2018 BMW 750i Complete Maintenance Schedule & Service Guide

Key Takeaways

• The 2018 BMW 750i (G12 chassis) is powered by the N63R 4.4L twin-turbo V8 engine, with an oil capacity of 10.5 liters for xDrive models and 10.0 liters for rear-wheel-drive models .
• 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 .
• Major factory-scheduled maintenance milestones include spark plug replacement at 60,000 miles, oxygen sensor replacement at 120,000 miles (repeat at 150,000), and another spark plug service at 120,000 miles .
• For the N63R V8 engine, BMW recommends replacing spark plugs every 30,000–40,000 miles—earlier than the standard CBS interval for some engines .
• Brake system service is recommended at least once every 12,000 miles or 12 months, and brake pads typically last between 30,000 and 40,000 miles .
• Brake fluid should be flushed every 24,000 miles or 36 months, or when indicated by the CBS system .
• Wheel alignment should be checked approximately every 6,000 miles or 6 months .
• With proactive maintenance, a 2018 BMW 750i can achieve 200,000 miles or more .

Understanding BMW's Condition Based Service (CBS) System

The 2018 BMW 750i utilizes BMW's Condition Based Service (CBS) system, which uses onboard sensors and algorithms to calculate maintenance needs based on actual driving conditions rather than fixed intervals . This adaptive system monitors factors such as driving style, trip length, engine temperature, and component wear to determine when service is actually needed .

BMW's maintenance guidelines are sensor-driven and center around the CBS system, which is cycled to occur approximately every 10,000 miles . Service information is stored in the vehicle's remote key fob and can be read by your BMW service advisor .

Understanding CBS Warning Indicators:

• Green – No service needed
• Yellow – Service due soon; schedule an appointment
• Red – Immediate service required

Engine Specifications

The 2018 BMW 750i is equipped with the N63R 4.4L twin-turbo V8 engine (engine code N63B44) .

OEM Factory Maintenance Schedule

The following maintenance intervals represent key factory-recommended milestones for the 2018 BMW 750i. 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 engine healthy. The 2018 750i uses the N63R 4.4L twin-turbo V8 engine .

Critical Oil Capacity Note: BMW issued a technical bulletin correcting the engine oil capacity. For rear-wheel-drive models, the correct capacity is 10.0 liters. For xDrive models, the correct capacity is 10.5 liters .

Oil Specifications:

• BMW-approved synthetic oil (BMW 0W30 is specified for the N63R engine)
• Common viscosity: 0W-30 or 5W-30
• Always replace the oil filter when changing your oil

Oil Change Guidance:

BMW's CBS system determines the optimal oil change interval based on driving conditions. Your 750i may need an oil change sooner if:

• The check engine/oil change light is on
• You hear knocking sounds from the engine
• You sense an oil smell in the cabin
• You see an excess amount of vehicle exhaust

Conservative Owner Guidance: 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 . Always use BMW-approved synthetic oil with the correct capacity for your drivetrain configuration .

Estimated Service Cost: An oil change for the 2018 BMW 750i is estimated at approximately $250–$450 depending on location and service provider, including parts and labor .

Spark Plug Service

The N63R V8 engine uses high-performance spark plugs to ignite the fuel-air mixture. The 2018 BMW 750i uses 8 spark plugs .

Service Interval: For N63R V8 engines, BMW recommends replacing the spark plugs every 30,000–40,000 miles . This is a critical maintenance interval, especially if your BMW has been tuned for increased performance .

OEM Spark Plug Part Number: Genuine BMW spark plug part number 12120057704 (12-12-0-057-704) is specified for the N63R engine .

Spark Plug Guidance:

Spark plugs are key to the performance and efficiency of your BMW engine . A bad plug(s) will harm performance and fuel mileage and affect drivability and engine smoothness . Unburnt fuel in the exhaust will shorten the lifespan of oxygen sensors and catalytic converters .

Ignition Coils: Ignition coils can last 80,000–100,000 miles, but can also fail much sooner. Proactive replacement is recommended by the 90,000-mile mark .

Symptoms of Faulty Spark Plugs:

• Shaking while the engine is idling
• Poor fuel economy
• Engine knocking
• Illuminated check engine light
• Misfiring

Estimated Replacement Cost: Approximately $400–$600 for parts and labor, with OEM parts included in the ignition service package .

