2020 Bmw M5 Competition – The Ultimate Guide To Maintenance
The 2020 BMW M5 Competition is a high-performance masterpiece that requires precise care to maintain its 617-horsepower output. This guide provides actionable maintenance schedules, troubleshooting for common S63 engine issues, and pro tips for keeping your super-sedan in peak condition.
Owning a 2020 bmw m5 competition means you are behind the wheel of one of the fastest production sedans ever built. You likely appreciate the surgical precision of its handling and the raw power of its twin-turbocharged V8 engine. However, maintaining such a complex machine requires more than just a standard oil change at the local dealership.
You may be concerned about the long-term reliability of the high-tech components or simply want to perform your own basic service to ensure it is done right. This article serves as your technical roadmap, covering everything from fluid choices to critical cooling system inspections. We will bridge the gap between “enthusiast owner” and “experienced technician” to keep your M5 running flawlessly.
Whether you are preparing for a track day or looking to preserve the resale value of your investment, these insights will help you succeed. We will dive deep into the mechanical heart of the car, identify potential weak points, and provide the exact steps needed for professional-grade upkeep. Let’s get under the hood and explore what makes this 2020 bmw m5 competition truly special.
Understanding the Heart of the S63B44T4 Engine
The engine inside your M5 is a 4.4-liter V8 featuring a “Hot V” configuration where the turbochargers sit inside the cylinder banks. This design reduces turbo lag and improves throttle response, but it creates immense heat under the hood. As a DIYer, you must prioritize heat management to protect plastic and rubber components from becoming brittle over time.
The S63B44T4 engine utilizes cross-bank exhaust manifolds to keep exhaust pulses even, ensuring the turbos spool up simultaneously. This complexity means that even a small vacuum leak or a failing sensor can lead to significant performance drops. Regularly scanning for hidden “shadow codes” using a dedicated BMW diagnostic tool is a crucial habit for any owner.
Pay close attention to the air intakes and the charge air coolers. Because these coolers are water-to-air, they rely on a secondary cooling circuit separate from the main engine radiator. If you notice a slight drop in power on hot days, it may indicate that your intercooler pump is struggling or the secondary coolant level is low.
Essential Maintenance for Your 2020 bmw m5 competition
To keep the 2020 bmw m5 competition performing at its peak, you cannot follow the standard “CBS” (Condition Based Service) intervals if you drive the car spiritedly. BMW often suggests long oil change intervals, but experienced mechanics recommend a more frequent approach. Changing your oil every 5,000 miles is the cheapest insurance policy against premature bearing wear.
Oil Service and Filter Selection
Always use a high-quality synthetic oil that meets the BMW LL-01 FE or LL-17 FE+ specifications. Many enthusiasts prefer 5W-30 or 0W-30 weights from brands like Liqui Moly or Pennzoil Euro for better shear stability. When replacing the oil filter, ensure you use an OEM Mahle or Mann filter to maintain proper oil flow and filtration efficiency.
Don’t forget to replace the crush washer on the drain plug every single time. The S63 engine holds approximately 10 liters of oil, so be prepared with a large enough catch pan. After the service, use the iDrive system to reset the service indicator and verify the oil level electronically, as there is no traditional dipstick.
Spark Plugs and Ignition Coils
High-boost engines like the one in the 2020 bmw m5 competition are very sensitive to spark plug gaps. It is recommended to replace your spark plugs every 20,000 to 30,000 miles, especially if you have installed a performance tune. Use NGK or genuine BMW High Power plugs and torque them to exactly 23Nm to avoid cracking the porcelain.
While you are in there, inspect the ignition coils for any signs of “arcing” or discoloration. If the car experiences a “Drivetrain Malfunction” warning under heavy acceleration, a failing coil pack is often the culprit. Replacing these is a straightforward DIY task that can save you hundreds in labor costs at the dealership.
Managing the “Hot V” Heat and Cooling System
Heat is the primary enemy of the 2020 bmw m5 competition engine bay. The turbochargers can reach temperatures exceeding 1,000 degrees Fahrenheit, radiating heat directly onto the surrounding components. This makes the cooling system the most critical area for preventative inspections and regular maintenance.
The Infamous Coolant Expansion Tank Issue
One of the most documented problems with this generation of M5 is the leaking coolant expansion tank. The plastic seam on the tank can fail, allowing coolant to weep out and drip directly onto the fuel injectors and wiring harness. This can cause catastrophic electrical damage if left unaddressed for too long.
Check your expansion tank every time you wash the car. Look for white, crusty residue around the seams or the blue cap. If you see any signs of leakage, replace the tank immediately with the updated part number. Some owners even install a “drip shield” as an extra layer of protection for the sensitive injectors below.
Secondary Cooling Circuit Maintenance
The M5 uses two separate cooling systems: one for the engine and one for the charge air coolers (intercoolers). Both systems have their own expansion tanks and electric water pumps. Ensure you use only BMW-approved HT-12 green coolant mixed 50/50 with distilled water to prevent internal corrosion.
Bleeding these systems is a specific process that requires a scan tool or a specific sequence of pedal presses to activate the electric pumps. Never open the caps while the engine is hot, as the systems are highly pressurized. A vacuum filling tool is highly recommended for DIYers to ensure no air pockets remain in the complex cooling lines.
