2018 BMW 640i xDrive Gran Coupe Complete Maintenance Schedule & Service Guide

Key Takeaways

• The 2018 BMW 640i xDrive Gran Coupe (F06 chassis) is powered by the N55 3.0L turbocharged inline-six engine and features xDrive all-wheel drive.
• BMW's Condition Based Service (CBS) system uses sensors to calculate maintenance needs based on actual driving conditions rather than fixed intervals .
• Spark plugs are recommended for replacement at 60,000 miles, with a repeat service at 120,000 miles .
• Oxygen sensors are due for replacement at 120,000 miles, with a repeat service at 150,000 miles .
• The N55 engine has an oil capacity of approximately 6.5 liters and requires BMW-approved synthetic oil .
• Brake fluid should be flushed periodically; dark or brown brake fluid indicates contamination and the need for immediate service .
• With proactive maintenance, this vehicle can achieve 200,000 miles or more .

Understanding BMW's Condition Based Service (CBS) System

The 2018 BMW 640i xDrive Gran Coupe utilizes BMW's Condition Based Service (CBS) system. Unlike traditional fixed-interval maintenance schedules, CBS uses sensors and algorithms that take into account the driving conditions of your vehicle to determine when maintenance is required . The system adapts the amount of maintenance to your specific driving profile, considering factors such as trip length, engine temperature, and driving style.

Service information on required maintenance is continuously stored in the vehicle's remote key fob. Your service center will read out this data and suggest the appropriate service procedures for your vehicle . The recommended maintenance schedule is put together by BMW, the vehicle manufacturer .

Storage Periods: Storage periods during which the vehicle battery was disconnected are not taken into account by the CBS system. If this occurs, have a service center update the time-dependent maintenance procedures, such as checking brake fluid and, if necessary, changing the engine oil.

Engine Specifications & Capacities

The 2018 BMW 640i xDrive Gran Coupe is equipped with the N55 3.0L turbocharged inline-six engine (engine codes N55B30/N55B30O0) .

OEM Factory Maintenance Schedule

The following maintenance intervals represent the key factory-recommended milestones for the 2018 BMW 640i xDrive Gran Coupe . Exact intervals are determined by the vehicle's CBS system based on driving conditions.

60,000 Mile Service

At 60,000 miles, the key scheduled maintenance item is replacing the spark plugs .

• Replace Spark Plugs

120,000 Mile Service

At 120,000 miles, multiple key services are recommended :

• Replace Spark Plugs
• Replace Oxygen (O2) Sensor

150,000 Mile Service

At 150,000 miles, the oxygen sensors require replacement again :

• Replace Oxygen (O2) Sensor

Engine Oil and Filter Change

Motor oil is the single most important element in keeping your engine healthy and helping it to enjoy a long life . The 2018 640i xDrive Gran Coupe uses the N55 engine with an oil capacity of 6.5 liters . BMW's CBS system will indicate when an oil service is due, with typical intervals around 10,000 miles depending on driving conditions .

Oil Specifications:

• BMW-approved synthetic oil
• The specific viscosity should be selected based on climate and driving conditions as specified in your owner's manual

Conservative Owner Guidance: More frequent oil changes are advisable if you regularly haul heavy loads, drive in dusty areas, off-road, or drive at low speeds for long distances . Generally, getting more frequent oil changes won't hurt your BMW. In fact, more frequent oil changes give technicians more opportunities to catch and alert you to any issues, like worn brake pads or a weak battery .

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 small but vital parts—they provide the electric spark that your car needs in order to start, and old spark plugs can prevent your car from starting at all . The 2018 BMW 640i xDrive Gran Coupe uses Bosch spark plugs as original equipment .

OEM Interval: Spark plugs are scheduled for replacement at 60,000 miles, with a repeat service at 120,000 miles .

Conservative Owner Guidance: Some service providers recommend replacing spark plugs on time or about every 30,000 miles .

Spark Plug Inspection: Check for abnormal pitting or charred plug ends when replacing. Any strange variations among plugs are a sure indicator that something is wrong with a particular cylinder.

Oxygen Sensor Service

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

Brake Fluid Service

Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of your braking system . The 2018 BMW 640i xDrive Gran Coupe uses DOT4 specification brake fluid .

Brake Fluid Specifications (DOT4):

• Dry Boiling Point: 280°C (536°F)
• Wet Boiling Point: 198°C (388°F)

OEM Guidance: Brake fluid deteriorates over time and eventually needs to be replaced with a brake system flush . If you notice that your brake fluid appears black or brown, it is well past time for a service . A brake system flush removes existing fluid and moisture out of the system and replaces it with new, clean, fluid . A brake fluid flush ensures proper brake system performance and increases the lifespan of your brake system components .

Conservative Owner Guidance: It is a good practice to change brake fluid every 24,000 miles or 36 months . Always use a fluid recommended by the vehicle manufacturer .

Brake System Service

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

Signs of Brake Issues:

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

xDrive-Specific Maintenance

The xDrive all-wheel-drive system includes both front and rear differentials. Differential oil should be checked for level and changed as per the owner's manual recommendation. The xDrive transfer case also requires periodic fluid service using BMW-approved transfer case fluid.

Fluid Specification: Pentosin fluids are approved for use in BMW vehicles, with certain fluids compatible with Lifeguard 8 for transmission applications .

Battery Care

Batteries generally need to be replaced every three to five years. Extremely hot or cold temperatures can take a toll on your BMW battery, and so can frequent short drives. If you keep driving on a battery that can't hold a charge, you run the risk of being stranded when your battery finally gives out. The battery registration process should be performed when replacing the battery to ensure proper charging characteristics.

Engine Tune-Up Signs

Pay attention to warning signs that your engine may need attention :

• Shaking while the engine is idling
• Poor fuel economy
• A lit check engine light on your dashboard
• A knocking sound when the engine is running

BMW Maintenance Program Coverage

The 2018 BMW 640i xDrive Gran Coupe was covered by BMW's standard maintenance program from the original in-service date. For vehicles beyond this coverage, owners should plan for out-of-pocket maintenance.

Long-Term Ownership Outlook

With proactive maintenance, a 2018 BMW 640i xDrive Gran Coupe could hit 200,000 miles (or beyond!) . Staying on track with routine service appointments can help your 640i xDrive Gran Coupe perform better, increase your vehicle safety, and help you avoid expensive repairs .

Regular maintenance is an investment that maintains the value and dependability of your car, extends its service life, and increases its resale value. Scheduled maintenance services can vary depending on driving conditions, climate, and other factors; however, recommended maintenance usually includes services like oil changes, tire rotations, brake pad replacement, filter changes, and fluid checks and exchanges .