About the BMW 1 Series
AI-generatedThe BMW 1 Series is a premium compact hatchback that offers rear-wheel drive (up to 2019) or front-wheel drive (2019 onwards) in a practical package. Available in 3-door and 5-door configurations until 2019, and exclusively 5-door from the F40 generation onwards, it combines BMW's renowned driving dynamics with everyday usability. The 1 Series competes against the Audi A3 and Mercedes A-Class, offering a sporty alternative in the premium hatchback segment. Through its generations, the 1 Series has evolved from the E87/E81 (2004-2011) through the F20/F21 (2011-2019) to the current F40 (2019-present). Engine options range from efficient three-cylinder petrols and diesels to the potent M135i and M140i performance variants. The switch to front-wheel drive in 2019 was controversial among enthusiasts but improved interior space and practicality. Build quality is generally excellent, with premium materials throughout and BMW's iDrive infotainment system providing comprehensive connectivity.
Generations
Known Issues
Known Issues
E87/E81 (2004-2011)
2004-2011
- N47 diesel engine timing chain failure - can cause catastrophic engine damage
- Electric power steering pump failures causing heavy steering or warning lights
- Rear subframe cracking on high-mileage examples
- Water pump failures on petrol engines
- Door lock actuator failures causing central locking issues
F20/F21 (2011-2019)
2011-2019
- N47 and B47 diesel timing chain issues (early models)
- Turbocharger failures on diesel models around 70,000-100,000 miles
- EGR valve and cooler failures on diesels causing limp mode
- Coolant leaks from expansion tank and water pump
- Electronic parking brake module failures
- Automatic gearbox mechatronic unit issues causing erratic shifting
F40 (2019-present)
Photo by George Blatchford on Pexels
Running Costs
Running Costs
Annual Fuel
£1,400-£2,200
Insurance Group
18-35
Average Service
£350-£550
Cost Calculator
Typical Prices
£22,000 - £32,000
£17,000 - £25,000
£13,000 - £19,000
£6,000 - £11,000
Pros & Cons
Pros & Cons
Pros
- Engaging driving dynamics with excellent handling balance
- Premium interior quality and build
- Wide range of efficient and powerful engines
- Strong residual values compared to non-premium rivals
- Practical boot space and reasonable rear legroom (especially F40)
- Comprehensive safety equipment and technology
Cons
- Diesel engine reliability concerns, particularly timing chains
Photo by HRK Gallery on Pexels
Best & Worst Years
Best & Worst Years
Best Years
- 2019 - Final year of rear-wheel-drive F20/F21 generation with all issues resolved, plus refined engines and updated technology. M140i particularly desirable.
- 2021 - F40 generation with early teething issues resolved, improved infotainment, and more reliable B48 petrol engines. Good balance of modern tech and dependability.
- 2017 - Facelift F20/F21 model with updated styling, improved interior, and more efficient engines. Most timing chain issues resolved by this point.
Worst Years
- 2012 - Early F20 models with problematic N47 diesel engines prone to timing chain failure. First year production quality issues also present.
- 2007 - E87 models affected by numerous electrical gremlins, power steering failures, and early N47 diesel issues. Pre-facelift interior also dated quickly.
- 2020 - First full year of F40 production with various software bugs, teething issues with new platform, and limited availability during pandemic affecting quality control.
Buying Checklist
Engine6 items
- Listen for timing chain rattle on diesel cold starts
- Check for excessive smoke from exhaust on diesels
- Verify no oil leaks from valve cover or sump
- Check coolant level and look for leaks around expansion tank
- Test turbo response - should boost smoothly without hesitation
Did You Know?
Did You Know?
The 1 Series was BMW's first and only rear-wheel-drive hatchback until 2019, offering unique driving dynamics in its class
The M140i's 3.0-litre straight-six engine produces 340bhp, making it one of the most powerful hot hatches ever sold
BMW sold over 2 million 1 Series vehicles between 2004 and 2019
The F40 generation shares its platform with the MINI Clubman and BMW 2 Series Gran Coupe
Alternatives to Consider
Audi A3
7/10More refined interior, quattro all-wheel drive available, slightly more practical but less engaging to drive
Mercedes-Benz A-Class
7/10More luxurious cabin, advanced MBUX technology, better ride comfort but higher running costs
Volkswagen Golf GTI
Similar performance to 130i/135i, more reliable, lower running costs but less premium badge appeal
MINI Cooper S
Shares engines with 1 Series, more characterful styling, lower price but less practical
Owner Tips
- 1On diesel models, check for timing chain rattle on cold starts - walk away if present as repairs cost £2,000-£3,000
- 2Ensure full BMW service history, particularly for timing chain and turbo-related work on diesels
- 3Budget for run-flat tyres which are expensive to replace (£150-£250 per tyre)
- 4Check the Electronic Parking Brake functions correctly - failures cost £500-£800 to repair
- 5Inspect for coolant leaks around the expansion tank and water pump
- 6Verify all electronics work including iDrive, parking sensors, and adaptive headlights
- 7M Sport models offer better residuals but have a firmer ride - test drive both
- 8Consider extended warranty for diesel models, especially those over 60,000 miles
- 9
Check a specific BMW 1 Series
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