GARAJO.CO.UK

Plan d’maintenance BMW 8 Series Coupé (G15)
Logo BMW

Online service book

Créer mon service book
Generations :Série 8 (E31)Série 8 (G15)Série 8 Cabriolet (G14 LCI, facelift 2022)Série 8 Cabriolet (G14)Série 8 Coupé (G15 LCI, facelift 2022)Série 8 Gran Coupé (G16 LCI, facelift 2022)Série 8 Gran Coupé (G16)All →
Logo BMW

📖BMW 8 Series Coupé G15: modern prestige grand tourer demanding disciplined cooling and tyre upkeep

BMW 8 Series Coupé (G15) (2018-2022)

Launched in 2018, the BMW 8 Series Coupé G15 revived Munich's prestige grand coupé badge with dramatic styling, a wide stance and a luxuriously appointed 2+2 cabin. Positioned above the 5 Series and 6 Series, it combined high-speed continent-crossing pace with genuine sports-car poise. Preserving this high-calibre grand tourer requires proactive BMW 8 Series maintenance, paying close attention to powertrain cooling, tyre management and electronic systems.

The launch powertrain portfolio offered the 840d xDrive powered by the twin-turbo B57 straight-six diesel, the rear-wheel-drive or all-wheel-drive 840i with the B58 petrol, and the blistering M850i xDrive powered by the 530 hp N63B44T3 V8. Power was managed exclusively by the seamless ZF 8-speed automatic gearbox. The chassis features standard adaptive dampers, active rear-wheel steering and rear-biased xDrive, making it exceptionally nimble despite its two-tonne mass.

Suivi free

Entrez votre number plate d’number plate afin de suivre freeement votre 8 Series Coupé (G15)

Garajo prépare votre garage et vous permet ensuite de suivre les maintenances, les rappels et les points à surveiller.

UKGB

Owner notes

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

Reassuring points

Reliability
  • Dramatic, low-slung coupé silhouette with outstanding high-speed stability and acoustic refinement.
  • The 840i B58 delivers the ideal balance of straight-six smoothness, agility and predictable ownership costs.
  • Silky ZF 8-speed gearbox and rear-biased xDrive provide tenacious all-weather traction.

Chronic weak spots

Keep an eye on
  • B57 diesel (840d): monitor EGR cooler recall status, DPF differential pressure and ensure regular motorway runs.
  • B58 petrol (840i): inspect coolant level in primary and secondary circuits and check oil filter housing.
  • M850i N63 V8: inspect hot-vee turbo coolant lines, engine oil consumption and auxiliary cooling fans.
  • ZF 8-speed transmission and xDrive: inspect transfer case fluid and ensure matching tyre circumferences.
  • Suspension and tyres: large M Sport wheels and aggressive camber cause rapid inner shoulder tyre wear.

Critical deadlines

Do not miss
  • Engine oil and filter change: renew every 10,000 to 15,000 km or 12 months with BMW Longlife-approved oil.
  • ZF 8-speed automatic gearbox service: renew fluid and integrated pan filter every 80,000 to 100,000 km.
  • Brake fluid renewal: flush and replace hydraulic fluid every 24 months regardless of mileage.
  • Wheel alignment and tyre check: inspect geometry every 30,000 km to prevent premature tyre replacement.

Fréquences d'maintenance recommandées

Petrol and diesel powertrains
▾

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

Hybrid powertrains
▾

Service markers for hybrid versions. Oil changes, brakes and system checks need to stay in step.

Oil change

Every 10 000 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 - designed to last, no scheduled replacement

Battery (12 V)

Every 50 000 km

Every 4 years

Powertrains and average consumption

This generation is available with several powertrains. The consumption figures come from manufacturer data for each version.

Petrol and diesel powertrains
▾

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

Série 8 (G15)

Hybrid powertrains
▾

HEV, MHEV and PHEV versions. They combine petrol/diesel servicing with hybrid-system checks.

Série 8 (G15)

Estimated average budget

Premium cost

Servicing a BMW 8 Series Coupé (G15) sits about 67% above the market average (premium positioning).

Simple oil change~180 €
Full service~520 €
Front brake pads~235 €
Tyres (set of 4)~495 €

Timing chain: no scheduled replacement.

* Indicative estimates for parts and labour.

Frequently asked questions about BMW 8 Series Coupé (G15)

Is servicing the same on every 8 Series Coupé (G15) version?▾
No. The 8 Series Coupé (G15) is available as petrol/diesel or hybrid depending on the version. The jobs differ by powertrain.
What are the common problems on the 8 Series Coupé (G15)?▾
8 Series Coupé (G15) owners should especially watch: B57 diesel (840d): monitor EGR cooler recall status, DPF differential pressure and ensure regular motorway runs. B58 petrol (840i): inspect coolant level in primary and secondary circuits and check oil filter housing. Garajo includes these watch points so you can act early.
How much does it cost to service a BMW 8 Series Coupé (G15)?▾
The service budget for a BMW 8 Series Coupé (G15) sits about 67% 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 8 Series Coupé (G15) powertrain is best for town use?▾
BMW 8 Series Coupé (G15) mix: petrol/diesel : 7 versions ; hybrid : 1 version. In town, prefer hybrid versions; they stay more efficient in frequent stop-start traffic. The range is mostly petrol/diesel (7 of 8).
Which BMW 8 Series Coupé (G15) powertrain should you choose if you mostly drive on the motorway?▾
BMW 8 Series Coupé (G15) mix: petrol/diesel : 7 versions ; hybrid : 1 version. For regular motorway use, diesel versions of this model are usually the best fit (range and refinement at a steady speed). The range is mostly petrol/diesel (7 of 8).

Compatible engine oil

Which engine oil for BMW 8 Series Coupé (G15)?

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-300W-20 vs 5W-30
← All Série 8 generationsAll BMW models

Ne ratez plus jamais un maintenance

Gérez l'maintenance de votre BMW 8 Series Coupé (G15) freeement.
Centralise your history and spending in a few clicks.Téléchargez le service book de votre BMW 8 Series Coupé (G15) en PDF à tout moment.

Créer mon carnet (Free)
Créer mon service book