2013 BMW 335is Coupe Complete Maintenance Schedule & Service Guide

Key Takeaways

• Engine & Performance: The 2013 BMW 335is Coupe is powered by the N54 twin-turbo 3.0-liter inline-six engine. The "is" designation signifies a performance-oriented variant, typically featuring a more powerful engine tune, enhanced cooling, upgraded brakes, and often the optional M-DCT (Dual Clutch Transmission) .
• Spark Plugs – Critical Difference: For the 335is, BMW specifies spark plug replacement at 45,000 miles—a shorter interval than the standard 335i's 60,000-mile interval . For modified or tuned vehicles, specialists recommend replacing spark plugs and coil packs every 30,000 miles .
• Oil Change: A 5W-30 or 5W-40 synthetic oil meeting BMW Longlife-01 approval is required. Many specialists recommend changing synthetic motor oil every 5,000 miles for the N54 engine .
• Brake Fluid: BMW recommends changing the brake fluid every 30,000 miles (or every 2 years) .
• Transmission Service: BMW specifies automatic transmission fluid service at 100,000 miles .
• Water Pump: Water pump failure is a known issue on N54/N55 models and is often considered a preventative maintenance item, with replacement recommended around 50,000–60,000 miles .
• Carbon Cleaning: Carbon cleaning (walnut blasting) is needed as early as 25,000 miles depending on driving conditions .
• Free Maintenance: The 2013 BMW 335is included Free Scheduled Maintenance for 48 months or 50,000 miles. This period has expired for all examples.

Understanding Your 2013 BMW 335is Maintenance Schedule

The 2013 BMW 335is Coupe is a performance-focused variant of the E92 3 Series, running from 2011 through 2013. It is distinguished from the standard 335i by its more powerful engine tune, upgraded cooling, sports exhaust, and the optional M-DCT dual-clutch transmission . While it is equipped with BMW's Condition Based Service (CBS) system to determine service needs dynamically , the performance nature of the vehicle benefits from a more proactive maintenance approach.

The following table summarizes key service intervals based on OEM documentation and specialist guidance:

2013 BMW 335is Coupe Service Schedule

Engine Oil Service

BMW Factory Schedule

The CBS system determines the precise oil change interval based on your driving conditions. BMW's maintenance guidelines are sensor-driven and center around the CBS system.

Oil Specifications

The N54 engine requires synthetic motor oil meeting BMW Longlife-01 approval. Common viscosities include:

• 5W-30
• 5W-40

Oil Capacity: Approximately 6.5 liters with filter.

Oil Filter: Use OEM or OEM-equivalent filters.

Specialist 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 modified vehicles, COBB Tuning recommends being aggressive with all factory recommended maintenance intervals .

Spark Plug & Ignition System Service

BMW Factory Schedule – Critical Difference

Important: For the 2013 BMW 335is, BMW specifies spark plug replacement at 45,000 miles . This is a shorter interval than the standard 335i's 60,000-mile interval.

Specialist Guidance

For modified or tuned vehicles, COBB Tuning recommends replacing spark plugs and ignition coil packs every 30,000 miles in order to sustain peak performance with an aftermarket calibration .

Signs of Worn Spark Plugs:

• Difficulty starting
• Misfiring or rough running
• Reduced fuel economy
• Check Engine light

Estimated Cost: Spark plug replacement for a 2013 BMW 335is is estimated at approximately $356 at a shop, with dealer prices ranging from $398 to $515 .

Brake Fluid Service

BMW Factory Schedule

BMW recommends brake fluid flush and replacement at 30,000 miles .

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, and internal corrosion of brake system components.

Transmission Service

BMW Factory Schedule

BMW specifies automatic transmission fluid service at 100,000 miles .

Specialist Guidance

The 335is may feature BMW's optional M-DCT (Dual Clutch Transmission). For DCT-equipped vehicles, more frequent fluid service may be recommended. The transmission is one of the most neglected service areas on a car. Fluid and filter changes at recommended intervals remove harmful abrasives and corrosive chemicals that can damage expensive drivetrain components.

Engine Air Filter Service

BMW recommends air filter replacement at 36,000 miles .

Cooling System – Water Pump

Water pump failure is common with BMW N54/N55 models and is often considered a preventative maintenance item . For N54 engines, water pump replacement is recommended around 50,000–60,000 miles .

Symptoms of Water Pump Failure:

• Rising coolant temperatures
• Coolant leaks under the vehicle
• Dashboard warning indicating overheating

N54 Engine Carbon Build-Up (Walnut Blasting)

The N54 engine is direct-injected, which can cause carbon deposits to accumulate on intake valves. This can lead to performance degradation, rough running, and misfires .

Specialist Guidance:

• Carbon cleaning may be needed as early as 25,000 miles depending on driving conditions
• Physical inspection requiring removal of the intake manifold is needed to assess buildup
• Dealerships may charge upwards of $1,000 for this carbon removal service

45,000-Mile Service

The 45,000-mile service for the 2013 BMW 335is is a key maintenance milestone. This service includes :

• Spark plugs replacement
• Oil and filter change
• Battery/cable service
• Comprehensive system checks (brakes, steering, suspension, fluids, lights, tires)

Estimated Cost: The 45,000-mile service is estimated at approximately $586 (independent shop) to $743 (dealer) .

Frequently Asked Questions

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

Pelican Parts recommends changing synthetic motor oil every 5,000 miles . For modified vehicles, COBB Tuning recommends being aggressive with all factory recommended maintenance intervals .

2. What oil does the 2013 BMW 335is Coupe require?

The N54 engine requires synthetic oil meeting BMW Longlife-01 approval. Common viscosities include 5W-30 and 5W-40. Refer to your owner's manual for the correct viscosity for your climate.

3. When should the spark plugs be replaced?

Critical: BMW specifies spark plug replacement at 45,000 miles for the 335is . For modified vehicles, specialists recommend replacement every 30,000 miles .

4. When should the brake fluid be replaced?

BMW recommends brake fluid replacement at 30,000 miles .

5. When should the transmission fluid be changed?

BMW specifies automatic transmission fluid service at 100,000 miles .

6. What is carbon build-up, and does it affect my 335is?

The N54 engine is direct-injected, which can cause carbon deposits on intake valves. This may require cleaning (walnut blasting) as early as 25,000 miles, depending on driving conditions .

7. When should the water pump be replaced?

Water pump failure is common on N54 engines. Replacement is recommended as a preventative maintenance item around 50,000–60,000 miles .

8. Is the 2013 BMW 335is Coupe expensive to maintain?

Maintenance costs are above average for non-luxury vehicles but typical for premium high-performance German cars. The 335is has specific maintenance considerations including more frequent spark plug replacement and potential carbon cleaning. The estimated annual maintenance cost is approximately $857 .

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