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About the BMW 4 Series
AI-generatedThe BMW 4 Series launched in 2013 as a standalone coupé variant of the 3 Series, offering a more sporting and style-focused alternative to BMW's bestselling saloon. Available as a two-door coupé, convertible, and four-door Gran Coupé, the 4 Series combines elegant design with BMW's renowned driving dynamics. The range includes efficient four-cylinder diesels, smooth six-cylinder petrols, and high-performance M4 variants, all paired with rear or xDrive all-wheel drive configurations. The second generation arrived in 2020 with a controversial oversized kidney grille, but maintained the formula of premium materials, advanced technology, and engaging handling. With a focus on grand touring comfort rather than outright sportiness compared to predecessors, the 4 Series appeals to buyers seeking a stylish, well-equipped premium coupé. Build quality is generally excellent, though running costs can be higher than mainstream rivals, and complex electronics may prove expensive to repair outside warranty.
Known Issues
Known Issues
F32/F33/F36 (First Generation)
2013-2020
- Timing chain wear on N20 four-cylinder petrol engines, causing rattling noise on cold starts
- Turbocharger failure on 420d and 430d diesel models, particularly pre-2017
- Water pump leaks on various engine variants
- Electronic parking brake module failures requiring expensive replacement
- AdBlue system faults on diesel models causing warning lights and limited performance
- Infotainment system freezing or rebooting, often requiring software updates
- Sunroof drain blockages leading to water ingress in footwells
- Differential mounting bushes wearing prematurely on M Sport models
G22/G23/G26 (Second Generation)
2020-present
- Software glitches in iDrive 7 and 8 systems affecting various functions
- Mild hybrid system faults on 48V equipped models
- Paint quality concerns with thin clearcoat, particularly on metallic finishes
- Squeaking or creaking from panoramic sunroof mechanisms
- Wireless charging pad overheating and stopping mid-charge
- Rear-view camera image quality degradation in wet conditions
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Running Costs
Running Costs
Annual Fuel
£1,800-£2,800
Insurance Group
28-50
Average Service
£450
Cost Calculator
Typical Prices
£32,000 - £45,000
£24,000 - £35,000
£18,000 - £28,000
£12,000 - £18,000
Pros & Cons
Pros & Cons
Pros
- Excellent driving dynamics with precise steering and balanced handling
- High-quality interior with premium materials throughout
- Strong engine range from efficient diesels to powerful M4 variants
- Stylish and distinctive design, particularly the coupé body style
- Advanced technology and infotainment systems
- Strong residual values compared to mainstream brands
- Comfortable for long-distance grand touring
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Best & Worst Years
Best & Worst Years
Best Years
- 2019 - Final year of first generation with all updates and refinements, avoiding early engine issues while offering proven reliability before complex second-gen electronics
- 2018 - Mature first-generation model with resolved early issues, updated infotainment, and strong depreciation making used examples excellent value
- 2022 - Second-generation model with initial software issues resolved, offering latest technology and improved mild-hybrid efficiency without excessive mileage
Worst Years
- 2014 - Early first-generation models most affected by N20 engine timing chain issues and initial teething problems with various systems
- 2015 - Continued timing chain concerns on four-cylinder petrols and higher incidence of turbocharger failures on diesel variants
- 2021 - Launch year for controversial second generation with numerous software bugs, infotainment glitches, and early production quality inconsistencies
Buying Checklist
Engine5 items
- Listen for timing chain rattle on N20 engines during cold start
- Check for white smoke from exhaust on diesels indicating turbo issues
- Inspect for oil leaks around water pump and valve cover gaskets
- Test drive should show smooth acceleration with no hesitation or misfires
- Verify AdBlue system working correctly on diesel models with no warning lights
Did You Know?
Did You Know?
The BMW 4 Series name was chosen to differentiate the coupé from the 3 Series saloon, following BMW's even-numbered naming convention for coupés and convertibles.
The controversial oversized kidney grille on the 2020+ model is inspired by the iconic BMW 328 from the 1930s and the 3.0 CSL.
The M4 variant can accelerate from 0-60mph in just 3.5 seconds in Competition specification, matching many supercars.
BMW offered a limited 'Edition M Sport Shadow' in 2019 with exclusive frozen grey paint and carbon fibre trim.
Alternatives to Consider
Audi A5
7/10More conservative styling, Quattro all-wheel drive, slightly more practical interior and arguably better build quality, though less engaging to drive
Mercedes-Benz C-Class Coupé
More luxurious interior, smoother ride quality, and strong diesel engines, though not as sporty and can feel heavier through corners
Porsche Cayman
Mid-engined pure sports car with superior handling and driver engagement, but less practical, smaller, and higher running costs
Jaguar F-Type
More dramatic styling and characterful engines with superior exhaust note, though less practical and potentially higher maintenance costs
Lexus RC
Superior reliability record and lower running costs with excellent build quality, though less engaging dynamics and weaker diesel options
Owner Tips
- 1Service N20 petrol engines at BMW specialists familiar with timing chain issues - listen for rattling on cold starts
- 2Regularly clear sunroof drains to prevent water ingress; pour water down drains quarterly to check they're flowing freely
- 3Keep infotainment software updated through BMW dealers to avoid glitches and access latest features
- 4Check service history thoroughly - look for oil changes every 10,000 miles rather than extended intervals for longevity
- 5Budget for premium tyres; the 4 Series is sensitive to tyre choice and cheap alternatives significantly impact handling
- 6Consider extended warranty on high-mileage or older models as electronic repairs can be very expensive
- 7Use premium fuel (98 RON minimum) for petrol models to avoid engine knock and maintain performance
- 8Have differential and gearbox oils changed every 40,000 miles for smoother operation and longevity
Check a specific BMW 4 Series
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