2009 BMW 750Li Maintenance Schedule & Service Intervals

Key Takeaways

• The 2009 BMW 750Li is an F02-generation long-wheelbase sedan powered by the N63 4.4-liter twin-turbocharged V8 engine, with a confirmed oil capacity of 9.0 liters (9.5 quarts) per BMW service documentation .
• Spark plugs are scheduled for replacement at 60,000 miles and again at 120,000 miles, with BMW recommending this interval since the N63 engine's introduction .
• Automatic transmission fluid has a documented replacement interval of 100,000 miles for the 2009 model .
• Oxygen sensors are scheduled for replacement at 120,000 miles and again at 150,000 miles .
• Brake fluid should be replaced based on condition; BMW's general guidance for this era suggests replacement at approximately 30,000-mile marks, then every 60,000 miles thereafter .
• A BMW Technical Service Bulletin confirms the N63 engine oil capacity as 9.5 quarts (9.0 liters), though note that xDrive models may have different specifications depending on the specific N63 variant .

Introduction: Understanding Your 2009 750Li's Service Requirements

The 2009 BMW 750Li is the extended-wheelbase flagship of the F02-generation 7 Series, powered by the N63 4.4-liter twin-turbocharged V8 engine. This generation, produced from 2009 to 2015, marked BMW's return to forced induction for its V8 flagship .

BMW employs a Condition Based Service (CBS) system that monitors driving habits, coolant temperatures, engine speeds, trip length, and number of vehicle starts to determine when maintenance is required . Rather than relying solely on fixed mileage intervals, the system adapts service timing to your actual driving profile. Service reminders appear in the instrument cluster and iDrive display when maintenance is due.

This guide presents the verified OEM maintenance schedule for the 2009 750Li alongside conservative owner-recommended intervals.

BMW Factory Maintenance Schedule

Verified Service Intervals

Based on available OEM documentation and manufacturer guidance, the following factory-recommended intervals apply to the 2009 BMW 750Li :

Condition Based Service (CBS) System

The 2009 750Li relies on the CBS system to track maintenance needs through vehicle sensors that monitor engine oil condition, brake pad wear, brake fluid age, spark plug service requirements, and vehicle inspection intervals . Service reminders appear in the instrument cluster and iDrive display when maintenance is due.

Engine Oil Change Guidance

Factory Requirements

The 2009 750Li uses BMW's Condition Based Service system to determine oil change timing based on actual driving conditions .

BMW Technical Service Bulletin Confirmation: A BMW TSB confirms the correct engine oil refill capacity for the N63 engine in the 2009 750Li is 9.5 quarts (9.0 liters) of engine oil . This specification applies to all future engine oil maintenance services and repairs that require draining and refilling the engine oil. Note: This bulletin excludes the ActiveHybrid 750Li vehicles, which have a different hybrid engine oil pan design .

Oil Specifications

The N63 engine requires synthetic oil meeting BMW Longlife-01 (LL-01) specifications. Common viscosities include 0W-30, 5W-30, and 5W-40. Always confirm the correct specification in your owner's manual.

Conservative Owner Recommendations

The N63 turbocharged V8 operates at high temperatures, making oil quality and regular changes essential. Many independent specialists recommend more frequent changes than the CBS system may indicate:

• 5,000-7,500 miles for severe driving conditions or performance-oriented use
• Annual changes even when mileage is low
• Regular oil level monitoring between changes

Signs that your 750Li may need an oil change sooner than scheduled include illuminated check engine or oil warning light, engine knocking sounds, oil smell inside the vehicle, or excessive exhaust output.

Spark Plug Replacement

Factory Schedule

The 2009 BMW 750Li's spark plugs are officially scheduled for replacement at 60,000 miles and again at 120,000 miles . Since its introduction, BMW has recommended a 60,000-mile replacement interval for N55 and N63 engine spark plugs . The N63 engine requires eight spark plugs.

A bad spark plug will harm performance and fuel mileage, affect drivability and engine smoothness, and unburnt fuel in the exhaust will shorten the lifespan of oxygen sensors and catalytic converters .

Replacement Considerations

• Use BMW-approved spark plugs designed for the N63 engine (F01/F02 750Li, 2009-2015)
• Replacement should be performed by a qualified technician with proper tools

General Tune-Up Guidance

Some general sources suggest replacing spark plugs approximately every 30,000 miles as a rule of thumb, but for the 2009 750Li, following BMW's 60,000-mile interval is the factory-recommended approach .

Signs you may need a tune-up include stalling or shaky idling when stopped, diminished fuel economy, engine knocking, or an illuminated check engine light .

Transmission Service Guidance

Factory Schedule

The 2009 BMW 750Li has a documented transmission fluid replacement interval of 100,000 miles .

Fluid Recommendations

BMW recommends exchanging transmission fluid at certain intervals with BMW-approved transmission fluid . Automatic transmission fluid is a specialized oil optimized for the specific requirements of each transmission, assisting in the lubrication and operation of brake bands, torque converter, and valves .

