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Plan d’maintenance BMW 4 Series Convertible F33
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📖BMW 4 Series Convertible F33: an all-season metal hardtop cabriolet demanding roof hydraulic and timing chain vigilance

BMW 4 Series Convertible F33 (2014-2020)

Launched in early 2014, the BMW 4 Series Convertible F33 replaced the E93 with a stiffer chassis, wider stance and a refined three-piece electro-hydraulic folding metal roof. Offering coupe-like refinement in winter and open-air cruising in summer, its mechanical complexity requires comprehensive BMW 4 Series maintenance, particularly addressing the folding roof mechanism and engine health.

Early petrol models utilize the four-cylinder N20 engine (420i, 428i), which requires careful listening for timing chain and oil pump drive guide whining. In contrast, the six-cylinder N55 petrol (435i) and N57 diesels provide exceptional stamina when serviced properly. The acclaimed eight-speed ZF 8-speed automatic gearbox delivers buttery shifts but requires preventative fluid renewal rather than relying on lifetime fill claims.

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Owner notes

The reassuring points, known weak spots and deadlines you should not let slip.

Reassuring points

Reliability
  • Three-piece electro-hydraulic folding hardtop provides exceptional all-weather acoustic and thermal insulation.
  • Muscular straight-six N55 petrol and N57 diesel engines deliver effortless touring performance and longevity.
  • Outstanding eight-speed ZF automatic gearbox offering rapid shifts and relaxed motorway cruising efficiency.

Chronic weak spots

Keep an eye on
  • Retractable hardtop roof kinematics: check hydraulic pump fluid, roof alignment and lubricate weather seals.
  • N20 petrol timing chain: listen for whining or metallic rattle between 1,500 and 2,500 rpm indicating guide wear.
  • Rainwater ingress in boot: inspect battery compartment and amplifier recesses for standing moisture.
  • Electric coolant pump and thermostat: inspect for erratic operating temperatures and high fan speeds.
  • Suspension wear under convertible weight: inspect front control arm hydro-bushes and rear shock absorbers.

Critical deadlines

Do not miss
  • Brake fluid service: flush and renew every 24 months according to condition-based service indicators.
  • ZF 8-speed automatic gearbox fluid service: change fluid and integrated sump filter between 80,000 and 100,000 km.
  • Engine oil and filter change: every 15,000 km or 12 months using BMW LL-04 approved synthetic oil.
  • Convertible roof seals and drainage channels: clean, unblock and lubricate seals every 12 months.

Fréquences d'maintenance recommandées

Service markers for petrol/diesel versions. Exact intervals vary by engine and model year.

Oil change

Every 10 000 to 15 000 km

Every 1 year

Practical interval, shorter than the manufacturer's Longlife schedule to protect the engine

Service

Every 15 000 km

Every 1 year

Brake pads

Every 30 000 to 40 000 km

Every 2 years

Poids ou puissance élevés : usure des number platettes accélérée sur certaines versions

Timing belt / chain

Timing chain - watch this engine

Known chain wear or stretch: inspection advised, no fixed interval

Battery (12 V)

Every 50 000 km

Every 4 years

Diesel particulate filter (DPF)

Every 100 000 km

Automatic regeneration while driving: regularly do 20 min on a fast road; preventive clean around 100,000 km

EGR valve

Every 80 000 km

Valve that soots up easily on diesels: a preventive clean avoids power loss and limp mode

Powertrains and average consumption

Average consumption from manufacturer data for the versions available in this generation.

Petrol and diesel powertrains
▾

Petrol, diesel or LPG versions. The intervals shown cover the usual mechanical jobs.

Série 4 Cabriolet (F33)

Série 4 Cabriolet (F33, facelift 2017)

Estimated average budget

Premium cost

Servicing a BMW 4 Series Convertible F33 sits about 66% above the market average (premium positioning).

Simple oil change~155 €
Full service~500 €
Front brake pads~225 €
Tyres (set of 4)~545 €

Timing chain: no scheduled replacement.

* Indicative estimates for parts and labour.

Frequently asked questions about BMW 4 Series Convertible F33

What are the common problems on the 4 Series Convertible F33?▾
4 Series Convertible F33 owners should especially watch: Retractable hardtop roof kinematics: check hydraulic pump fluid, roof alignment and lubricate weather seals. N20 petrol timing chain: listen for whining or metallic rattle between 1,500 and 2,500 rpm indicating guide wear. Garajo includes these watch points so you can act early.
Does the 4 Series Convertible F33 timing chain need to be replaced?▾
The 4 Series Convertible F33 engine uses a timing chain, which is not normally replaced at a set interval. This engine has had known tension or wear issues, though: if it rattles from cold or during a major service, have the chain, tensioner and guides checked.
Where can I find the service book for the BMW 4 Series Convertible F33?▾
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your BMW 4 Series Convertible F33.
How much does it cost to service a BMW 4 Series Convertible F33?▾
The service budget for a BMW 4 Series Convertible F33 sits about 66% above the market average (premium positioning). Allow about 500 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which BMW 4 Series Convertible F33 powertrain is best for town use?▾
This model is only available as petrol/diesel. Fuel mix: 23 petrol versions ; 12 diesel versions. In town, petrol/LPG versions are usually the better match; diesel versions make more sense with regular long journeys.
Which BMW 4 Series Convertible F33 powertrain should you choose if you mostly drive on the motorway?▾
This model is only available as petrol/diesel. Fuel mix: 23 petrol versions ; 12 diesel versions. For regular motorway use, diesel versions of this model are usually the best fit (range and refinement at a steady speed).

Compatible engine oil

Which engine oil for BMW 4 Series Convertible F33?

These links are limited to the engines of this generation when oil data is available.

Unsure between two viscosities?5W-30 vs 0W-300W-20 vs 0W-305W-40 vs 0W-40
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