2013 Bmw 750Li Xdrive Sedan – The Ultimate Owner’S Maintenance
The 2013 BMW 750Li xDrive Sedan represents a peak in German executive luxury, combining the stretched wheelbase of the “Li” designation with the security of all-wheel drive. This guide provides owners and DIY mechanics with the technical insights needed to maintain the N63Tu engine, manage the sophisticated xDrive system, and ensure long-term reliability. By following these professional maintenance protocols, you can enjoy the immense power and comfort of this flagship vehicle without the typical “out-of-warranty” headaches.
Owning a flagship luxury car is a dream for many enthusiasts who crave power and prestige. You likely appreciate the 445-horsepower twin-turbo V8 and the whisper-quiet cabin that defines this executive cruiser. However, keeping a high-performance machine like the 2013 bmw 750li xdrive sedan in top shape requires more than just basic car washes and occasional oil changes.
In this guide, we will break down the complexities of the F02 chassis and its updated powertrain. We will cover the specific mechanical vulnerabilities you need to watch for and the preventative steps that save you thousands in repair bills. From engine bay heat management to suspension calibration, you will learn how to handle this car like a seasoned BMW technician.
Whether you are a weekend DIYer or a dedicated owner who wants to speak the same language as your mechanic, this information is vital. Let’s dive into the technical details of the 2013 bmw 750li xdrive sedan and explore what it takes to keep this Bavarian masterpiece on the road for years to come.
Understanding the Heart: The N63Tu V8 Engine
The 2013 model year is significant because it introduced the “Technical Update” or N63Tu engine. This version addressed several reliability concerns found in earlier 7 Series models. It features Valvetronic technology and improved turbocharger cooling, making it a much more robust unit than its predecessor.
Even with these improvements, the “Hot V” configuration remains a unique challenge for heat management. In this design, the turbochargers sit inside the “V” of the engine block rather than on the outside. This creates extreme temperatures under the hood that can degrade plastic and rubber components over time.
Check your vacuum lines and plastic coolant T-fittings every 10,000 miles. These parts often become brittle due to the intense heat soak after you turn off the engine. Replacing these proactively prevents vacuum leaks that cause “Drivetrain Malfunction” warnings on your dashboard.
Managing Oil Consumption
While the N63Tu is better than the original N63, it may still consume a small amount of oil between service intervals. BMW considers some oil consumption normal, but you should monitor the levels closely via the iDrive system. Always keep a liter of 5W-30 or 0W-30 synthetic oil in the trunk for top-offs.
If you notice blue smoke from the exhaust after idling, your valve stem seals might be wearing out. This is a labor-intensive repair, so catching it early through consistent oil analysis is a smart move. Change your oil every 5,000 miles rather than the 10,000-mile interval suggested by the car’s computer to keep the turbo oil lines clean.
Turbocharger Cooling and Care
The 2013 bmw 750li xdrive sedan utilizes an auxiliary electric water pump to cool the turbos after the engine is shut down. Listen for a faint humming sound from the engine bay after you park. If you don’t hear this pump running on a hot day, have it inspected immediately to prevent turbo bearing failure.
Avoid heavy acceleration until the engine oil reaches full operating temperature. Similarly, let the car idle for 60 seconds after a long highway run before turning it off. These simple habits extend the life of the twin scroll turbochargers significantly.
Essential Maintenance for the 2013 bmw 750li xdrive sedan
To keep your 2013 bmw 750li xdrive sedan performing like new, you must adhere to a strict maintenance schedule. This car is a complex ecosystem of sensors, actuators, and mechanical parts that require high-quality fluids and components. Never cut corners with “universal” parts; always stick to OEM (Original Equipment Manufacturer) or high-quality equivalents like Bosch or Lemförder.
Start by investing in a dedicated BMW diagnostic scanner, such as a Foxwell NT510 or an OBDII adapter with the BimmerLink app. These tools allow you to read manufacturer-specific codes that generic scanners at auto parts stores will miss. Knowing exactly what a sensor is reporting can save you hours of guesswork in the garage.
Regularly inspect the engine air filters, as there are two of them tucked near the front fenders. A clogged filter starves the turbos of air, reducing fuel economy and power. Replace these every 20,000 miles, or more often if you live in a dusty environment.
Spark Plugs and Ignition Coils
The high-compression, turbocharged nature of the N63Tu engine is hard on ignition components. You should replace your spark plugs every 30,000 to 40,000 miles to maintain smooth idling and prevent misfires. Use NGK Laser Iridium plugs for the best results and ensure they are gapped correctly to 0.028 inches.
If you experience a stutter under heavy acceleration, an ignition coil is likely failing. It is often best to replace all eight coils at once if the car has over 70,000 miles. This ensures consistent spark across all cylinders and prevents the “cascading failure” effect where coils die one by one.
Battery Health and Registration
The 7 Series is notorious for its heavy electrical load. Between the soft-close doors, heated/ventilated seats, and dozens of control modules, the battery works overtime. If your battery is more than four years old, expect to see “Increased Battery Discharge” messages.
When you replace the battery in a 2013 bmw 750li xdrive sedan, you must register the new battery using a scan tool. The car’s alternator changes its charging profile as a battery ages. If you don’t register the new one, the alternator will overcharge it, significantly shortening its lifespan.
Managing the xDrive All-Wheel Drive System
The xDrive system provides incredible grip in rain and snow, but it adds another layer of maintenance. The system uses a transfer case with a multi-plate clutch to distribute torque between the front and rear axles. This mechanical process generates heat and wear over time.
