BMW M5 F90 Service Checklist: Maintenance Items, Intervals, and Common Pitfalls

The BMW M5 F90 is a high-performance sedan with the S63 twin-turbo V8, all-wheel drive, and complex cooling and electronics systems.

This BMW M5 F90 service checklist explains the maintenance items that matter most, when to inspect them, and what owners often overlook.

Why the BMW M5 F90 Needs a Structured Service Checklist

The F90-generation M5 combines track-capable performance with everyday usability, but that balance depends on disciplined maintenance.

Compared with a standard 5 Series, the M5 uses more heat, more load, and more specialized components, which means small service delays can become expensive repairs.

A good maintenance plan helps preserve engine health, transmission performance, braking consistency, and the long-term value of the car.

It also reduces the risk of issues tied to heat cycling, fluid degradation, turbocharger stress, and tire wear from the car’s power delivery and xDrive system.

BMW M5 F90 Service Checklist at a Glance

• Engine oil and filter: Check regularly; change based on use and interval.
• Coolant system: Inspect hoses, reservoir, water pump, and thermostat.
• Brakes: Measure pad thickness, rotor condition, and brake fluid age.
• Transmission and differential fluids: Service at appropriate intervals for performance driving.
• Air filters and cabin filters: Replace to maintain airflow and climate control.
• Spark plugs and ignition components: Replace on schedule to prevent misfires.
• Tires and alignment: Check wear, pressure, and rotation strategy.
• Battery and charging system: Test health, especially on cars with short-trip use.
• Software and diagnostics: Scan for fault codes and apply updates when needed.

Engine Oil and Filter Service

The S63 engine relies on clean, high-quality oil to protect turbos, bearings, and valvetrain components under high temperatures.

Many owners follow the factory service indicator, but more frequent oil changes are often wise if the car is driven hard, sees track use, or spends time in hot climates.

Use the correct BMW-approved oil specification and replace the filter at each service.

Check for leaks around the valve covers, oil filter housing, and drain plug area, and inspect oil level carefully after spirited driving.

What to look for during an oil service

• Oil condition, color, and smell
• Metal debris in drained oil or filter media
• Seepage from the oil pan or housing seals
• Signs of elevated consumption between services

Cooling System Inspection

Heat management is critical on the BMW M5 F90 because the engine, turbochargers, and transmission all generate substantial thermal load.

The cooling system should be checked for leaks, brittle hoses, low coolant level, and proper fan operation.

Inspect the expansion tank, radiator, coolant lines, intercooler-related plumbing, and underbody for dried residue or staining.

If you notice temperature fluctuations, coolant loss, or warning messages, the car should be diagnosed immediately.

Cooling system checklist items

• Coolant level and condition
• Water pump function
• Thermostat operation
• Radiator and charge-cooling seals
• Hose condition and clamp integrity
• Electric fan activation and responsiveness

Brake System Service

The M5’s performance capability depends heavily on its braking system, especially if the car is driven aggressively or in urban stop-and-go traffic.

Brake pad thickness, rotor condition, and brake fluid age should all be checked regularly.

BMW brake fluid absorbs moisture over time, which can reduce pedal feel and boil resistance.

Even if the pads still have life left, aged fluid can compromise consistency during hard use.

Brake service priorities

• Measure front and rear pad wear
• Inspect rotors for cracks, grooves, and lip formation
• Check calipers for uneven pad wear or seepage
• Replace brake fluid on schedule
• Listen for squeal, vibration, or pedal pulsation

Transmission and xDrive Drivetrain Maintenance

The F90 M5’s automatic transmission and xDrive system work together to deliver traction and rapid shifts, but both benefit from fluid service.

Although some components are marketed as long-life, enthusiasts and technicians often recommend more proactive fluid changes for vehicles driven hard.

During service, inspect the transmission pan area, transfer case, and differential housings for leaks.

Any delayed engagement, rough shifting, or driveline vibration should be evaluated promptly.

Key drivetrain checks

• Transmission fluid condition and service interval
• Transfer case fluid condition
• Front and rear differential fluid condition
• Driveshaft and CV joint wear
• Mounts and bushings for cracking or excess movement

Spark Plugs and Ignition Components

The S63 engine runs under high cylinder pressure, so healthy ignition components are essential.

Worn spark plugs can lead to misfires, reduced efficiency, harder cold starts, and uneven power delivery.

