BMW M440i G22/G23/G26 Maintenance Guide
BMW M440i G22/G23/G26 Maintenance Guide
The BMW M440i G22/G23/G26, equipped with the renowned B58 engine, offers an exceptional blend of performance and reliability. While this model is still relatively new, regular maintenance is crucial to ensure it continues to perform at its best over time. The B58 engine is known for its durability and robust performance, but like any high-performance engine, it requires proper care to avoid issues down the line. This maintenance guide outlines key areas to focus on to keep your M440i running smoothly for years to come.
Engine Oil and Oil Filter
The B58 engine is a sophisticated unit, and regular oil changes are vital to maintain its longevity and performance. BMW recommends changing the engine oil every 10,000 miles (16,000 km) or once a year, whichever comes first. However, if you tend to drive more aggressively or cover a lot of short journeys, you might need to change the oil more frequently. Always ensure you use the correct grade of oil as specified in the owner’s manual, as using the wrong type could affect engine performance and longevity.
In addition to oil changes, the oil filter should be replaced every time the oil is changed. A clogged or damaged filter can reduce oil flow and lead to engine wear, so this is an important task to complete at regular intervals.
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Cooling System
The B58 engine is a high-performance unit that generates considerable heat. As such, it’s essential to maintain the cooling system to avoid overheating and potential engine damage. Regularly check the coolant levels and inspect the radiator for any signs of leaks or damage. BMW recommends checking the coolant every 12,000 miles (19,000 km) or once a year.
If you notice any signs of the engine running hotter than usual or if the temperature gauge shows unusual readings, it’s important to address the issue immediately to prevent further damage. Coolant replacement intervals typically fall around every 60,000 miles (96,000 km), but always refer to your owner’s manual for the manufacturer’s recommendation.
It is relatively common for B58 motors to bleed a little bit of coolant through the coolant caps, a common replcement. Take off the coolant resovoir caps and inspect the seal, if you see a white crusty material, this is likely dried coolant.
Air Filters
Clean air filters are essential for maintaining engine efficiency and performance. BMW recommends replacing the air filter every 30,000 miles (48,000 km), although this may vary depending on driving conditions. If you frequently drive in dusty or polluted areas, it may be necessary to change the air filter sooner. Clogged air filters can reduce engine performance and fuel efficiency, so this is a relatively simple maintenance task that should not be overlooked.
Many owners do opt for an aftermarket filter and/or induction kit for extra noise and performance. Air Filter maintenance changes slightly due to different configurations however a good rule of thumb is to check your filter every 12 months.
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Spark Plugs
Spark plugs play a critical role in engine performance by ensuring proper combustion. BMW recommends replacing the spark plugs in the B58 engine at intervals of around 60,000 miles (96,000 km). Worn or fouled spark plugs can cause misfires, poor fuel economy, and rough idling. Regularly inspecting and replacing the spark plugs at the recommended intervals will help keep your M440i running smoothly.
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Transmission Fluid and Gearbox
While the B58 engine is known for its reliability, it is important to look after the transmission as well. For the M440i's 8-speed automatic transmission, fluid changes are typically not required at short intervals, but BMW recommends checking the fluid level every 30,000 miles (48,000 km) or so, particularly if you notice any transmission slippage, rough shifting, or unusual noises.
In some cases, the transmission fluid may need to be changed around the 60,000-mile (96,000 km) mark, depending on driving conditions. If you notice any issues with the gearbox, it is crucial to have it checked immediately to prevent further complications.
Brake Pads and Discs
As a performance-oriented vehicle, the BMW M440i places additional stress on its braking system. Brake pads should be inspected regularly, and they typically need replacing every 30,000 to 40,000 miles (48,000 to 64,000 km) depending on driving habits. Performance driving, heavy braking, or driving in mountainous areas can accelerate brake wear.
Brake discs should also be checked for wear and tear, as warped or damaged discs can affect braking performance and safety. If you notice any unusual vibrations or sounds when braking, it’s essential to have the braking system checked by a qualified technician.
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Tyres
Tyres are one of the most critical components when it comes to safety and performance. Regularly inspect the tread depth, especially if you’re driving a performance vehicle like the M440i, which places greater demands on the tyres. The legal minimum tread depth in the UK is 1.6mm, but for optimal performance, it’s recommended to replace tyres when they reach around 3mm.
Check for any signs of uneven wear, as this can indicate issues with alignment or suspension. Proper tyre inflation is also important for handling and fuel efficiency, so make sure your tyres are inflated to the recommended levels.
Suspension and Steering
The M440i is equipped with a performance-oriented suspension system, which is critical for its handling and driving dynamics. While the car is still relatively new, it’s important to monitor for any unusual noises or handling issues, as this could indicate wear in the suspension components. The adaptive M suspension should be checked regularly for any leaks or damage to the dampers.
In addition, ensure that the steering system is functioning smoothly, with no play or strange noises during turns. If you notice any issues, have the steering and suspension systems inspected to prevent further damage.
Conclusion
The BMW M440i G22/G23/G26, with its B58 engine, is a well-engineered performance vehicle that offers a rewarding driving experience. While the car is relatively new and the engine is known for its reliability, regular maintenance is essential to ensure it remains in peak condition. From oil changes and air filter replacements to checking the brakes and tyres, staying on top of routine maintenance will help prolong the life of your M440i and ensure it continues to perform at its best. By following the recommended service intervals and addressing issues promptly, you can enjoy many years of driving pleasure with your M440i.