2018 maintenance schedule
2018 BMW 440i xDrive Gran Turismo Service Requirements & Maintenance Schedule
The 2018 BMW 440i xDrive Gran Turismo is equipped with BMW's Condition Based Service (CBS) system.
Last updated
November 5, 2026
Reviewed for service schedule clarity.
Key Takeaways
- Maintenance System: Your vehicle uses BMW's Condition Based Service (CBS) system, which monitors driving style and conditions to determine when service is needed rather than following a fixed schedule .
- Engine Oil: The B58 3.0-liter engine requires BMW Longlife-approved synthetic oil, with BMW LL-01 being a key approval. The engine has an approximate oil capacity of 6.5 liters with filter.
- Oil Change: Independent specialists recommend changing synthetic motor oil every 5,000 miles and always replacing the filter when changing the oil .
- Transmission Service: The ZF 8-speed automatic transmission should be serviced every 50,000 miles. For modified or track-driven vehicles, shorter 30,000-mile intervals are recommended .
- Brake Fluid: BMW recommends brake fluid replacement every 2 years. The vehicle requires DOT 4 specification brake fluid .
- Service Interval Warning: A service interval warning is standard equipment on this vehicle .
Understanding BMW's Condition Based Service System
The 2018 BMW 440i xDrive Gran Turismo is equipped with BMW's Condition Based Service (CBS) system. BMW's maintenance guidelines are sensor-driven and center around the CBS system that is cycled to occur every 10,000 miles, whether it involves a simple oil change or other standard service .
BMW utilizes electronic oil measurement to monitor the engine load on the current oil fill, based on driving style and distances. It is monitored on the vehicle's Control Display . The system adapts service recommendations to your specific driving profile.
BMW recommends that maintenance and repair work be performed by an authorized BMW service center or a workshop with trained personnel who follow BMW specifications .
Service Schedule Overview
The following intervals are based on BMW's maintenance system and specialist guidance. Your CBS system remains the ultimate authority for your specific vehicle .
| Service Item | Recommended Interval | Details |
|---|---|---|
| Engine Oil & Filter | CBS-driven (approx. 10,000 miles / 12 months) | B58 capacity: 6.5L; BMW LL-01 approved oil |
| Brake Fluid | Every 2 years | DOT 4 specification |
| Engine Air Filter | 60,000 miles | Replace as part of major service |
| Spark Plugs | 100,000 miles | 6 plugs required |
| Automatic Transmission Fluid | 50,000 miles (ZF recommendation) | 30,000 miles for modified/track use |
| Cabin Microfilter | Every 2 years | Maintains interior air quality |
| Coolant | 4 years or 60,000 miles | Use BMW-approved coolant |
Engine Oil & Filter Service
BMW Factory Schedule
BMW's CBS system determines the precise oil change interval based on driving style and conditions. Synthetic oil and oil filter changes typically occur every 10,000 miles or 12 months, whichever occurs first .
Oil Specifications
The 2018 BMW 440i xDrive Gran Turismo is powered by the B58 3.0-liter inline-six engine. Motor oil is the single most important element in keeping your engine healthy and helping it to enjoy a long life .
| Specification | Detail |
|---|---|
| Oil Capacity | 6.5 liters with filter |
| Required Approval | BMW Longlife-01 (LL-01) |
| Oil Standards | ACEA A3/B4, API SN/CF |
| Recommended Viscosity | 5W-30, 5W-40, or 0W-40 |
Approved oil brands include Castrol, which meets BMW LL-01, ACEA A3/B4, API SN/CF standards, and Total, which meets BMW LL-22 FE++ standards .
Owner Guidance
Pelican Parts recommends changing synthetic motor oil every 5,000 miles and always replacing the filter when changing the oil . This is a conservative approach to ensure long-term engine health, especially for modified or aggressively driven vehicles. Different engines and climates require specific oil viscosities; refer to your owner's manual for the correct specification for your vehicle .
Brake Fluid Service
BMW Factory Schedule
Brake fluid replacement is a time-based service tracked by the CBS system. BMW recommends brake fluid replacement every 2 years regardless of mileage .
Specification
The 2018 BMW 440i xDrive Gran Turismo requires DOT 4 brake fluid . Bosch brake fluid meets DOT 5.1, DOT 4, and DOT 3 specifications with a dry boiling point of 518°F and wet boiling point of 365°F .
Why Brake Fluid Service Matters
Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of your braking system . Brake fluid should be changed every time you service your brakes . Over time, brake fluid absorbs moisture from the air, which can:
- Reduce the boiling point, leading to brake fade under heavy braking
- Cause internal corrosion of brake system components
- Result in a spongy or soft brake pedal feel
Signs Brake Fluid Needs Service:
- Brake fluid appears dark, brown, or black
- Brake pedal feels spongy or soft
- Diminished braking performance
Spark Plug Service
BMW Factory Schedule
BMW technicians will change the spark plugs at the 60,000-mile service . The B58 engine requires six spark plugs.
Why Spark Plug Service Matters
Spark plugs are one of the key components of your vehicle's ignition system. They ignite gasoline and air inside your engine, providing the power to propel you down the road . Spark plugs are used to ignite the fuel-air mixture in the engine's combustion chamber . New spark plugs are a must for any good tune-up .
Weak ignition coils or worn spark plugs cause misfires, rough idle, hard starts, and poor mileage. New coils and plugs restore crisp throttle response and cleaner emissions .