Coils should also be inspected if the car shows hesitation, a check engine light, or rough idle.

If the car has been tuned or driven aggressively, ignition wear can occur sooner than expected.

Signs ignition service may be due

• Rough idle or hesitation under load
• Misfire codes
• Reduced throttle response
• Poor fuel economy compared with normal patterns

Air Filtration and Cabin Comfort Systems

Clean air filters help the engine breathe efficiently and protect intake components from dirt.

Cabin filters are equally important for climate control performance, air quality, and HVAC system efficiency.

On the M5, maintaining clean airflow supports consistent performance and keeps the interior environment comfortable.

If the car is driven in dusty environments or polluted cities, filter replacement may be needed sooner than the standard interval.

• Engine air filters: Inspect for clogging, contamination, and torn elements.
• Cabin filters: Replace if airflow drops or odors persist.
• Intake paths: Check for loose clamps or debris ingress.

Tire Wear, Alignment, and Suspension Checks

High torque and xDrive traction can accelerate tire wear, especially on the rear axle and inner shoulders if alignment is out of specification.

Tire pressure should be checked regularly, and tread depth should be measured across the full width of each tire.

Suspension inspection should include bushings, control arms, shocks, and linkages.

The M5’s weight and performance tuning make it sensitive to worn components, which can affect steering precision and braking stability.

Suspension and tire service checklist

• Check inner and outer tire shoulder wear
• Rotate tires if appropriate for the setup
• Verify alignment after impact or uneven wear
• Inspect for wheel damage or curb rash
• Look for play in suspension joints and bushings

Battery, Charging, and Electrical Diagnostics

Modern BMWs use sophisticated electrical systems, and the M5 F90 is no exception.

Short trips, long storage periods, and heavy accessory use can weaken the battery and trigger warning messages or driveability issues.

Battery health testing is more useful than simple visual inspection.

A weak battery can cause low-voltage faults, start-stop issues, comfort feature malfunctions, and unnecessary diagnostic confusion.

• Test battery state of health and state of charge
• Check charging system performance
• Inspect terminals and grounds for corrosion
• Confirm there are no parasitic drain concerns

Software Updates and Fault-Code Scanning

Because the BMW M5 F90 uses many control modules, diagnostics should be part of routine maintenance.

Fault-code scanning can reveal developing issues before they become obvious, including sensor faults, cooling warnings, misfire counters, and drivetrain alerts.

Software updates from BMW or a knowledgeable specialist can improve system behavior, fix known bugs, and address compatibility issues after repairs.

It is especially important to scan the car before buying a used M5 or after any major repair.

Recommended Service Frequency for Daily Driven and Hard Driven Cars

Service intervals should reflect how the car is used, not just what the dashboard suggests.

A daily driven M5 that mostly cruises will generally have different needs from one that sees repeated launches, spirited mountain driving, or track days.

• Daily driven street use: Follow regular oil, brake, and filter inspections closely.
• Performance street use: Shorten fluid intervals and inspect brakes and tires more often.
• Track or spirited use: Prioritize oil, brake fluid, cooling, and tire checks after each event.

Common BMW M5 F90 Service Mistakes to Avoid

One common mistake is assuming the factory interval is always enough for an enthusiast-owned car.

Another is ignoring small warning signs, such as slight coolant loss, uneven brake wear, or a subtle misfire, until the problem becomes more serious.

Owners also sometimes focus on engine oil while neglecting transmission fluid, brake fluid, and drivetrain service.

For a car with this level of performance, the entire system needs attention, not just the engine.

• Skipping fluid checks between scheduled services
• Using non-approved fluids or cheap filters
• Ignoring alignment after tire replacement or impacts
• Delaying diagnosis of warning lights
• Overlooking battery health in low-mileage cars

What to Record After Each Service?

Keeping a simple maintenance log makes ownership easier and helps with resale value.

Record the date, mileage, parts used, fluid specifications, and any issues found during inspection.

For a BMW M5 F90, a detailed log can also help diagnose patterns such as repeated coolant loss, accelerated brake wear, or a battery that weakens after storage.

That history is especially valuable if the car is modified or used in demanding conditions.

• Service date and mileage
• Oil brand and specification
• Brake pad and rotor measurements
• Tire brand, size, and tread depth
• Any fault codes or repairs performed