Conservative Owner Recommendations

Some technicians recommend having the transmission fluid checked and replaced between 30,000 and 60,000 miles, though this timeline can vary depending on vehicle usage and manufacturer recommendations . For a 2009 model now well past the factory 100,000-mile interval, transmission service should be considered proactively.

Transmission Warning Signs

Be alert for these symptoms indicating potential transmission issues:

• Shifting delays
• Grinding or jumping during acceleration
• Shakiness or vibration
• Whistling noises
• Burning smell from under the hood
• Decreased fuel economy

Brake Service Recommendations

Brake Fluid Replacement

Brake fluid should be replaced based on condition and time. BMW's general guidance for this era suggests brake fluid may be changed at the 30,000-mile mark, then every 60,000 miles thereafter . Checking brake fluid level should be done regularly; if the fluid is dark in color or it has been more than two years since it was changed, replacement should be considered.

Brake fluid absorbs moisture out of the air, and water vapor can quickly rust brake lines . Use BMW-approved brake fluid designed for the 2009 750Li .

Brake Inspection

BMW recommends that front and rear brakes be inspected as part of regular service intervals. Brake pads and rotors are wear items that should be checked regularly.

Signs of Brake Problems

Watch for these symptoms indicating brake service may be needed :

• Unusual noises when braking
• Vibrating pedal or steering wheel
• Burning smell from the tires
• Dashboard brake warning light
• A feeling that something is not right

Oxygen Sensor Replacement

The factory schedule specifies oxygen sensor replacement at:

• 120,000 miles
• 150,000 miles

Replacing oxygen sensors at these intervals helps maintain fuel efficiency and emissions performance. Unburnt fuel from worn spark plugs can shorten oxygen sensor lifespan .

Additional Service Considerations

Fuel Filter

Fuel filter replacement is generally recommended approximately every 20,000 to 40,000 miles as part of routine maintenance .

Engine Air Filter

The engine air filter should be replaced as part of regular scheduled maintenance to ensure proper engine breathing and fuel efficiency.

Wheel Alignment

Wheel alignment should be checked regularly, particularly after driving over potholes or rough roads. Symptoms of alignment issues include vehicle pulling to one side, uneven tire wear, or steering wheel off-center while driving straight.

Battery

Batteries generally need to be replaced every three to five years. Short trips and extreme temperatures can shorten battery life.

Fuel System Cleaning

Fuel system cleaning can remove varnish, dirt, and carbon deposits that have built up inside fuel injectors, throttle body, and throttle plate, improving fuel system performance .

Summary: Factory vs. Conservative Maintenance

Frequently Asked Questions

How often should I change the oil in my 2009 BMW 750Li?

The vehicle uses BMW's Condition Based Service system to determine oil change timing based on actual driving conditions. A BMW Technical Service Bulletin confirms the N63 engine oil capacity as 9.0 liters (9.5 quarts) . Many owners and specialists recommend 5,000-7,500 miles for added engine protection. Note that this capacity may differ for ActiveHybrid 750Li models.

When do spark plugs need to be replaced?

BMW's factory maintenance schedule specifies spark plug replacement at 60,000 miles and again at 120,000 miles . Some general sources suggest replacement approximately every 30,000 miles for optimal performance, but BMW's 60,000-mile interval is the factory-recommended approach for the N63 engine.

Does the 2009 BMW 750Li require transmission fluid changes?

Yes, the 2009 model has a documented transmission fluid replacement interval of 100,000 miles . BMW recommends exchanging transmission fluid with BMW-approved fluid at certain intervals.

When should brake fluid be changed?

BMW's general guidance for this era suggests brake fluid may be changed at the 30,000-mile mark, then every 60,000 miles thereafter . Brake fluid absorbs moisture and can cause corrosion in brake lines. If fluid is dark or it has been more than two years since it was changed, replacement should be considered.

When do oxygen sensors need replacement?

The factory schedule calls for oxygen sensor replacement at 120,000 miles and again at 150,000 miles . Unburnt fuel from worn spark plugs can shorten their lifespan.

How often should brake components be inspected?

BMW recommends that brakes be inspected as part of regular service intervals. Signs of brake problems include unusual noises, vibrating pedal, or dashboard warning lights.

What type of oil does the 2009 750Li use?

The N63 engine requires synthetic oil meeting BMW Longlife-01 specifications. BMW service documentation confirms the refill capacity is 9.0 liters (9.5 quarts) . Common viscosities include 0W-30, 5W-30, and 5W-40. The ActiveHybrid 750Li model has a different capacity due to its hybrid oil pan.

How often should the fuel filter be replaced?

Fuel filter replacement is generally recommended approximately every 20,000 to 40,000 miles as part of routine maintenance .

When should I consider a tune-up for my 2009 750Li?

Signs you may need a tune-up include stalling or shaky idling when stopped, diminished fuel economy, engine knocking, or an illuminated check engine light . Periodic tune-ups can improve engine performance, fuel economy, and emissions.

Should I follow BMW's CBS system or fixed intervals?

BMW's Condition Based Service system provides personalized maintenance timing based on actual driving conditions. Many owners choose to supplement CBS with conservative fixed intervals for critical services like oil changes. Using both approaches provides the best protection for your 750Li.