Oxygen Sensor Service

Service Interval: Oxygen sensors are scheduled for replacement at 120,000 miles, with a repeat service at 150,000 miles . Replacement helps maximize fuel economy and minimize exhaust pollution.

Brake Fluid Service

Brake fluid service is a critical safety item. BMW recommends brake fluid replacement every 24,000 miles or 36 months .

Fluid Specification: BMW-approved brake fluid .

Signs Brake Fluid Needs Attention:

• Brake fluid appears black or brown, indicating contamination
• Brake pedal feels spongy
• Diminished brake system performance

Brake System Flush: A brake system flush removes existing fluid and moisture from 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 .

Estimated Service Cost: A brake system flush for the 2018 BMW 750i is estimated at approximately $166–$244 .

Brake System Service

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

Brake Pad Life: Brake pads often last 30,000 to 40,000 miles depending on driving style and conditions . If you drive mostly on the highway and tend to brake smoothly, your brake pads may last longer . Riding the brakes and hauling heavy loads can shorten their useful life .

Signs of Brake Issues:

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

Free Brake Inspection: Many service centers offer a complimentary brake check to help owners stay ahead of serious problems .

Wheel Alignment

Recommended Interval: Wheel alignment should be checked approximately every 6,000 miles or 6 months, whichever comes first .

Signs Alignment May Need Attention:

• A feeling that your car pulls to one side
• Excessive wear on only one tire
• A steering wheel that feels off center or crooked while driving straight
• Tires that squeal frequently

Unlike with other potential issues, you won't see any dashboard warning lights in your 750i if your wheel alignment needs attention .

Transmission Service

According to BMW, your 750i's transmission should be inspected routinely, and transmission fluids should be exchanged at regular intervals with BMW-approved products .

Recommended Interval: A general rule of thumb is to have your transmission fluid checked and changed about every 30,000 to 60,000 miles, but that timeline can change depending on how you use your BMW .

Transmission Warning Signs:

• Shifting delays
• Grinding or jumping during acceleration
• Car shaking on the road
• Burning smell or whistling sounds from under the hood
• Decreased fuel economy

Transmission Fluid Service: Changing the transmission fluid is a scheduled maintenance item . The process typically includes draining the transmission fluid, replacing the filter, and refilling with fresh, new fluid .

Estimated Service Cost: A transmission fluid change for the 2018 BMW 750i is estimated at approximately $330–$432 .

Transmission Fluid Leak: Transmission fluid can leak over time and potentially cause transmission issues . Worn or damaged seals, a loose or damaged transmission pan, or a cracked transmission housing could cause leaks .

Drivetrain Service

The drivetrain transfers power from your engine to the wheels and includes the transmission, driveshaft, differential, and axles .

Signs of Drivetrain Damage:

• Resistance when turning
• Heavy vibrations in your floorboards
• Clunks when shifting
• Vibration as your vehicle accelerates

Differential Service: Differential service frequency varies from car to car . It is recommended to get your differential inspected and the differential fluid changed as a part of your regular vehicle maintenance routine, since your vehicle cannot function without a differential .

Drivetrain Repair Costs: Smaller differential fixes, like seal or gasket replacement, can lean toward being more affordable . Big repairs, like bearing or gear replacement, can be a little more expensive since the labor is much more intensive .

Fuel Filter Service

Fuel filters are typically changed every 20,000 to 40,000 miles as part of the BMW maintenance schedule.

Battery Care

Batteries generally need to be replaced every three to five years. Your 750i may need a replacement sooner depending on your driving habits and climate. Extremely hot or cold temperatures can take a toll on your BMW battery, and so can frequent short drives .

Battery Warning Signs:

• Slow engine crank when starting
• Dim headlights
• Illuminated battery warning light

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.

Engine Tune-Up Signs

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

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

Periodic tune-ups can bring more power back to your 750i's engine . Tune-ups give your engine a boost in efficiency, so you can enjoy improved fuel economy and lower emissions.

Long-Term Ownership Outlook

With proper and diligent maintenance, a 2018 BMW 750i could be on the road well past the 200,000 mile mark . Staying on track with routine service appointments can help your 750i perform better, keep you safer on the road, 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 . Good maintenance should never be viewed as an expense—it is an investment in the longevity and reliability of your BMW.