power, misfires, and poor fuel economy .

Oxygen Sensor Service

OEM Interval: Oxygen sensors are scheduled for replacement at 100,000 miles , with repeat services at 120,000 miles and 150,000 miles . Oxygen sensors deteriorate on a mileage basis, and replacement helps maximize fuel economy and minimize exhaust pollution.

Automatic Transmission Service

OEM Interval: Automatic transmission fluid replacement is recommended at 100,000 miles .

Conservative Owner Guidance: Over the life of a vehicle, the transmission can often be overlooked when performing routine maintenance. If left unserviced, the automatic transmission fluid will break down, potentially leading to poor shifting, slipping, and ultimately transmission failure. BMW recommends exchanging transmission and differential fluids at certain intervals with BMW-approved products.

Brake Fluid Service

OEM Interval: Brake fluid should be flushed and replaced at intervals specified by the CBS system . A typical interval for brake fluid service is 30,000 miles , with repeat services at 60,000, 90,000, 120,000, and 150,000 miles . The time-based interval is approximately 2 years .

Fluid Specification: BMW-approved brake fluid meeting manufacturer specifications.

Brake System Service

BMW suggests that at a minimum, front and rear brakes are disassembled and serviced at least once every 12,000 miles or 12 months, including inspecting the parking brake.

Brake Pad Life: Brake pads often last 30,000 to 40,000 miles. Factors like driving mostly on highways and braking smoothly can help your brake pads last longer. If you often haul heavy loads or ride your brakes, your brake pads may wear out sooner.

Signs of Brake Issues:

• Unusual noises (squealing or grinding)
• Vibration or pulsation in the pedal or steering wheel
• A burning smell near your tires
• An illuminated brake dashboard warning light

Coolant Service

OEM Interval: Coolant is recommended for replacement at 60,000 miles , with repeat services at 120,000 miles . The cooling system capacity is 14.4 liters.

Coolant Specification: Use BMW-approved coolant and ensure proper mixture with distilled water.

BMW Maintenance Program Coverage

The 2009 BMW 650i Convertible was covered by free scheduled maintenance for 48 months or 50,000 miles from the original in-service date . For vehicles beyond this coverage, owners should plan for out-of-pocket maintenance.

Service and Warranty Information

Please consult your Service and Warranty Information Booklet (US models) or Warranty and Service Guide Booklet (Canadian models) for additional information on service requirements . Maintenance and repair should be performed by your BMW center or a workshop that works according to BMW repair procedures with correspondingly trained personnel . Make sure to have regular maintenance procedures recorded in the vehicle's Service and Warranty Information Booklet, as these entries are proof of regular maintenance .

Long-Term Ownership Outlook

With proactive maintenance, a 2009 BMW 650i Convertible has a good chance of hitting 200,000 miles or more. The N62 V8 engine is capable of durability with proper care. Staying on track with routine service appointments can help your 650i perform better, increase your vehicle safety, and help you avoid expensive repairs.

Good maintenance should never be viewed as an expense—it is an investment that maintains the value and dependability of your car, extends its service life, and increases its resale value.