2018 maintenance schedule
2018 BMW 740i Complete Maintenance Schedule & Service Guide
The 2018 BMW 740i utilizes BMW's Condition Based Service (CBS) system, which dynamically determines maintenance requirements based on actual driving...
Last updated
November 7, 2026
Reviewed for service schedule clarity.
Key Takeaways
- The 2018 BMW 740i is powered by a 3.0L turbocharged inline-six engine (B58) with an oil capacity of 6.5 liters and requiring 0W-20 viscosity oil .
- Scheduled maintenance is determined by BMW's Condition Based Service (CBS) system, which calculates intervals based on actual driving conditions rather than fixed mileage .
- The primary factory-scheduled maintenance milestones are at 60,000 miles (spark plugs), 120,000 miles (spark plugs and oxygen sensors), and 150,000 miles (oxygen sensors) .
- Brake system service is recommended at least once every 12,000 miles or 12 months, with brake pads typically lasting between 30,000 and 40,000 miles .
- Wheel alignment should be checked approximately every 6,000 miles or 6 months .
Understanding BMW's Condition Based Service (CBS) System
The 2018 BMW 740i utilizes BMW's Condition Based Service (CBS) system, which dynamically determines maintenance requirements based on actual driving conditions rather than fixed schedules . Service data is stored in the vehicle's remote key fob, which can be read by your BMW service advisor to generate a customized maintenance checklist based on your specific driving patterns .
CBS-monitored service items include:
- Engine oil
- Brake pads (front and rear separately)
- Brake fluid
- Spark plugs
- Vehicle check
Factory Maintenance Schedule
The following maintenance intervals represent key factory-recommended milestones for the 2018 BMW 740i :
| Mileage | Service Item |
|---|---|
| 60,000 Miles | Replace Spark Plugs |
| 120,000 Miles | Replace Oxygen (O2) Sensor; Replace Spark Plugs |
| 150,000 Miles | Replace Oxygen (O2) Sensor |
Engine Oil and Filter Change
The 2018 740i uses the B58 3.0L turbocharged inline-six engine .
Oil Specifications:
- Capacity: 6.5 liters with filter
- Viscosity: 0W-20 (all temperatures)
- Oil Drain Plug Torque: 18 ft/lbs; replace drain plug seal
- BMW-approved synthetic oil
BMW recommends changing your 2018 740i's oil at regular intervals as determined by the CBS system . Your 740i may need an oil change sooner if:
- The check engine 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
More frequent oil changes may be needed if you regularly haul heavy loads, drive in dusty conditions, or drive at low speeds for long distances .
Spark Plug Service
Service Interval: Spark plugs are recommended for replacement at 60,000 miles, with a repeat service at 120,000 miles . For the 740i, spark plug replacement is connected to the Engine Oil Service and is scheduled approximately every 60,000 miles .
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 System Service
BMW recommends that front and rear brakes are removed and serviced at least once every 12,000 miles or 12 months, including inspection of the parking brake .
Brake Pad Life: Brake pads typically last between 30,000 and 40,000 miles . Factors like frequent highway driving and smooth braking can help brake pads last longer. Hauling heavy loads and riding your brakes 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
Brake Fluid Service
BMW recommends brake fluid replacement every 2 years or when specified by the CBS system . Brake fluid is hygroscopic—it absorbs moisture from the atmosphere over time, which lowers its boiling point and compromises braking performance.
Wheel Alignment
It is generally recommended to have wheel alignment checked approximately every 6,000 miles or 6 months .
Signs Alignment May Need Attention :
- A feeling that your car pulls to one side
- Rapid or uneven tire wear
- 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 if your wheel alignment needs attention .
Engine Tune-Up Signs
Pay attention to warning signs that your engine may need attention :
- Stalling or shaky idling when you're stopped
- Diminished fuel economy
- Knocking noises in the engine
- A lit check engine light on your dashboard
Long-Term Ownership Outlook
With proper and diligent maintenance, a 2018 BMW 740i has a good chance of hitting 200,000 miles or more . Staying on track with routine service appointments is one of the best ways to help extend your 740i's life, increase your vehicle safety, and prevent common problems .
Regular maintenance is an investment that maintains the value and dependability of your car, extends its service life, and increases its resale value.
Maintenance questions
2018 BMW 740i FAQs
How often should I change the oil in my 2018 BMW 740i?+
BMW's Condition Based Service system determines the optimal oil change interval based on driving conditions . The B58 engine has an oil capacity of 6.5 liters and requires 0W-20 BMW-approved synthetic oil . Independent specialists recommend changing synthetic motor oil every 5,000 miles for optimal engine protection.
What type of oil does the 2018 BMW 740i use?+
The 2018 BMW 740i requires BMW-approved synthetic oil. The recommended viscosity is 0W-20 (all temperatures) . The oil capacity with filter is 6.5 liters .
When should spark plugs be replaced?+
Spark plugs are recommended for replacement at 60,000 miles, with a repeat service at 120,000 miles . Replacing spark plugs on time helps maintain engine performance, fuel economy, and reliable starting.
When should oxygen sensors be replaced?+
Oxygen sensors are scheduled for replacement at 120,000 miles, with a repeat service at 150,000 miles .
How often should brakes be serviced?+
BMW recommends that brakes are serviced at least once every 12,000 miles or 12 months, including inspection of the parking brake . Brake pads typically last between 30,000 and 40,000 miles depending on driving habits .
How often should wheel alignment be checked?+
Wheel alignment should be checked approximately every 6,000 miles or 6 months . Signs that alignment may need attention include pulling to one side, uneven tire wear, a crooked steering wheel, or squealing tires.
What is Condition Based Service (CBS)?+
CBS is BMW's adaptive maintenance system that uses sensors and algorithms to calculate maintenance needs based on actual driving conditions rather than fixed intervals . Service information is stored in the remote key fob, which your service center reads to determine the appropriate service procedures.
What are signs my BMW needs an engine tune-up?+
Signs include stalling or shaky idling when stopped, diminished fuel economy, knocking noises in the engine, or an illuminated check engine light . Spark plug replacement is a key part of an engine tune-up.
How long can a 2018 BMW 740i last?+
With proactive maintenance, a 2018 BMW 740i has a good chance of hitting 200,000 miles or more . Regular maintenance is key to achieving high mileage.