2018 maintenance schedule
2018 BMW 440i Gran Coupe Complete Service & Maintenance Schedule
The 2018 BMW 440i Gran Coupe is equipped with BMW's Condition Based Service (CBS) system.
Last updated
November 5, 2026
Reviewed for service schedule clarity.
Key Takeaways
- Factory-Scheduled Maintenance: OEM documentation specifies key service intervals including brake fluid at 30,000-mile intervals, air filter replacement at 36,000-mile intervals, spark plugs at 100,000 miles, and automatic transmission fluid at 100,000 miles .
- Engine & Oil: The B58 engine requires BMW Longlife-17 FE+ approved 0W-20 oil with low-ash formulation compatible with modern catalytic converters. Oil capacity is approximately 6.5 liters.
- Transmission Service: The ZF 8-speed automatic transmission should be serviced every 50,000 miles according to the manufacturer's recommendations, despite BMW's "lifetime fill" position .
- Maintenance Program: The vehicle originally included a 3-year/36,000-mile maintenance program which has now expired for all 2018 models.
Understanding the BMW Maintenance System
The 2018 BMW 440i Gran Coupe is equipped with BMW's Condition Based Service (CBS) system. This sensor-driven system monitors your driving style, trip length, and engine load to determine when service is actually needed, rather than following a rigid fixed schedule.
Service notifications appear on the Control Display when maintenance is due. Information on required maintenance is stored on your remote control key and can be read by your BMW Service Advisor. 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 .
Factory Maintenance Schedule
Based on OEM documentation for the 2018 BMW 440i Gran Coupe, the following service intervals are specified :
| Distance (miles) | Action | Item |
|---|---|---|
| 30,000 (48,000 km) | Flush/replace | Brake fluid |
| 36,000 (57,600 km) | Replace | Engine air filter |
| 60,000 (96,000 km) | Flush/replace | Brake fluid |
| 72,000 (115,200 km) | Replace | Engine air filter |
| 90,000 (144,000 km) | Flush/replace | Brake fluid |
| 100,000 (160,000 km) | Replace | Spark plugs (6 required) |
| 100,000 (160,000 km) | Change | Automatic transmission fluid |
| 108,000 (172,800 km) | Replace | Engine air filter |
| 120,000 (192,000 km) | Flush/replace | Brake fluid |
| 120,000 (192,000 km) | Replace | Oxygen sensor |
| 144,000 (230,400 km) | Replace | Engine air filter |
| 150,000 (240,000 km) | Flush/replace | Brake fluid |
| 200,000 (320,000 km) | Replace | Spark plugs (6 required) |
| 240,000 (384,000 km) | Replace | Oxygen sensor |
| 300,000 (480,000 km) | Replace | Spark plugs (6 required) |
Engine Oil & Filter Service
BMW Factory Schedule
BMW's CBS system determines the precise oil change interval based on driving style and conditions. The system typically cycles every 10,000 miles, but this varies based on actual driving conditions.
Oil Specifications
The 2018 BMW 440i Gran Coupe is powered by the B58B30M0 3.0-liter turbocharged inline-six engine . The engine requires BMW-approved synthetic oil with the following specifications:
- Recommended Oil: BMW 0W-20 (LL-17 FE+) – factory-recommended for B58 engines
- Alternative Viscosities: 5W-30, 5W-40, or 0W-40 (must meet BMW Longlife approvals)
- Approved Specifications: BMW LL-17FE+, BMW LL-22 FE++, BMW LL-01
- Oil Capacity: Approximately 6.5 liters with filter
The BMW LL-17 FE+ 0W-20 oil is designed for high-efficiency B58 gasoline engines. It reduces drag and friction, improving fuel economy and emissions. The low-ash formulation is compatible with modern catalytic converters .
Owner Guidance
Motor oil is the single most important element in keeping your engine healthy. Many independent specialists recommend a more conservative oil change interval for long-term engine health:
- Standard approach: Follow the CBS system (approximately 10,000 miles or 1 year)
- Conservative approach: 5,000–7,500 miles, especially for aggressive or city driving, frequent short trips, or hot climates
Estimated Cost: An oil change for the 2018 BMW 440i Gran Coupe is estimated at approximately $280, with dealer prices ranging from $324 to $453 . Always replace the oil filter when changing the oil .
Brake Fluid Service
BMW Factory Schedule
OEM documentation specifies brake fluid flush and replacement at 30,000, 60,000, 90,000, 120,000, 150,000, 180,000, 210,000, 240,000, 270,000, and 300,000-mile intervals .
Fluid Specification
The 2018 BMW 440i Gran Coupe requires DOT 4 brake fluid . Bosch ESI6 is a compatible extended-service brake fluid that exceeds all current DOT standard requirements, with a typical dry boiling point of 518°F and wet boiling point of 365°F. It is suitable for modern brake systems featuring ABS and ESP . Pentosin DOT 4 LV is also an approved option offering extremely low viscosity at cold temperatures and superior corrosion resistance .
Why Brake Fluid Service Matters
Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of your braking system. 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
OEM documentation specifies spark plug replacement at 100,000 miles, with a second replacement at 200,000 miles and a third at 300,000 miles . The vehicle requires 6 spark plugs for the 6-cylinder B58 engine.