Spark Plug Inspection: Check for abnormal pitting or charred plug ends when replacing plugs. Also check each plug against each other—any strange variations among plugs may indicate an issue with a particular cylinder .
Engine Air Filter Service
BMW technicians will change the engine air filter at the 60,000-mile service . The engine air filter filters incoming air fed to the engine. The filter should be replaced more frequently in dusty conditions.
Automatic Transmission Fluid Service
BMW Factory Schedule
BMW generally designates the automatic transmission fluid as "lifetime fill" for normal operation.
Owner Guidance (ZF Recommendation)
The 2018 BMW 440i xDrive Gran Turismo is equipped with a ZF 8-speed automatic transmission. The transmission is one of the most neglected service areas on a car . If left unserviced, the automatic transmission fluid will break down, causing the valve body and filter to become contaminated with deposits and sludge. This will lead to poor shifting, slipping, and ultimately, transmission failure .
As per ZF's recommendations, ECS Tuning suggests performing a full service on the 8HP automatic transmission every 50,000 miles. If your vehicle is modified and makes more power than stock or if your vehicle is regularly track-driven, shorter 30,000-mile service intervals are recommended .
Signs Transmission Service May Be Needed:
- Gears slipping when accelerating
- Hard shifting or difficulty getting into gear
- Dirty or contaminated transmission fluid
- Grinding sounds from the transmission
xDrive Drivetrain Service
The xDrive all-wheel-drive system includes a transfer case and front differential that require periodic fluid service in addition to the rear differential. While BMW may designate these as "lifetime fill" in some cases, many independent specialists recommend proactive fluid changes at major service intervals (typically around 60,000 miles) to ensure optimal AWD performance and longevity.
Cooling System Service
The 2018 BMW 440i xDrive Gran Turismo uses BMW-approved coolant. This specially formulated coolant cannot be mixed with cars that use HT-12 Anti-Corrosion Agent and should be used as a concentrate mixed only with distilled water .
Coolant replacement generally occurs every 4 years or 60,000 miles. This service prevents overheating and maintains engine temperature. Neglecting it can lead to serious engine damage .
General Service Recommendations Summary
| Service Item | OEM/General Interval | Conservative Guidance |
|---|---|---|
| Engine Oil & Filter | CBS-driven (approx. 10,000 miles) | 5,000 miles |
| Brake Fluid | Every 2 years | DOT 4 specification |
| Engine Air Filter | 60,000 miles | Inspect regularly |
| Spark Plugs | 100,000 miles | 100,000 miles |
| Transmission Fluid | 50,000 miles (ZF recommendation) | 30,000 miles for modified/track |
| Coolant | 4 years / 60,000 miles | Follow schedule |
| Transfer Case Fluid | As needed | Consider at major service intervals |
| Differential Fluid | As needed | Consider at major service intervals |
Frequently Asked Questions
1. How often should I change the oil in my 2018 BMW 440i xDrive Gran Turismo?
BMW's CBS system determines the interval based on your driving style. Many independent specialists recommend changing synthetic motor oil every 5,000 miles for optimal engine health . The B58 engine has an oil capacity of approximately 6.5 liters with filter.
2. What oil does the 2018 BMW 440i xDrive Gran Turismo require?
The B58 engine requires BMW Longlife-approved synthetic oil. BMW Longlife-01 (LL-01) is a key approval for this engine . Recommended viscosities include 5W-30, 5W-40, and 0W-40. Always refer to your owner's manual for the correct viscosity for your climate.
3. When should the brake fluid be replaced?
BMW recommends brake fluid replacement every 2 years regardless of mileage . The vehicle requires DOT 4 specification brake fluid . If the brake fluid appears dark, brown, or black, it is past due for service.
4. When should the spark plugs be replaced?
Spark plug replacement is typically recommended at 60,000 miles for most BMW models . The B58 engine requires 6 spark plugs. New coils and plugs restore crisp throttle response and cleaner emissions.
5. When should the transmission fluid be changed?
BMW generally designates the automatic transmission fluid as "lifetime fill." However, the transmission manufacturer, ZF, recommends a service every 50,000 miles. For modified or track-driven vehicles, shorter 30,000-mile intervals are recommended .
6. Does the xDrive system require additional maintenance?
Yes, the xDrive system has a transfer case and front differential that require fluid service at major intervals in addition to the rear differential. Consider these services at the 60,000-mile major service interval.
7. What is BMW's Condition Based Service (CBS) system?
CBS is BMW's intelligent maintenance system that uses sensors to monitor your driving style and conditions to determine when service is needed. Service data is stored on your remote control key and read by your service center. A service interval warning is standard equipment on this vehicle .
8. When should the coolant be replaced?
Coolant replacement generally occurs every 4 years or 60,000 miles . Always use BMW-approved coolant that is formulated for your vehicle.
9. When should the engine air filter be replaced?
BMW technicians will change the engine air filter at the 60,000-mile service . Replacement may be needed earlier in dusty conditions.
10. Is the 2018 BMW 440i xDrive Gran Turismo expensive to maintain?
Maintenance costs are typical for premium German performance cars. Regular preventative maintenance—including timely oil changes, brake fluid flushes, and scheduled service based on the CBS system—is essential for extending the vehicle's life and avoiding more costly repairs.
*Always consult your vehicle's owner's manual and the CBS system for the most accurate maintenance requirements for your specific 2018 BMW 440i xDrive Gran Turismo. Maintenance needs may vary by production date and driving conditions.*