2013 BMW 335i Complete Service & Maintenance Schedule

Key Takeaways

• CBS System: The 2013 BMW 335i uses the Condition Based Service (CBS) system. Sensors and algorithms monitor driving conditions to determine service requirements individually—there is no fixed schedule for most items. Service data is stored on your remote control key for your Service Advisor to read .
• Engine: The F30/F31 335i is powered by the N55 3.0-liter twin-scroll turbocharged inline-six engine. The 335i is available in both rear-wheel drive and xDrive (all-wheel drive) configurations .
• Oil Change Interval: BMW generally recommends oil service approximately every 10,000 miles or 12 months . Many independent specialists recommend a more conservative 5,000-mile interval for enhanced long-term engine health .
• Oil Specification: The N55 engine requires synthetic oil meeting BMW Longlife-01 (LL-01) approval. Common viscosities include 5W-30, 0W-30, and 5W-40. Capacity is approximately 6.5 liters with filter .
• Brake Fluid: BMW recommends brake fluid replacement every 2 years regardless of mileage .
• Spark Plugs: BMW recommends spark plug replacement at approximately 60,000 miles. For modified or aggressively driven vehicles, consider replacing spark plugs every 30,000–40,000 miles .
• Coolant: BMW-approved coolant replacement is recommended every 60,000 miles or 4 years .

Understanding BMW's Condition Based Service (CBS) System

The 2013 BMW 335i does not follow a traditional fixed-mileage maintenance schedule. Instead, it uses the Condition Based Service (CBS) system. Sensors and special algorithms take the different driving conditions of your BMW into account to determine current and future service requirements .

How CBS Works:

• Sensors track engine oil quality, brake pad wear, driving style, and trip length
• The system adapts service recommendations to your individual driving profile
• Service notifications appear on the Control Display when maintenance is due
• The system tracks multiple service items separately: engine oil, front and rear brake pads, brake fluid, vehicle check, and legally mandated inspections

Service Data in the Remote Control:

Your vehicle continuously stores service-requirement information in the remote control while you are driving. Your Service Advisor can read this data and propose an optimized maintenance approach .

Important: Make sure the date is always set correctly in your instrument cluster; otherwise, the effectiveness of Condition Based Service (CBS) is not assured .

Engine Oil Service

BMW Factory Schedule

The CBS system determines when your specific vehicle needs an oil service. BMW typically recommends oil service approximately every 10,000 miles or 12 months, whichever comes first .

Oil Specifications

The N55 engine requires synthetic oil meeting BMW Longlife-01 (LL-01) approval. Recommended viscosities include:

• 0W-30
• 5W-30
• 5W-40

The engine has a total oil capacity of approximately 6.5 liters (6.9 quarts) with filter . The OEM oil filter part number is 11427953129 .

Owner Guidance

Motor oil is the single most important element in keeping your engine healthy and helping it to enjoy a long life . Pelican Parts recommends changing synthetic motor oil every 5,000 miles and always replacing the filter when changing the oil .

For the N55 engine, independent specialists and experienced owners commonly recommend:

• Conservative approach: 5,000 miles for synthetic motor oil
• For modified or tracked vehicles: Oil changes every 5,000 miles are strongly recommended
• For vehicles over 80,000 miles: Consider switching to 5W-40 for increased protection

Oil Consumption Note: The N55 engine burns oil faster than average BMW engines, requiring top-ups between services .

Brake Fluid Service

BMW Factory Schedule

Brake fluid replacement is a time-based service. BMW recommends changing the brake fluid every 2 years regardless of mileage .

Why This Service Matters

Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. Contaminated fluid can lead to:

• Reduced boiling point, causing brake fade under heavy braking
• Internal corrosion of brake system components

Spark Plug Service

BMW Factory Schedule

BMW recommends spark plug replacement at approximately 60,000 miles .

Owner Guidance

The N55 engine's turbocharged design places demands on the ignition system:

• For modified vehicles: Replace spark plugs every 30,000 to 40,000 miles, or even sooner if the car is used on track
• For tuned vehicles: COBB Tuning recommends replacing spark plugs and coil packs every 30,000 miles in order to sustain peak performance with an aftermarket calibration

Symptoms of Worn Spark Plugs:

• Rough idling or misfires
• Reduced fuel economy
• Check Engine light illumination

Engine Air Filter Service

BMW Factory Schedule

BMW recommends replacing the engine air filter every 30,000 miles (45,000 km) . More frequent inspection and replacement may be needed if driving in dusty conditions .

