2007 maintenance schedule
2007 BMW 335xi Service Schedule & Maintenance Guide
The 2007 BMW 335xi (E90/E91/E92) represents BMW's first mass-produced turbocharged gasoline engine—the N54.
Last updated
August 24, 2026
Reviewed for service schedule clarity.
Key Takeaways
- Engine & Drivetrain: The 2007 BMW 335xi is powered by the N54 3.0-liter twin-turbo inline-six engine, with xDrive all-wheel-drive adding a transfer case and front differential requiring periodic fluid service.
- Free Maintenance: The 2007 model included Free Scheduled Maintenance for 48 months or 50,000 miles, which has since expired for all examples .
- Oil Change: BMW's Condition Based Service (CBS) system determines the interval. Independent specialists recommend changing synthetic motor oil every 5,000–7,500 miles for the N54 engine.
- Spark Plugs: BMW specifies spark plug replacement at 45,000 miles for the 2007 335xi .
- Brake Fluid: BMW recommends brake fluid replacement at 30,000 miles (24 months), then every 30,000 miles thereafter .
- Transmission Fluid: BMW specified an "Extended Service Interval" for transmission fluid, with service recommended at 100,000 miles .
- Oxygen Sensor: Replacement is recommended at 120,000 miles .
Understanding the 2007 BMW 335xi
The 2007 BMW 335xi (E90/E91/E92) represents BMW's first mass-produced turbocharged gasoline engine—the N54. The "xi" (or xDrive) designation means this vehicle sends power to all four wheels, adding a transfer case and front differential to the drivetrain that require periodic fluid service in addition to the rear differential.
Warranty Coverage: The 2007 BMW 335xi originally included a 48-month/50,000-mile basic warranty and Free Scheduled Maintenance for 48 months or 50,000 miles .
Factory Maintenance Schedule
Based on OEM documentation for the 2007 BMW 335xi, the following service intervals are specified :
| Mileage | Service Item | Notes |
|---|---|---|
| 30,000 miles (48,000 km) | Brake Fluid | Flush and replace (24-month interval) |
| 45,000 miles (72,000 km) | Spark Plugs | Replace (six plugs required) |
| 60,000 miles (96,000 km) | Brake Fluid | Flush and replace (48-month interval) |
| 90,000 miles (144,000 km) | Spark Plugs | Replace (six plugs required) |
| 90,000 miles (144,000 km) | Brake Fluid | Flush and replace (72-month interval) |
| 100,000 miles (160,000 km) | Automatic Transmission Fluid | Change |
| 120,000 miles (192,000 km) | Oxygen Sensor | Replace |
| 120,000 miles (192,000 km) | Brake Fluid | Flush and replace (96-month interval) |
| 135,000 miles (216,000 km) | Spark Plugs | Replace (six plugs required) |
Engine Oil Service
BMW Factory Schedule
BMW's Condition Based Service (CBS) system monitors your driving conditions to determine the oil change interval. The N54 engine requires BMW Longlife-01 approved synthetic oil.
Oil Specifications
- Viscosity: 5W-30 is the recommended grade
- Capacity: Approximately 6.5–6.9 liters (6.9 quarts) with filter
- Approval: BMW LL-01
- Filter: Always replace the oil filter when changing oil
Cost Estimate
An oil change for a 2007 BMW 335xi is estimated at approximately $247–$283, with parts costing $186–$193 and labor $61–$90 . A second source estimates $266–$309 for the service .
Owner Guidance
Motor oil is the single most important element in keeping your engine healthy. Independent specialists strongly recommend a proactive approach, with many suggesting changing synthetic motor oil every 5,000–7,500 miles for the N54 engine, especially for vehicles driven aggressively or modified.
Brake Fluid Service
BMW Factory Schedule
BMW specifies brake fluid replacement every 30,000 miles (or 24 months), then again at 60,000 miles, 90,000 miles, 120,000 miles, and every 30,000 miles thereafter .
Why This Service Matters
Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. Contaminated fluid appears dark or black and can lead to:
- Reduced boiling point, causing brake fade under heavy braking
- Internal corrosion of brake system components
- A spongy or soft brake pedal feel
A brake system flush removes the contaminated fluid and moisture and replaces it with new, clean fluid to ensure proper brake system performance.
