The Infiniti EX was one of the earliest compact luxury crossovers officially sold in Britain. Smaller and sleeker than the FX, it combined a rear-biased all-wheel-drive chassis with coupé-like styling, a lavish cabin and either petrol or V6 diesel power. The later QX50 name arrived when Infiniti reorganised its model range, but the underlying first-generation car remained closely related to the EX.
UK sales were always modest. That scarcity, plus Infiniti’s withdrawal from Western Europe, now makes the EX30d and early QX50 a genuinely unusual alternative to a BMW X3, Audi Q5 or Volvo XC60.
UK history
The EX reached Britain during Infiniti’s first European expansion. Early EX37 models used a 3.7-litre naturally aspirated petrol V6, but the important UK version was the EX30d introduced in 2010. Infiniti expected the diesel to account for most British sales because it offered stronger economy and abundant low-speed torque.
From 2014 Infiniti’s global naming strategy turned the EX into the QX50. British examples of the renamed model are particularly scarce, and buyers should establish whether a car was officially supplied here or imported later.
Engine and performance
The EX30d uses a 2,993cc turbocharged V6 diesel producing 238PS and 550Nm at 1,750rpm. Drive goes through a seven-speed automatic transmission to Infiniti’s intelligent all-wheel-drive system. Period figures quoted 0-62mph in about 7.9 seconds and a 137mph maximum.
The EX37 petrol uses Infiniti’s 3,696cc VQ-series V6, producing approximately 320PS. It is smooth and eager but thirsty, which explains why relatively few were sold in Britain.
| Model | Engine | Output | Character |
|---|---|---|---|
| EX30d | 3.0 V6 turbo diesel | 238PS / 550Nm | Strong torque and the main UK choice |
| EX37 | 3.7 V6 petrol | 320PS / 360Nm | Smoother, faster and much thirstier |
What is it like to drive?
The EX feels more like a raised grand tourer than a conventional SUV. The driving position is lower, body movement is well controlled and the rear-biased transmission gives it a more sporting balance than most rivals of its period. The diesel is quiet once warm and the automatic generally suits its broad torque delivery.
The trade-off is practicality. Rear legroom is limited, the coupé roofline restricts headroom and the approximately 340-litre boot is smaller than those of mainstream rivals. Electric folding rear seats and the available Around View camera system add useful theatre.
Infiniti EX30d common problems and checks
- Diesel emissions equipment: cars used mainly for short trips may suffer DPF, EGR or intake contamination. Confirm regular motorway use and scan for stored faults.
- Automatic gearbox: check for prompt engagement, smooth cold shifts and clean acceleration without flaring revs.
- Cooling and oil leaks: inspect the V6 diesel carefully around hoses, intercooler plumbing and the underside.
- All-wheel drive: mismatched tyres can stress the system. All four should be an appropriate matching set with similar tread depth.
- Electronics: test the Around View cameras, navigation, Bose audio, electric seats, powered steering column and tailgate functions.
- Suspension and brakes: listen for worn bushes or wheel bearings and check for seized calipers, scored discs and uneven tyre wear.
Bodywork and interior
Look for corrosion on the subframes, suspension hardware and brake pipes rather than assuming the smart outer panels tell the whole story. Large wheels are easily kerbed and replacement lamps or body trim can be difficult to source.
The cabin should feel solid and expensive. Worn driver’s-seat bolsters are common on high-mileage cars, but damaged switchgear, failed screens and missing trim deserve more caution because model-specific replacements can be scarce.
Servicing and ownership
Routine mechanical items have Nissan links, but the Renault-Nissan V9X diesel and Infiniti electronics reward specialist knowledge. Insist on invoices rather than stamps alone. Correct oil, regular coolant changes and timely transmission servicing are sensible precautions even where a schedule describes fluids as long-life.
Fuel use, road tax, insurance and 18- or 19-inch tyres make this a premium car to run despite low purchase prices. Check recall completion using the VIN and official recall services.
Which version should you buy?
The EX30d is the logical UK choice if it has a clean emissions system and a convincing long-distance service history. The EX37 is more charismatic and avoids diesel hardware, but its rarity and fuel appetite make it a specialist purchase. Condition is more important than trim level.
Why it deserves recognition
The EX arrived before coupé-shaped premium crossovers became commonplace. Its combination of V6 power, rear-biased all-wheel drive and high equipment levels was distinctive, while tiny UK sales have made survivors far rarer than the German cars it challenged.
Frequently asked questions
Was the Infiniti EX30d officially sold in the UK?
Yes. UK sales began in 2010, with three trim levels and the 238PS V6 diesel.
Is the QX50 the same car?
The first-generation EX was renamed QX50 under Infiniti’s later naming system. Do not confuse it with the unrelated second-generation QX50 sold in other markets.
Is the EX30d practical?
It seats five but rear space and boot volume are modest for an SUV. It suits buyers who prioritise style and road manners over maximum carrying capacity.
