BMW X4 review

Overview

The second X4 is a shape-led alternative to the X3 rather than a fundamentally different kind of vehicle. We select the UK 2018 G02 xDrive20d Sport with eight-speed automatic transmission, not the earlier F26 or a later mild-hybrid facelift. The original UK range called its entry trim Sport, so an imported xLine description should not be casually substituted. RoadMatch's review is original source-led ownership analysis, not a first-hand test. This diesel can suit drivers who want premium cabin presentation and relaxed cruising in a less upright silhouette. Its extra appeal is largely aesthetic; a buyer needing maximum family flexibility should compare the related X3 carefully before deciding the roofline is worth the compromise.

Exterior and interior

The G02's long sloping roof and slim rear lights are its clearest visual identifiers. Sport has a more restrained treatment than M Sport or M Sport X, but individual options and later cosmetic changes can confuse an advert. The UK launch guide supports leather upholstery and a conventional BMW cockpit with a separate screen and controller. Spend time checking seat fit, entry and the view to the rear, because attractive exterior proportions can affect ordinary manoeuvring. Inspect wheel edges, hatch alignment, window seals and interior switch surfaces. Bodywork and leather condition should be evaluated alongside the electronics. A car that photographs well may still need expensive work to deliver the premium experience it suggests.

Practicality

BMW quotes 525 litres with the rear seats upright and a maximum 1,430 litres folded. Standard split-folding backrests give the hatch some flexibility for long items, but the descending roof reduces room for tall cargo compared with a boxier SUV. Rear passengers should try headroom with the front seats in their normal positions, and families should demonstrate child-seat access rather than judging it from photographs. Bring the pushchair or pet crate that determines your purchase. The X4 retains five doors and meaningful luggage space; the issue is whether the shape serves your needs as well as the related X3. Its width and parking footprint deserve an equally practical trial.

Driving experience

Independent assessments generally recognise the G02's composed road manners while questioning how much its shape adds over the X3. The selected Sport diesel is not an M40d or an M Sport car on large optional wheels, so keep derivative differences visible when reading driving impressions. Try the actual vehicle on rough town roads, a faster route and normal corners, checking for harsh impacts, tyre noise and inconsistent tracking. All-wheel drive adds propulsion management, not immunity from poor tyres or slippery braking conditions. A quiet, controlled commute can be more valuable than a marketing promise of coupé-like handling. Choose the X4 because its driving position and responses suit you, not because the badge dictates sporting expectations.

Performance

The original UK launch table gives the xDrive20d 190 PS, approximately 187 bhp, and 400 Nm, with a manufacturer zero-to-62-mph claim of 8.0 seconds. This is the pre-mild-hybrid diesel, not a later engine update or one of the six-cylinder versions. Its eight-speed automatic and torque delivery provide a plausible basis for relaxed overtaking and motorway entry without using the highest-performance derivatives. Check engagement from cold, smooth changes and normal response under moderate load. Ask about tuning and gearbox work before deciding that an apparent performance upgrade is desirable. Manufacturer acceleration is not a RoadMatch measurement, and diagnostic evidence should carry more weight than a seller's enthusiastic demonstration.

Fuel economy

The 2018 UK documentation includes laboratory economy figures that vary with wheels and associated configuration. We omit a single MPG field because the exact selected car's wheel and homologation details have not been established. Our annual budget assumes 42 imperial mpg, a transparent planning input rather than an observed result. A diesel X4 has a more coherent role for sustained journeys than short repeated cold starts. Compare fuel savings with the cost exposure of emissions hardware, tyres and all-wheel-drive servicing. Verify registration-specific emissions-zone treatment and tax through official services. Historical NEDC or correlated values should not be merged with later WLTP numbers, and the brochure's original annual tax price is not today's bill.

Reliability

A good history should explain servicing and any previous warning messages with invoices rather than reassuring adjectives. Arrange a specialist inspection of the diesel emissions systems, cooling condition, leaks, suspension and driveline. Matching tyres matter on an all-wheel-drive car, and uneven wear may indicate alignment or suspension problems that an attractive advert will not reveal. Confirm maintenance requirements for the specific automatic transmission and transfer system rather than treating every BMW gearbox identically. Test the powered hatch, camera and navigation as well as the engine. Our moderate-confidence score is an editorial judgement, not a measured failure rate. Set aside a repair reserve and obtain estimates for faults before accepting them as harmless age-related quirks.

Safety

The exact authority context is the G02 X4 extension of the related X3's 2017 assessment. The published 2018 update explains that some testing could be carried over, rather than presenting a wholly new unrelated X4 result. We link that historical record without reproducing ratings or artwork and do not use a later BMW SUV's score. The period UK guide makes advanced adaptive assistance optional, so verify the actual packages before relying on them. Check belts, restraint warning lamps, tyres, windscreen repairs and signs of structural repair. Demonstrate child-seat installation with your equipment. Follow the government recall process and ask BMW to confirm VIN-specific campaign completion, because a model-level record cannot clear an individual vehicle.

Technology and features

The August 2018 UK specification supports standard cruise control, front/rear parking sensors, reversing camera and front-seat heating. That provides a useful everyday baseline, but the heated rear seats and upgraded assistance packages are different options. Apple CarPlay preparation appears as optional, with hardware and activation qualifications for later purchases; Android Auto is not promised on this early example. Test phone pairing, route entry, camera clarity and the controls you use frequently. Online services may depend on subscriptions and present compatibility. The physical rotary interface can appeal to drivers who dislike touch-only systems, but confirm that the fitted screen and software match the advert rather than assuming later facelift equipment from a similar-looking dashboard.

Running costs

The £15,000–£21,000 purchase allowance is an editorial estimate dated 3 October 2026, not a live valuation or copied commercial guide. At 8,000 miles, assumed 42 mpg and hypothetical diesel at £1.55 per litre, fuel is approximately £1,342. A rounded £200 tax provision and £900–£1,600 routine servicing, MOT and tyre allowance give about £2,500–£3,200 annually. Actual tax and individual insurance need separate checks; insurance-group data is omitted. Finance, depreciation and major repairs are excluded. The X4's depreciated purchase price does not reduce the cost of large tyres, transmission work or emissions-system repairs. Compare an inspection-led total budget with a less expensive or more practical alternative before committing.

Advantages and disadvantages