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Plan d’maintenance BMW 6 Series Convertible F12
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📖BMW 6 Series Convertible F12: an ultra-refined open-top GT requiring powertrain and roof seal care

BMW 6 Series Convertible F12 (2011-2018)

Launched in early 2011 ahead of the coupe, the BMW 6 Series Convertible F12 brought sweeping elegance, a wider, lower stance and peerless high-speed refinement to the open-top grand tourer class. Retaining the iconic flying buttress soft-top with an electrically retractable vertical glass window, it offers whisper-quiet cruising when closed. Long-term reliability demands dedicated BMW 6 Series maintenance tailored to its specific petrol or diesel powertrain.

The six-cylinder 640i (N55) and twin-turbo diesel 640d (N57) represent the sweet spot for mechanical stamina, pairing brilliantly with the eight-speed ZF 8-speed automatic gearbox. Conversely, the twin-turbo 650i V8 (N63) runs extremely hot in its 'hot-vee' turbo configuration, demanding meticulous checks for turbo coolant line leaks and heavy oil consumption. The electro-hydraulic soft-top roof cycles in 19 seconds but requires clean drainage channels to prevent boot moisture.

Inspect frameless door weatherstripping for wind whistle at speed, and examine front lower wishbones for worn hydro-bushes under the car's substantial two-tonne kerb weight.

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Owner notes

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

Reassuring points

Reliability
  • Striking, low-slung proportions matched with superb multi-layer acoustic insulation from the fin-style roof.
  • Exceptional long-distance cruising range and muscular stamina from the 640d twin-turbo diesel.
  • Silky eight-speed ZF automatic gearbox delivering seamless, rapid shifts and motorway efficiency.

Chronic weak spots

Keep an eye on
  • N63 twin-turbo V8 hot-vee: check for brittle plastic turbo coolant lines, valve stem seal wear and high oil consumption.
  • N55 640i cooling and oil gaskets: inspect electric water pump, thermostat and oil filter housing gasket for leaks.
  • Soft-top drainage channels: clear roof storage compartment drains to prevent water entering amplifier wells.
  • ZF 8-speed automatic gearbox: verify smooth shift quality and plan fluid renewal on higher-mileage examples.
  • Front suspension lower wishbones: heavy front-end mass wears out hydro-bushes, causing braking vibration.

Critical deadlines

Do not miss
  • Brake fluid service: flush and replace every 24 months according to manufacturer intervals.
  • ZF 8-speed automatic gearbox fluid service: change fluid and integrated pan filter between 80,000 and 100,000 km.
  • Engine oil and filter change: every 15,000 km or 12 months with BMW Longlife-04 approved synthetic oil.
  • Soft-top weatherstrips and vertical glass seals: lubricate and inspect twice annually.

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 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 6 Cabriolet (F12 LCI, facelift 2015)

Série 6 Cabriolet (F12)

Estimated average budget

Premium cost

Servicing a BMW 6 Series Convertible F12 sits about 79% above the market average (premium positioning).

Simple oil change~180 €
Full service~520 €
Front brake pads~240 €
Tyres (set of 4)~590 €

Timing chain: no scheduled replacement.

* Indicative estimates for parts and labour.

Frequently asked questions about BMW 6 Series Convertible F12

What are the common problems on the 6 Series Convertible F12?▾
6 Series Convertible F12 owners should especially watch: N63 twin-turbo V8 hot-vee: check for brittle plastic turbo coolant lines, valve stem seal wear and high oil consumption. N55 640i cooling and oil gaskets: inspect electric water pump, thermostat and oil filter housing gasket for leaks. Garajo includes these watch points so you can act early.
Does the 6 Series Convertible F12 timing chain need to be replaced?▾
The 6 Series Convertible F12 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 6 Series Convertible F12?▾
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your BMW 6 Series Convertible F12.
How much does it cost to service a BMW 6 Series Convertible F12?▾
The service budget for a BMW 6 Series Convertible F12 sits about 79% above the market average (premium positioning). Allow about 520 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which BMW 6 Series Convertible F12 powertrain is best for town use?▾
This model is only available as petrol/diesel. Fuel mix: 11 petrol versions ; 4 diesel versions. In town, petrol/LPG versions are usually the better match; diesel versions make more sense with regular long journeys.
Which BMW 6 Series Convertible F12 powertrain should you choose if you mostly drive on the motorway?▾
This model is only available as petrol/diesel. Fuel mix: 11 petrol versions ; 4 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 6 Series Convertible F12?

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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