Drivetrain and M xDrive Optimization
The 2020 model year features the brilliant M xDrive system, which allows you to switch between 4WD, 4WD Sport, and 2WD modes. This system uses a transfer case with an electronically controlled multi-plate clutch. While it is incredibly robust, the fluids inside are subjected to massive torque loads and require periodic replacement.
Transfer Case and Differential Service
The transfer case fluid should be changed every 40,000 to 50,000 miles to maintain smooth engagement. If you feel a “shudder” during low-speed tight turns, it is a sign the fluid has broken down. Use only the specific BMW DTF-1 fluid for the transfer case to ensure the clutches don’t slip prematurely.
The rear M-differential is also a high-stress component that requires specialized 75W-140 G3 fluid. Changing the differential fluid is a simple “drain and fill” procedure that most DIYers can handle with a floor jack and jack stands. Always loosen the fill plug first to ensure you can refill the unit before you drain the old fluid out.
ZF 8-Speed Transmission Care
The ZF 8HP76 transmission in the M5 is legendary for its speed and durability. ZF, the manufacturer, recommends fluid changes every 50,000 to 60,000 miles, despite BMW’s “lifetime fluid” claim. Replacing the pan (which contains the integrated filter) and the fluid will significantly extend the life of the transmission and maintain crisp shift quality.
Braking Performance and Suspension Care
Stopping a 4,300-pound car from triple-digit speeds generates an incredible amount of kinetic energy. Your 2020 bmw m5 competition likely has either the massive steel rotors or the optional Carbon Ceramic Brakes (CCB). Each requires a different maintenance mindset to ensure safety and performance.
- Steel Brakes: These are prone to “pad deposits” if the car is driven hard and then parked with hot brakes. Always perform a cool-down lap or drive slowly for a few miles before shutting down.
- Carbon Ceramics: While they last a long time, they are extremely expensive to replace. Inspect the rotors for “pitting” or weight loss, which is how CCB wear is measured rather than thickness.
- Brake Fluid: High-performance driving boils standard fluid. Switch to a high-temp fluid like Castrol SRF or Motul RBF600 and flush the system every 2 years.
The Competition model features a 7mm lower ride height and 10% stiffer springs than the standard M5. Inspect the adaptive damper bellows for tears and look for any signs of hydraulic fluid leaking down the strut body. If the car feels “bouncy” or makes a clunking sound over bumps, the ball joints or control arm bushings may need attention.
Common Pitfalls and Troubleshooting Strategies
Even a well-maintained 2020 bmw m5 competition can throw the occasional error code. The most common “limp mode” triggers are related to the fuel system or the air intake tract. If you experience a sudden loss of power, the first step is to check the low-pressure fuel pump and the high-pressure pumps on top of the engine.
Another common issue is the “chassis restricted” warning, which often points to a faulty ride-height sensor or a damaged wire in the wheel well. Because the M5 is so low, it is easy to snag a sensor wire on road debris. Always inspect the wiring harnesses whenever you have the wheels off for a tire rotation or brake check.
For those who live in colder climates, the battery in the M5 is a lightweight Lithium-Ion (LiFePO4) unit. These batteries are extremely expensive to replace (often over $1,500). If you store the car for more than a week, you must use a specialized lithium-compatible battery tender to prevent the voltage from dropping too low.
Frequently Asked Questions About the 2020 bmw m5 competition
What is the 0-60 mph time for the 2020 M5 Competition?
The 2020 M5 Competition is officially rated at 3.1 seconds for the 0-60 mph sprint. However, in real-world testing with launch control and ideal tire conditions, many owners have recorded times as low as 2.8 or 2.9 seconds. This makes it one of the quickest accelerating internal combustion cars on the market.
Can I use regular 87 or 89 octane fuel in an emergency?
You should strictly avoid low-octane fuel in the S63 engine. The high compression and turbo boost levels require at least 91 octane, though 93 octane is highly recommended for maximum performance. Using lower octane can cause engine knock, which the computer will attempt to compensate for by pulling timing, resulting in significantly reduced power.
Does the 2020 M5 Competition have a drift mode?
Yes, the M xDrive system features a “2WD” mode that sends 100% of the torque to the rear wheels. To activate this, you must turn Dynamic Stability Control (DSC) completely off. This mode is intended for track use only and allows for traditional rear-wheel-drive sliding and “drifting” capabilities.
How often should I replace the cabin and engine air filters?
For the engine air filters, inspect them every 10,000 miles and replace them at 20,000 miles. If you drive in dusty environments, you may need to do this sooner. The cabin microfilters should be replaced every 15,000 miles or once a year to ensure the HVAC system remains efficient and the air inside the cabin stays fresh.
Conclusion
The 2020 bmw m5 competition is a pinnacle of automotive engineering that offers a dual personality: a comfortable executive cruiser and a ferocious track weapon. By following a rigorous maintenance schedule, keeping a close eye on the cooling system, and using the right fluids, you can enjoy this machine for many years to come. Remember that preventative care is always cheaper than reactive repairs on a vehicle of this caliber.
Don’t be intimidated by the complexity of the M xDrive or the S63 engine. With the right tools, a dedicated diagnostic scanner, and a safety-first mindset, you can handle many of the essential tasks yourself. Stay proactive, listen to what your car is telling you, and never skip a cool-down period after a spirited drive. Stay safe and enjoy the incredible performance of your M5!
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