Credov's researched list of the 3 faults the BMW 1 Series F20 is known for (2012–2016), 3 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.
What to look for: Start the engine stone cold and listen for a rattle or grinding that fades after a few seconds.
Why it matters: A broken chain or jumped tooth can bend valves and wreck the engine; repairs commonly run NZ$2,000-$5,000.
What to look for: At cold start and 2,000 to 3,000 rpm, listen at the back of the engine for a rising whine or rattle.
Why it matters: A skipped chain can destroy the engine while driving; repairs commonly run NZ$3,500-$12,000, more if a new engine is needed.
What to look for: Cold start and listen at the gearbox end of the engine for a rattle or scraping lasting past a few seconds.
Why it matters: A snapped chain wrecks the engine and the repair needs the engine out; typically NZ$4,500-$9,000.
Got a question about a BMW 1 Series F20? Ask Credov: a noise, a warning light, a part or how to fix it.
On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.
Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.