Coolant System Service

BMW Factory Schedule

BMW recommends coolant replacement every 4 years or 60,000 miles .

Important: Always use BMW-approved coolant to prevent corrosion and maintain cooling efficiency .

Transmission Service

BMW Factory Schedule

For automatic transmissions, BMW does not specify a change interval, designating the fluid as "lifetime fill" for normal operation.

Owner Guidance

• Recommended interval: Replace automatic transmission fluid every 40,000 to 60,000 miles (65,000–96,000 km)
• Manual transmission: Fluid should also be replaced within this range

Periodic transmission fluid changes remove harmful abrasives and corrosive chemicals that can damage expensive drivetrain components .

Serpentine Belt Service

BMW Factory Schedule

The serpentine belt should be inspected every 30,000 miles for wear or cracks, and replaced as needed .

Signs of Wear:

• Cracking or fraying of the belt
• Squeaking or squealing noises from under the hood

N55 Engine Common Maintenance Considerations

Based on specialist experience, the N55 engine has several common maintenance concerns:

Carbon Build-Up (Intake Valve Deposits)

The N55 engine is a direct injection engine, which can lead to carbon deposits forming on the intake valves over time. Carbon cleaning (walnut blasting method) may be needed as early as 25,000 miles .

Charge Pipe

Charge pipes on N55 engines are more common to blow off of the throttle body. Upgrading to an aftermarket charge pipe is a common solution .

Turbo Oil Lines

Oil leaks on the N55 turbo can come from the oil lines. The braided stainless steel lines can develop leaks from inside the crimps, requiring replacement of the line .

General Service Recommendations Summary

The CBS system is the ultimate authority for your specific vehicle. The following summary provides context for common 2013 BMW 335i service patterns:

Frequently Asked Questions

1. How often should I change the oil in my 2013 BMW 335i?

The CBS system typically recommends oil service approximately every 10,000 miles or 12 months. Many independent specialists recommend a more conservative 5,000-mile interval for enhanced long-term engine protection, especially for modified or aggressively driven vehicles .

2. What oil does the 2013 BMW 335i require?

The N55 engine requires synthetic oil meeting BMW Longlife-01 (LL-01) approval. Common viscosities include 0W-30, 5W-30, and 5W-40. The engine capacity is approximately 6.5 liters with filter .

3. When should the brake fluid be replaced?

BMW recommends brake fluid replacement every 2 years regardless of mileage .

4. When should the spark plugs be replaced?

BMW recommends replacement at 60,000 miles. For modified or aggressively driven vehicles, consider replacing spark plugs every 30,000–40,000 miles .

5. What is the Condition Based Service (CBS) system?

CBS is BMW's maintenance system that uses sensors and algorithms to monitor driving conditions and calculate service needs. Service data is stored on your remote control key for your Service Advisor to read .

6. Does the 2013 BMW 335i use a timing belt or timing chain?

The N55 engine uses a timing chain designed for the life of the engine. Regular oil changes are critical for chain longevity.

7. When should the transmission fluid be changed?

BMW designates the automatic transmission fluid as "lifetime fill." Independent specialists recommend transmission fluid service every 40,000–60,000 miles .

8. What is the recommended coolant service interval?

BMW recommends coolant replacement every 4 years or 60,000 miles. Always use BMW-approved coolant .

9. What are common maintenance concerns on the N55 engine?

Common concerns include carbon buildup on intake valves, charge pipe failure, and oil leaks from turbo oil lines. Regular maintenance and proactive inspection can help prevent major issues .

10. Is the 2013 BMW 335i expensive to maintain?

Maintenance costs are above average for non-luxury vehicles but typical for premium German sports sedans. The N55 engine has specific maintenance considerations, but regular preventative maintenance is the key to extending the life of the vehicle.

*Always consult your vehicle's owner's manual and CBS system for the most accurate maintenance requirements for your specific 2013 BMW 335i. Maintenance needs may vary by production date, engine variant, and driving conditions.*