2015 BMW 750Li xDrive Maintenance Schedule & Service Intervals

Key Takeaways

• The 2015 BMW 750Li xDrive is powered by the N63TU 4.4-liter twin-turbocharged V8 engine, featuring a total oil capacity of approximately 9.5 liters .
• Spark plug replacement is officially scheduled at 60,000 miles, according to the OEM schedule .
• Oxygen sensors require replacement at 120,000 miles and again at 150,000 miles .
• Brake inspections are recommended at least every 12,000 miles or 12 months, with BMW advising front and rear brakes be disassembled and serviced at this interval .
• Wheel alignment checks are recommended approximately every 6,000 miles to prevent uneven tire wear and maintain handling .
• Transmission service is not on a fixed schedule; BMW recommends regular inspections, while the general guidance for fluid checks and changes typically falls between 30,000 and 60,000 miles depending on usage .

Introduction: Understanding Your 2015 750Li xDrive

The 2015 BMW 750Li xDrive is a flagship luxury sedan from the F02-generation, powered by the N63TU (N63B44) 4.4-liter twin-turbocharged V8 engine. This engine, producing 445 horsepower, is paired with BMW's xDrive all-wheel-drive system.

BMW utilizes a Condition Based Service (CBS) system that monitors driving habits and conditions to determine when maintenance is required. This system evaluates oil condition, brake pad wear, and other factors to provide personalized service reminders through the vehicle's iDrive and instrument cluster .

This guide presents the verified OEM maintenance schedule for the 2015 750Li xDrive 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 2015 BMW 750Li xDrive:

Condition Based Service (CBS) System

The 2015 750Li xDrive relies on the CBS system to track maintenance needs through vehicle sensors that monitor:

• Engine oil condition based on driving style and distance
• Brake pad wear through electronic sensors
• Brake fluid age
• Spark plug service requirements
• Vehicle inspection intervals

Service reminders appear in the instrument cluster and iDrive display when maintenance is due .

Engine Oil Change Guidance

Factory Approach

The 2015 750Li xDrive uses BMW's Condition Based Service system to determine oil change timing based on actual driving conditions rather than a fixed mileage interval.

Oil Specifications and Capacity

The N63TU engine requires synthetic oil meeting BMW Longlife-01 (LL-01) specifications. Recommended viscosities include:

• 0W-30 – Genuine BMW factory oil
• 5W-30 – Popular alternative
• 0W-40 – Suitable for varied climates

The N63TU engine has a total capacity of approximately 9.5 liters . When performing an oil change, actual drain volume is usually somewhat less; specialists recommend filling with approximately 8.5 quarts, test driving, checking the level through the iDrive system, and adding more if needed .

The oil filter kit includes the filter, cap o-rings, and a drain plug crush seal. Mahle is an OE supplier to BMW for these components .

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 xDrive 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 2015 BMW 750Li xDrive's spark plugs are officially scheduled for replacement at 60,000 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 worn 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
• BMW part number 12-12-0-037-580 is one option for this engine
• Replacement should be performed by a qualified technician with proper tools

Conservative Owner Recommendations

Some owners choose earlier replacement to maintain optimal performance:

• 30,000-40,000 miles for performance preservation
• Replacement recommended when experiencing rough idle, misfires, or reduced fuel economy

Brake Service Recommendations

Brake Inspection Interval

BMW recommends that front and rear brakes be disassembled and serviced at least once every 12 months or 12,000 miles . This inspection includes:

• Brake pad wear assessment
• Brake rotor condition
• Parking brake inspection
• Brake fluid level and condition

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

Brake Fluid Replacement

Brake fluid should be replaced according to BMW's standard time-based interval. This is critical for safety, as brake fluid absorbs moisture over time, which can reduce braking performance and cause corrosion in the brake system.

Wheel Alignment

BMW recommends wheel alignment checks approximately every 6,000 miles or 6 months . Symptoms indicating alignment issues include:

• Vehicle pulling to one side
• Uneven or rapid tire wear on only one tire
• Steering wheel off-center while driving straight
• Squealing tires

Unlike with other potential issues, you won't see any dashboard warning lights if your wheel alignment needs attention .

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.

Transmission Service Guidance

BMW's Recommendations

BMW recommends that the transmission be inspected routinely . Transmission and differential fluids should be exchanged at regular intervals with BMW-approved products .

Service Interval Considerations

Some technicians recommend having transmission fluid checked and replaced between 30,000 and 60,000 miles, though this timeline can vary depending on vehicle usage and manufacturer recommendations .

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

Common Causes of Transmission Issues

Transmission fluid can leak over time due to :

• Worn or damaged seals
• Loose or damaged transmission pan
• Cracked transmission housing
• Faulty transmission cooler lines
• Overfilled transmission

Summary: Factory vs. Conservative Maintenance

Frequently Asked Questions

How often should I change the oil in my 2015 BMW 750Li xDrive?

The vehicle uses BMW's Condition Based Service system to determine oil change timing based on actual driving conditions. The N63TU engine has a total capacity of approximately 9.5 liters . Many owners and specialists recommend 5,000-7,500 miles for added engine protection.

When do spark plugs need to be replaced?

BMW's factory maintenance schedule specifies spark plug replacement at 60,000 miles . The engine requires eight spark plugs. Some owners choose to replace them at 30,000-40,000 miles to maintain optimal performance.

How often should brake components be inspected?

BMW recommends that brakes be disassembled and serviced at least once every 12 months or 12,000 miles . This includes inspection of pads, rotors, and parking brake components.

When should I get a wheel alignment?

BMW recommends wheel alignment checks approximately every 6,000 miles or 6 months . Alignment issues can cause uneven tire wear and reduced fuel efficiency.

When do oxygen sensors need replacement?

The factory schedule calls for oxygen sensor replacement at 120,000 miles and again at 150,000 miles .

What type of oil does the 2015 750Li xDrive use?

The N63TU engine requires synthetic oil meeting BMW Longlife-01 (LL-01) specifications. Common viscosities include 0W-30 , 5W-30, and 0W-40 . The engine has a total capacity of approximately 9.5 liters .

Does the 2015 BMW 750Li xDrive require transmission fluid changes?

BMW recommends routine transmission inspection . Some technicians recommend checking and replacing transmission fluid between 30,000 and 60,000 miles, depending on usage and manufacturer recommendations .

What engine is in the 2015 BMW 750Li xDrive?

The 2015 BMW 750Li xDrive is powered by the N63TU (N63B44) 4.4-liter twin-turbocharged V8 engine, producing 445 horsepower . This engine has a compression ratio of 10:1 and features TwinPower Turbo technology .

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 xDrive.