Many dealerships claim the transfer case fluid is “lifetime,” but experienced technicians disagree. Change the transfer case fluid every 50,000 miles to prevent the “shudder” that occurs during low-speed turns. Use only the BMW DTF-1 fluid to ensure the clutches engage smoothly.
If you feel a vibration or jerking during acceleration, check the fluid first before assuming the transfer case is broken. A simple fluid change and a “calibration” via a scan tool can often fix minor drivability issues. This is a relatively easy DIY task if you have a fluid transfer pump and jack stands.
The Importance of Tire Uniformity
The xDrive system is extremely sensitive to differences in tire diameter. If one tire is significantly more worn than the others, it can trick the system into thinking a wheel is slipping. This causes constant, unnecessary engagement of the transfer case clutches, leading to premature wear.
Always replace tires in sets of four on the 2013 bmw 750li xdrive sedan. If you must replace just two, ensure the brand, model, and tread depth are nearly identical to the remaining pair. BMW recommends that the tread depth difference between tires be no more than 2mm.
Check your tire pressures weekly. Low pressure in one tire changes its rolling circumference, which stresses the xDrive system. Stick to the pressures listed on the driver’s side door jamb for the best balance of handling and drivetrain longevity.
Suspension and Braking: Maintaining the Ride Quality
The “Li” in 750Li stands for Lang-Information, or long wheelbase, which provides that signature magic-carpet ride. Most of these models come equipped with rear air suspension (Electronic Damping Control). While comfortable, air bellows are wear items that eventually leak.
If you find your car “squatting” in the rear after being parked overnight, you have a leak in the air bags. Do not ignore this, as the air compressor will run constantly to compensate, eventually burning itself out. Replacing the air bags is a straightforward job for a DIYer with basic hand tools.
Front control arm bushings are another common wear point. Because the 750Li is a heavy car, the rubber bushings take a beating during braking and cornering. If you feel a “clunk” over bumps or a shimmy in the steering wheel at highway speeds, inspect the thrust arm bushings for cracks or fluid leaks.
Brake System Maintenance
Stopping a 4,600-pound sedan requires massive braking force. The 750Li uses large rotors and multi-piston calipers that generate significant dust. When it’s time for a brake job, choose high-quality ceramic pads if you want to keep your wheels clean, or stick with OEM semi-metallic pads for maximum “bite.”
Flush your brake fluid every two years regardless of mileage. Brake fluid is hygroscopic, meaning it absorbs moisture from the air. Over time, this moisture can corrode the expensive ABS/DSC pump and lower the boiling point of the fluid, leading to a spongy pedal during spirited driving.
When replacing rear pads, remember that the 2013 model has an electronic parking brake. You will need a scan tool to retract the parking brake actuators into “service mode” before you can compress the caliper pistons. Forcing them back manually will break the expensive internal motor.
DIY Troubleshooting and Common Faults
Living with a 2013 bmw 750li xdrive sedan means being prepared for the occasional warning light. Many of these issues are common across the F01/F02 platform and have well-documented solutions. Knowing the symptoms can help you decide if a repair is a DIY project or a job for a pro.
- Drivetrain Malfunction: This is a generic warning that can mean anything from a loose gas cap to a failing turbo. Always pull the codes first.
- Coolant Loss: Check the “turbo coolant lines” on top of the engine. The rubber sections often fail. Replace them with updated braided stainless steel lines.
- Soft-Close Door Failure: If a door won’t pull itself shut, the actuator motor inside the door panel has likely failed. This is a common but tedious DIY fix.
- iDrive Blackout: If your screen goes dark or reboots, check the battery voltage first. Low voltage causes the infotainment system to crash.
If you encounter a “Limp Mode” situation where the car loses significant power, pull over safely and restart the engine. Sometimes a sensor glitch can be cleared with a power cycle. However, if the warning persists, do not continue driving, as you risk damaging the catalytic converters or the engine itself.
Frequently Asked Questions About the 2013 bmw 750li xdrive sedan
Is the 2013 750Li reliable compared to the 2012 model?
Yes, the 2013 model is generally considered more reliable because it features the N63Tu engine. This update fixed several major design flaws found in the 2009-2012 models, including better oiling and cooling systems. However, it still requires diligent maintenance to stay trouble-free.
What type of fuel should I use?
You must use 91 octane premium unleaded fuel at a minimum. Using lower octane fuel will cause the engine to pull timing to prevent knocking, which reduces power and fuel efficiency. Over time, poor fuel quality can lead to carbon buildup on the intake valves.
How often should I change the transmission fluid?
BMW claims the ZF 8-speed transmission has “lifetime” fluid. However, ZF (the manufacturer of the transmission) recommends changing the fluid and filter every 60,000 to 80,000 miles. This is critical for maintaining smooth shifts and preventing solenoid wear.
Can I use non-run-flat tires?
Yes, many owners switch to standard tires to improve ride quality and reduce road noise. However, remember that the 2013 bmw 750li xdrive sedan does not come with a spare tire. If you make the switch, carry a tire plug kit and a portable air compressor in the trunk.
Final Thoughts for the Savvy Owner
The 2013 bmw 750li xdrive sedan is a remarkable piece of engineering that offers a driving experience few other cars can match. By taking a proactive approach to maintenance—especially regarding heat management and fluid changes—you can mitigate the high costs often associated with luxury car ownership. Always listen to what the car is telling you; a small vibration or a faint smell of coolant is often the first sign of a repair that is much cheaper to fix today than tomorrow.
Remember that safety is paramount. If you are ever unsure about a DIY repair, especially one involving the braking system or high-pressure fuel lines, consult a certified BMW technician. With the right tools and a bit of patience, you can keep this executive sedan gliding down the highway for many years to come. Stay safe, keep your tools sharp, and enjoy the drive!
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