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Plan d’maintenance BMW X3 Long (G48)
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📖BMW X3 Long G48: extended-wheelbase luxury SUV requiring disciplined B48 cooling and chassis care

BMW X3 Long (G48) (2025-Présent)

Officialised in 2024 and launched commercially in 2025, the BMW X3 Long G48 was developed exclusively for the Chinese market to offer limousine-grade rear passenger legroom within a mid-size luxury SUV silhouette. Featuring an extended wheelbase, redesigned rear doors and bespoke executive seating with dedicated climate controls, it represents a distinctive luxury variant. Ensuring this stretched SUV performs flawlessly requires methodical BMW X3 maintenance, addressing cooling and chassis components.

Under the bonnet, the G48 is powered by the proven B48 turbocharged 2.0-litre four-cylinder petrol engine in 25L and 30L states of tune. Power is marshalled through the ubiquitous ZF 8-speed automatic gearbox and intelligent xDrive all-wheel drive. The stretched chassis and increased rear passenger accommodation add kerb weight, putting heightened demands on suspension bushings, brake friction material and tyre tread life.

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Owner notes

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

Reassuring points

Reliability
  • Remarkable rear passenger legroom and executive seating comfort on the extended long wheelbase.
  • Dependable B48 petrol engine paired with the smooth and reliable ZF 8-speed automatic transmission.
  • Refined suspension compliance and hushed acoustic insulation tailored for comfortable family touring.

Chronic weak spots

Keep an eye on
  • B48 cooling system: inspect primary expansion tank, electric water pump and oil filter housing seals.
  • ZF 8-speed transmission and xDrive: verify smooth gear selection and check for transfer case fluid seepage.
  • Brakes, tyres and running gear: heavy vehicle mass of the extended body accelerates pad and tyre wear.
  • Rear passenger amenities: inspect rear climate controls, seat heating switches and USB charging ports.
  • 12V electrical system: verify auxiliary battery voltage to prevent spurious electronic fault codes.

Critical deadlines

Do not miss
  • Engine oil and filter renewal: perform every 10,000 to 15,000 km or 12 months using BMW Longlife synthetic oil.
  • ZF 8-speed gearbox fluid service: renew transmission fluid and integrated filter pan every 80,000 to 100,000 km.
  • Brake fluid service: flush hydraulic fluid every 24 months to maintain firm, responsive braking.
  • Wheel alignment and tyre inspection: check geometry every 30,000 km to prevent uneven tyre wear.

Fréquences d'maintenance recommandées

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

Oil change

Every 15 000 km

Every 1 year

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

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.

X3 Long (G48)

Estimated average budget

Premium cost

Servicing a BMW X3 Long (G48) sits about 76% above the market average (premium positioning).

Simple oil change~140 €
Full service~490 €
Front brake pads~240 €
Tyres (set of 4)~640 €

Timing chain: no scheduled replacement.

* Indicative estimates for parts and labour.

Frequently asked questions about BMW X3 Long (G48)

What are the common problems on the X3 Long (G48)?▾
X3 Long (G48) owners should especially watch: B48 cooling system: inspect primary expansion tank, electric water pump and oil filter housing seals. ZF 8-speed transmission and xDrive: verify smooth gear selection and check for transfer case fluid seepage. Garajo includes these watch points so you can act early.
Does the X3 Long (G48) timing chain need to be replaced?▾
The X3 Long (G48) engine uses a timing chain designed to last the life of the engine, with no scheduled replacement. Listening for noise during a service is enough.
Where can I find the service book for the BMW X3 Long (G48)?▾
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your BMW X3 Long (G48).
How much does it cost to service a BMW X3 Long (G48)?▾
The service budget for a BMW X3 Long (G48) sits about 76% above the market average (premium positioning). Allow about 490 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which BMW X3 Long (G48) powertrain is best for town use?▾
This model is only available as petrol/diesel. Fuel mix: 2 petrol versions. In town, prefer the most economical, well-serviced petrol/diesel version.
Which BMW X3 Long (G48) powertrain should you choose if you mostly drive on the motorway?▾
This model is only available as petrol/diesel. Fuel mix: 2 petrol versions. On the motorway, prefer petrol/diesel versions with the best power-to-consumption compromise.
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