Specifications
The 2018 BMW 440i Gran Coupe uses spark plugs with the following specifications :
| Specification | Detail |
|---|---|
| Quantity | 6 plugs |
| Center Electrode Tip Material | Iridium |
| Ground Electrode Tip Material | Platinum |
| Gap Size | 0.8mm |
| Hex Size | 14mm BI-HEX |
| Thread Diameter | M12 x 1.25 |
| Heat Range | 8 |
Why Spark Plug Service Matters
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 . Even if only one spark plug is found to be faulty, they should always be replaced in sets. NGK spark plugs are specified as original equipment by the majority of the world's auto manufacturers .
Engine Air Filter Service
BMW Factory Schedule
OEM documentation specifies engine air filter replacement at 36,000, 72,000, 108,000, 144,000, 180,000, 216,000, 252,000, and 288,000-mile intervals . The engine air filter filters incoming air fed to the engine. The filter should be replaced more frequently in dusty conditions.
Fuel Filter Service
BMW Factory Schedule
Fuel filters are changed as part of routine maintenance to keep the fuel system clean and protected from contaminants . When fuel filters get clogged, they can cause all sorts of problems, including clogged injectors and contaminated fuel lines. Many times changing a fuel filter can make an old car run like new.
Automatic Transmission Fluid Service
BMW Factory Schedule
OEM documentation specifies changing the automatic transmission fluid at 100,000 miles . The automatic transmission fluid is used for lubricating and cooling the automatic transmission. The specified amount is 3.2 units.
Owner Guidance
The 2018 BMW 440i Gran Coupe 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 to ensure the transmission's fluid remains free from contamination .
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
Oxygen Sensor Service
BMW specifies oxygen sensor replacement at 120,000 miles, with a second replacement at 240,000 miles . The oxygen sensor relays air/fuel ratio information to the fuel control computer that allows the computer to make adjustments.
Timing Chain
The 2018 BMW 440i Gran Coupe uses a timing chain designed for the life of the engine . While the B58 engine has many fans, BMW does not always consider the "lifetime" of the car to be over 100,000 miles, so budget for replacement around then is worth considering. Regular oil changes are critical for chain longevity.
Cooling System Service
BMW recommends regular radiator maintenance as essential for long-term engine health . The radiator helps the engine temperature stay within a safe range. If you notice leaking coolant, overheating, or an illuminated low coolant dashboard light, have the cooling system inspected immediately.
General Service Recommendations Summary
| Service Item | OEM/General Interval | Conservative Guidance | Estimated Cost |
|---|---|---|---|
| Engine Oil & Filter | CBS-driven (approx. 10,000 miles) | 5,000–7,500 miles | $280–$453 |
| Brake Fluid | 30,000-mile intervals | Every 2 years | Varies |
| Engine Air Filter | 36,000-mile intervals | As indicated by CBS | Varies |
| Spark Plugs | 100,000 miles | 100,000 miles | Varies |
| Automatic Transmission Fluid | 100,000 miles (OEM) | 50,000 miles (ZF recommendation) | Varies |
| Fuel Filter | As needed | Inspect regularly | Varies |
| Oxygen Sensor | 120,000 miles | Follow schedule | Varies |
Frequently Asked Questions
1. How often should I change the oil in my 2018 BMW 440i Gran Coupe?
BMW's CBS system determines the interval based on your driving style, typically cycling every 10,000 miles or 12 months. Many independent specialists recommend a more conservative 5,000–7,500 mile interval for optimal engine health. An oil change is estimated at approximately $280, with dealer prices ranging from $324 to $453 .
2. What oil does the 2018 BMW 440i Gran Coupe require?
The B58 engine requires BMW Longlife-approved synthetic oil. BMW 0W-20 (LL-17 FE+) is a factory-recommended oil for B58 engines. Approved specifications also include BMW LL-22 FE++ and BMW LL-01. Always refer to your owner's manual for the correct viscosity for your climate.
3. When should the brake fluid be replaced?
OEM documentation specifies brake fluid flush and replacement at 30,000, 60,000, 90,000, and 120,000-mile intervals . If the brake fluid appears black or brown, it is past due for service. The vehicle requires DOT 4 brake fluid .
4. When should the spark plugs be replaced?
OEM documentation specifies spark plug replacement at 100,000 miles, with a second replacement at 200,000 miles and a third at 300,000 miles . The B58 engine requires 6 spark plugs.
5. When should the transmission fluid be changed?
OEM documentation specifies automatic transmission fluid change at 100,000 miles . However, the transmission manufacturer, ZF, recommends a service every 50,000 miles .
6. When should the engine air filter be replaced?
OEM documentation specifies engine air filter replacement at 36,000, 72,000, 108,000, 144,000, 180,000, 216,000, 252,000, and 288,000-mile intervals .
7. When should the oxygen sensor be replaced?
OEM documentation specifies oxygen sensor replacement at 120,000 miles, with a second replacement at 240,000 miles .
8. What was the original warranty coverage for the 2018 BMW 440i Gran Coupe?
The vehicle originally included a 4-year/50,000-mile basic and powertrain warranty, 144-month/unlimited-mile corrosion perforation warranty, 48-month/unlimited-mile roadside assistance, and a 3-year/36,000-mile maintenance program. This period has expired for all 2018 models.
*Always consult your vehicle's owner's manual and the CBS system for the most accurate maintenance requirements for your specific 2018 BMW 440i Gran Coupe. Maintenance needs may vary by production date and driving conditions.*