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Maintenance
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56 posts
Maintenance
· 4 min read
BMW AC smell: causes of bad air conditioning smells and how to fix them
A bad BMW AC smell is unpleasant and can affect comfort. Musty smells from the evaporator, cabin filters, blocked drains, sweet or burning smells, how to clean the system and prevention tips.
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BMW swirl flaps explained: the diesel intake issue and how to deal with it
BMW swirl flaps improve combustion in diesel engines, but older designs could fail and damage the engine. What they do, the engines affected, symptoms and safe solutions.
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· 4 min read
BMW AdBlue explained: how it works, refilling and common faults
Many modern diesel BMWs use AdBlue to reduce emissions. What it does, range warnings, how to refill it correctly, what happens if it runs out and the common faults of the AdBlue system.
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BMW DPF explained: diesel particulate filter, regeneration and problems
Every modern BMW diesel has a DPF. What the diesel particulate filter does, how regeneration works, why short trips cause problems, warning messages and how to keep your DPF healthy.
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BMW drive belt: symptoms of wear and when to replace it
The BMW drive belt powers important engine accessories. What it drives, the symptoms of wear, tensioners and pulleys, why a broken belt can be serious and when to replace it.
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· 4 min read
BMW break-in: how to run in a new BMW or M car
The first kilometres of a new BMW matter. Why the BMW break-in period is important, typical rev and speed limits, M car running-in checks, new tyres and brakes and mistakes to avoid.
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BMW vibration at speed: common causes and how to fix them
Vibration at certain speeds is a common BMW complaint. Wheel balance, damaged tyres and wheels, worn suspension bushings, brake discs, driveshaft parts and how to find the real cause.
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BMW oxygen sensor problems: symptoms, causes and replacement
A faulty BMW oxygen sensor can trigger the engine light and increase fuel consumption. What lambda sensors do, the symptoms of failure, the causes and how sensors are tested and replaced.
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BMW exhaust smoke: what white, blue and black smoke mean
The colour of BMW exhaust smoke says a lot about the engine. When white smoke is normal, what blue smoke means, black smoke and rich running, the common causes and what to do next.
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