2014 maintenance schedule
2014 BMW 428i Coupe Service Requirements & Maintenance Schedule
The 2014 BMW 428i Coupe is equipped with the Condition Based Service (CBS) system.
Last updated
September 29, 2026
Reviewed for service schedule clarity.
Key Takeaways
- CBS System: The 2014 BMW 428i Coupe uses the Condition Based Service (CBS) system. Sensors and special algorithms take into account the driving conditions of your vehicle to determine maintenance requirements, adapting to your individual driving profile .
- Oil Capacity: The N20 2.0-liter engine holds approximately 5.0 liters (5.28 quarts) of oil with a filter .
- Oil Specification: BMW approved viscosities include SAE 0W-40, 0W-30, 5W-40, and 5W-30, requiring BMW Longlife-01 (LL-01) approval . BMW LL-17FE+ is also an approved specification for this model .
- Brake Fluid: The vehicle requires DOT 4 specification brake fluid. Regular brake fluid changes are critical to prevent contamination and maintain braking performance . Dark or black fluid indicates it is past due for service .
- Service Intervals: The CBS system is the primary guide. As a general reference, the oil change is CBS-driven, spark plugs are recommended at every 6 oil changes (approximately 60,000 miles), and the cabin microfilter should be replaced every 2 oil changes .
Understanding BMW's Condition Based Service (CBS) System
The 2014 BMW 428i Coupe is equipped with the Condition Based Service (CBS) system. This system uses sensors and special algorithms to take into account the driving conditions of your vehicle. Based on this, Condition Based Service determines the maintenance requirements, adapting the amount of maintenance to your user profile .
Information on required maintenance is continuously stored in your remote control key. Your service center will read this data and suggest the right service procedures for your vehicle. Therefore, hand your service specialist the remote control with which the vehicle was driven most recently .
Storage periods during which the vehicle battery was disconnected are not taken into account. If this occurs, have a service center update the time-dependent maintenance procedures .
Engine Oil Service
Specification & Capacity
The N20 engine in the 2014 BMW 428i Coupe requires high-quality synthetic motor oil. The engine oil capacity is 5.0 liters with a filter .
Approved engine oils must meet BMW Longlife-01 (LL-01) or LL-17FE+ specifications . The following viscosity grades are approved :
- SAE 0W-40
- SAE 0W-30
- SAE 5W-40
- SAE 5W-30
Engine oil must meet or exceed API SM .
Service Interval
The oil change interval is determined by the CBS system and varies based on driving style, with typical intervals around 8,000 to 10,000 miles .
Brake Fluid Service
Specification
The 2014 BMW 428i Coupe requires DOT 4 specification brake fluid .
Why This Service Matters
Brake fluid is a hydraulic fluid specially formulated to withstand the extreme pressures and temperatures of your braking system . Over time and through normal use, brake fluid becomes contaminated. Dark or black brake fluid indicates significant contamination and reduced performance .
Spark Plug Service
Specification
The N20 engine uses NGK spark plugs with part reference SILZKBR8D8S. Specifications include :
- Center Electrode Tip Material: Iridium
- Center Electrode Core Material: Platinum
- Gap Size: 0.032 inches
- Hex Size: 0.55 inches
- Reach: 26.5 mm
- Thread Diameter: 12.00 mm
Service Interval
Spark plugs are recommended at approximately 60,000 miles (every 6 oil changes) .
Additional Service Recommendations
Cabin Microfilter
Replace the ventilation microfilter every 2 oil changes .
Engine Air Filter
Replace the engine intake air filter every 5 oil changes .
Transmission Fluid
The ZF GA8HP-45Z transmission has a "lifetime oil filling" designation from BMW . The transmission fluid capacity is 8.5 liters .
Rear Axle Fluid
The rear axle has a "lifetime oil filling" designation from BMW with a capacity of 0.8 liters .
General Service Recommendations Summary
| Service Item | Specification / Capacity | Service Interval |
|---|---|---|
| Engine Oil & Filter | BMW LL-01 or LL-17FE+, 5.0 liters | CBS-driven (approx. 8,000–10,000 miles) |
| Brake Fluid | DOT 4 | As indicated by CBS / condition |
| Spark Plugs | NGK SILZKBR8D8S, gap 0.032 in | Every 6 oil changes (approx. 60,000 miles) |
| Cabin Microfilter | - | Every 2 oil changes |
| Engine Air Filter | - | Every 5 oil changes |
Frequently Asked Questions
1. How do I know when my 2014 BMW 428i needs service?
The CBS system monitors your driving conditions and displays service requirements on the Control Display. Information is also stored on your remote control key, which your service center can read .
2. How much oil does the N20 engine take?
The N20 2.0-liter engine has an oil capacity of approximately 5.0 liters (5.28 quarts) with a filter .
3. What type of brake fluid does the 2014 BMW 428i require?
The vehicle requires DOT 4 specification brake fluid .
4. What spark plugs does the N20 engine use?
The engine uses NGK spark plugs with reference SILZKBR8D8S, featuring iridium center electrodes and a 0.032-inch gap .
5. When should the transmission fluid be changed?
BMW designates the ZF GA8HP-45Z transmission fluid as "lifetime oil filling" . Always consult your service center for professional guidance.
6. Why does my brake fluid appear dark or black?
Brake fluid darkens over time as it becomes contaminated with moisture and other debris. Dark fluid indicates it is past due for service .
*Always consult your vehicle's owner's manual and CBS system for the most accurate maintenance requirements for your specific 2014 BMW 428i Coupe. Maintenance needs may vary by production date and driving conditions.*