2014 maintenance schedule
2014 BMW 428i xDrive Convertible Service Requirements & Maintenance Schedule
The 2014 BMW 428i xDrive Convertible is equipped with the Condition Based Service (CBS) system.
Last updated
September 29, 2026
Reviewed for service schedule clarity.
Key Takeaways
- Condition Based Service (CBS) System: The 2014 428i xDrive Convertible uses CBS, an intelligent system that monitors driving conditions to determine when service is needed. Service data is stored on your remote control key .
- Oil Change: Pelican Parts recommends changing synthetic motor oil every 5,000 miles to maintain long-term engine health .
- Oil Specification: The N20 2.0-liter engine requires BMW Longlife-01 (LL-01) approved synthetic oil .
- Engine Oil Capacity: 5.0 liters .
- Brake Fluid: The vehicle requires DOT 4 specification brake fluid . Brake fluid should be changed as part of regular brake system service .
- Spark Plugs: NGK spark plugs are OEM equipment for this vehicle .
Understanding BMW's Condition Based Service (CBS) System
The 2014 BMW 428i xDrive Convertible is equipped with the Condition Based Service (CBS) system. This system uses sensors and algorithms to analyze your driving conditions and determine maintenance requirements based on your individual user profile .
Service Data Storage: Information on required maintenance is stored on your remote control key. Your service center can read this data to recommend appropriate service procedures .
Warranty Coverage: The 2014 model originally included a 48-month/50,000-mile Basic Warranty, Powertrain Warranty, and Maintenance Program .
Engine Oil & Filter Service
BMW Factory Schedule
The oil change interval is determined by the CBS system based on driving style and conditions. The engine is the N20B20 2.0-liter turbocharged inline-four .
Specifications
- Oil Capacity: 5.0 liters .
- Approval: BMW Longlife-01 (LL-01) .
- Oil Type: Synthetic motor oil .
Owner Guidance
Pelican Parts recommends changing synthetic motor oil every 5,000 miles and always replacing the filter with every oil change . Different engines and climates require specific oil viscosities; refer to your owner's manual for the correct viscosity .
Brake Fluid Service
BMW Factory Schedule
Brake fluid service is indicated by the CBS system as a time-based service.
Specification
The 2014 BMW 428i xDrive Convertible requires DOT 4 specification brake fluid . BMW also offers a low-viscosity formula for extreme braking conditions .
Owner Guidance
Brake fluid is a hydraulic fluid formulated to withstand extreme pressures and temperatures . It should be changed as part of regular brake system service .
Spark Plug & Ignition System Service
Specification
The 2014 BMW 428i xDrive Convertible uses NGK spark plugs as original equipment . The vehicle requires DELPHI ignition coils (part number 12138616153) and four are needed for the 4-cylinder engine .
Owner Guidance
Spark plugs are essential for igniting the fuel-air mixture in the engine's combustion chamber . Check for abnormal pitting or charred plug ends when replacing plugs, and compare each plug for variations that could indicate issues with a particular cylinder .
Drivetrain & Transmission Service
Specifications
The 2014 BMW 428i xDrive Convertible uses a ZF GA8HP45Z 8-speed automatic transmission . The xDrive all-wheel-drive system adds a transfer case and front differential requiring periodic fluid service in addition to the rear differential .
The Bentley Service Manual for the 2014-2016 BMW 4 Series covers maintenance procedures including xDrive transfer case fluid and ATF service .
General Service Recommendations Summary
| Service Item | Specification / Capacity | Recommended Interval |
|---|---|---|
| Engine Oil & Filter | BMW LL-01 approved; capacity 5.0 liters | CBS-driven (OEM); 5,000 miles (conservative) |
| Brake Fluid | DOT 4 specification | As indicated by CBS / brake service |
| Spark Plugs | NGK OEM | As indicated by major service interval |
| Ignition Coils | DELPHI OEM; 4 required | As indicated by major service interval |
| Automatic Transmission Fluid | ZF GA8HP45Z | Major service interval |
| xDrive Transfer Case Fluid | Per Bentley service manual | Major service interval |
Frequently Asked Questions
1. How often should I change the oil in my 2014 BMW 428i xDrive Convertible?
Pelican Parts recommends changing synthetic motor oil every 5,000 miles . The CBS system determines the specific interval based on your driving conditions.
2. How much oil does the N20 engine take?
The N20 2.0-liter engine has an oil capacity of 5.0 liters .
3. What type of brake fluid does the 2014 BMW 428i xDrive Convertible require?
The vehicle requires DOT 4 specification brake fluid .
4. What spark plugs does the 2014 BMW 428i xDrive Convertible use?
The vehicle uses NGK spark plugs as original equipment .
5. What is BMW's Condition Based Service (CBS) system?
CBS is BMW's maintenance system that uses sensors and special algorithms to determine service requirements based on actual driving conditions .
6. What transmission is in the 2014 BMW 428i xDrive Convertible?
The vehicle uses a ZF GA8HP45Z 8-speed automatic transmission .
7. Does the xDrive system require additional maintenance?
Yes, the xDrive all-wheel-drive system has a transfer case and front differential requiring periodic fluid service in addition to the rear differential .
8. What was the original warranty coverage?
The 2014 model originally included a 48-month/50,000-mile Basic Warranty, Powertrain Warranty, and Maintenance Program .
*Always consult your vehicle's owner's manual and CBS system for the most accurate maintenance requirements for your specific 2014 BMW 428i xDrive Convertible. Maintenance needs may vary by production date and driving conditions.*