Overview
Community orientation
The F40 1-Series — the first front-wheel-drive 1-Series (UKL) — with transverse B38/B48 petrols and B47 diesels, Aisin automatic (DCT on M135i). Editorial summary, not a reliability rating; per-configuration facts are below.
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Filtered: B38 · 1.5L petrol 3-cyl (B38).
Known issues
Sorted by severity. Tap an issue to reveal its symptom, repair and what to check.
Engines & reliability
Tap a row to filter the issues to that engine.
Maintenance
Key service intervals — vary by engine and driving conditions.
ItemIntervalCost
Brake fluid~2 years
Engine oil and filter12,000–15,000 km