Spark Plug Service
BMW Factory Schedule
BMW specifies spark plug replacement at 45,000 miles, then again at 90,000 miles, 135,000 miles, and every 45,000 miles thereafter .
Specifications
- Quantity: Six spark plugs
- Gap: 0.027 inches (0.7 mm)
- Hex Size: 14 mm
- Heat Range: 6
Transmission Fluid Service
BMW Factory Schedule
BMW specified an "Extended Service Interval" for the transmission fluid . The OEM schedule specifies automatic transmission fluid change at 100,000 miles .
100,000-Mile Service
The 100,000-mile service for the 2007 BMW 335xi includes :
- Front brake pads replacement
- Oil and filter change
- Transmission fluid service
- Automatic transmission fluid service
- Instrument panel gauge check
Estimated Cost: $331 (independent shop) to $519 (dealer) .
96,000-Mile Service
The 96,000-mile service is a comprehensive inspection service including :
- Air filter replacement
- Cabin air filter replacement
- Oil and filter change
- Battery/cable service
- Comprehensive system checks (brakes, steering, suspension, hoses, fluids, lights, tires)
Estimated Cost: $416 (independent shop) to $546 (dealer) .
xDrive Drivetrain Service
The xDrive system adds a transfer case and front differential. Differential fluid should be changed every 30,000 to 50,000 miles . The estimated cost for differential fluid replacement is approximately $208–$276 .
N54 Engine Considerations
The N54 twin-turbo engine in the 2007 335xi has specific maintenance considerations:
- Carbon Build-Up: Direct injection can cause carbon deposits on intake valves, requiring walnut blasting cleaning potentially as early as 25,000 miles
- High-Pressure Fuel Pump: Known failure point on early N54 engines
- Water Pump: Electric water pump failure is common; cost for replacement is estimated at $1,814–$3,207
Cost Overview
Based on service data, here are estimated costs for common services :
| Service | Estimated Cost |
|---|---|
| Oil Change | $247–$309 |
| Brake Fluid Flush | ~$166 (indep.) to $215–$258 (dealer) |
| Differential Fluid | $208–$276 |
| Serpentine Belt | $362–$551 |
| Water Pump | $1,814–$3,207 |
Frequently Asked Questions
1. How often should I change the oil in my 2007 BMW 335xi?
The CBS system determines the interval based on driving conditions. Independent specialists recommend changing synthetic motor oil every 5,000–7,500 miles for the N54 engine. Oil capacity is approximately 6.5–6.9 liters with filter .
2. What oil does the 2007 BMW 335xi require?
The N54 engine requires synthetic oil meeting BMW Longlife-01 approval. Recommended viscosity is 5W-30 .
3. When should the spark plugs be replaced?
BMW specifies spark plug replacement at 45,000 miles, then every 45,000 miles thereafter . The engine requires six plugs with a gap of 0.027 inches (0.7 mm).
4. When should the brake fluid be replaced?
BMW specifies brake fluid replacement every 30,000 miles (or 24 months), then every 30,000 miles thereafter .
5. When should the transmission fluid be changed?
BMW specified an "Extended Service Interval" with automatic transmission fluid service at 100,000 miles .
6. Does the xDrive system require additional maintenance?
Yes, the xDrive all-wheel-drive system has a transfer case and front differential that require periodic fluid service. Differential fluid should be changed every 30,000 to 50,000 miles .
7. What was the warranty coverage for the 2007 BMW 335xi?
The 2007 BMW 335xi originally included Free Scheduled Maintenance for 48 months or 50,000 miles . This has expired for all examples.
8. What is the 100,000-mile service for the 2007 BMW 335xi?
The 100,000-mile service includes front brake pad replacement, oil and filter change, transmission fluid service, and instrument panel gauge checks . Estimated cost is $331–$519.
9. What is the annual maintenance cost for a 2007 BMW 335xi?
The estimated annual maintenance cost is approximately $804 , with individual service costs ranging from $105 to $3,342.
10. Is the 2007 BMW 335xi expensive to maintain?
Maintenance costs are above average for non-luxury vehicles but typical for premium German performance cars. The N54 engine has specific maintenance considerations, and regular preventative maintenance is key to extending vehicle life.
*Always consult your vehicle's owner's manual and CBS system for the most accurate maintenance requirements for your specific 2007 BMW 335xi. Maintenance needs may vary by production date and driving conditions.*