BMW 4 Series top fixes: how owners handle the common issues

The BMW 4 Series is a stylish and dynamic vehicle, but like any car, it can experience issues over time. Common problems reported by owners include electrical faults, suspension wear, and engine performance concerns. Fortunately, there are practical fixes for these issues that can help maintain the vehicle’s performance and reliability.

Electrical Issues

One of the most frequently reported problems with the BMW 4 Series is electrical faults. Owners often experience issues with the infotainment system, dashboard warning lights, and battery drainage. To address these issues, it is advisable to check the battery connections and ensure they are clean and secure.

If the infotainment system is unresponsive, performing a soft reset can often resolve the issue. This can be done by holding down the power button until the system restarts. For persistent warning lights, using an OBD-II scanner to read the fault codes can help identify the underlying problem, allowing for targeted repairs.

Suspension Problems

Suspension wear is another common complaint among BMW 4 Series owners, particularly those who drive on uneven roads. Symptoms may include a bumpy ride, knocking noises, or uneven tyre wear. Regularly inspecting the suspension components, such as shock absorbers and bushings, is crucial for early detection of wear.

If you notice any signs of wear, replacing worn components can significantly improve ride quality. Additionally, having a professional alignment check can help prevent uneven tyre wear and enhance handling. Keeping the suspension system well-maintained will ensure a smoother driving experience.

Engine Performance

Some BMW 4 Series owners report issues with engine performance, including rough idling, reduced power, and increased fuel consumption. These issues can often be traced back to problems with the fuel system or air intake. Regularly replacing the air filter and fuel filter can help maintain optimal engine performance.

If the engine is running rough, it may be beneficial to check the spark plugs and ignition coils. Replacing worn spark plugs can improve fuel efficiency and overall engine performance. Regular servicing, including oil changes and using high-quality fuel, can also help prevent performance-related issues.

Cooling System Failures

Cooling system failures can lead to overheating, which is a serious issue for any vehicle. Owners of the BMW 4 Series have reported problems with the water pump and thermostat. Regularly checking the coolant level and inspecting for leaks can help prevent overheating.

If you notice the temperature gauge rising, it is essential to stop the vehicle and allow it to cool down. Replacing a faulty water pump or thermostat can prevent further damage to the engine. Additionally, flushing the cooling system every few years can help maintain its efficiency and prevent blockages.

Brake System Concerns

Brake system issues are critical for safety and are commonly reported by BMW 4 Series owners. Symptoms may include squeaking noises, reduced braking performance, or a spongy brake pedal. Regularly inspecting brake pads and discs is essential for ensuring optimal braking performance.

If you notice any signs of wear, replacing the brake pads and discs promptly can prevent further damage and ensure safety. Additionally, bleeding the brake system to remove air can improve pedal feel and responsiveness. Keeping the brake fluid at the correct level is also crucial for maintaining brake performance.

Tyre Wear and Maintenance

Tyre wear is a common issue that can affect the handling and safety of the BMW 4 Series. Owners should regularly check tyre pressure and tread depth to ensure optimal performance. Under-inflated tyres can lead to uneven wear and reduced fuel efficiency.

Rotating the tyres every 5,000 to 7,500 miles can help promote even wear and extend their lifespan. Additionally, having the alignment checked can prevent premature tyre wear and improve handling. Keeping tyres properly maintained is essential for safety and performance on the road.

BMW 4 Series MOT record

From 96,245 recorded MOT tests, 15.0% failed.

MOT pass and failure rates by year of first registration
Registered	Tests	Failed	Median mileage
2021	408	9.8%	34,458 mi
2020	3,820	11.8%	38,032 mi
2019	10,075	13.5%	47,163 mi
2018	15,356	13.0%	55,686 mi
2017	16,972	13.5%	67,299 mi
2016	18,050	14.5%	77,676 mi
2015	17,821	17.1%	84,909 mi
2014	12,230	19.3%	89,477 mi

Most common reasons for failure

Tyre tread depth not in accordance with the requirements39.0%
A tyre seriously damaged23.9%
a brake lining or pad worn below 1.5mm14.5%
A tyre cords visible or damaged11.5%
Brake disc or drum excessively weakened, insecure or fractured11.1%

Figures cover every BMW 4 Series tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Frequently asked questions

What common issues should I look for in a BMW 4 Series?

Common issues in the BMW 4 Series include electrical problems, oil leaks, and issues with the cooling system. It's important to check for any warning lights on the dashboard and to review the service history.

How can I tell if the brakes need fixing?

If you notice squeaking, grinding noises, or a spongy brake pedal, it may indicate that the brakes need attention. Additionally, if the car pulls to one side when braking, it is advisable to have them checked.

Are there any specific recalls for the BMW 4 Series?

Yes, certain models of the BMW 4 Series have had recalls for issues such as airbag malfunctions and fuel system problems. Always check the vehicle's VIN against the latest recall information.

What should I do if my BMW 4 Series has a warning light on?

If a warning light appears, it's best to consult the owner's manual to identify the issue. If it indicates a serious problem, you should have the vehicle inspected by a qualified mechanic as soon as possible.

How often should I service my BMW 4 Series?

It is recommended to service your BMW 4 Series every 12 months or every 10,000 miles, whichever comes first. Regular servicing helps maintain performance and can prevent costly repairs.

What are the signs of a failing turbocharger in a BMW 4 Series?

Signs of a failing turbocharger include a loss of power, unusual noises, and excessive exhaust smoke. If you experience these symptoms, it is important to have the turbocharger inspected.

Can I perform basic maintenance on my BMW 4 Series myself?

Yes, basic maintenance tasks like changing the oil, replacing air filters, and checking tyre pressure can often be done at home. However, for more complex issues, it is advisable to seek professional help.