BMW iX: Does This Big Electric SUV Stack Up Used?

The iX fleet is expanding fast: 44,635 are now taxed on UK roads, up 15,600 — a 53.7% rise. That surge in supply is the spine of this guide, because it changes the used calculus. More cars on the road means more choice, better parts availability and downward pressure on prices, and it lets us judge the iX on first-party evidence rather than launch hype.

The headline from that evidence is encouraging. On our reliability index the iX beats 71% of the 339 models we rank — top third — with a composite score of 80 drawn from 23,659 tests, combining pass rate, defect prevalence and cohort survival. We rate that high confidence. For a heavy, technology-dense electric SUV, it's a genuinely reassuring position.

What the MOT data tells us

The iX posts an 88% first-time MOT pass rate across 116 tests, placing it in the 73rd percentile of its peer set. The sample is modest — the iX is a recent car, so fewer examples have reached test age — but it's enough to show a consistent pattern rather than a one-off. So far, the iX ages without the widespread failures that drag down weaker models.

What commonly fails — and what it costs

The recurring faults are wear items, not catastrophic EV-specific problems. Tyres and wheels show up beyond 100,000 miles at £80 to £500 — and on a car this heavy, tyre wear is a real running cost to budget for. Driver's-view issues (wipers, washers, glass) also appear over 100,000 miles at £60 to £300. Suspension is the one to watch earlier, cropping up between 60,000 and 100,000 miles at £150 to £450.

The single most important check isn't on that failure list at all: battery health. Our owner notes flag that the iX's long range and rapid charging make it a genuine long-distance electric SUV — but only if the battery is sound, so insist on seeing state-of-health records before you commit.

The range and what it costs to insure

The entry xDrive40 (326PS, 195 miles of range, 3.2 mi/kWh) covers most needs and sits in insurance group 35. The xDrive50 (523PS, 280 miles) and post-facelift xDrive60 (544PS, 305 miles) add range and pace, while the M70 (659PS, 250 miles) is the performance flagship in group 41. Insurance is a sore point: the iX beats just 12% of the 339 models we track, so expect premiums at the steep end. Every iX is ULEZ compliant, so there are no clean-air-zone worries wherever you drive.

The catch: depreciation

Here's where the case turns, and you need to hear it plainly. The iX is a poor value-holder. After three years it retains just 50% of its value, and on our retention index it beats only 8% of 339 models — among the worst in the data. A car that listed at £89,500 new is the very reason you're shopping used: a three-year-old xDrive40 typically sits around £38,000, the xDrive50 around £44,800, the xDrive60 around £49,200, and the M70 around £64,900. That collapse is brutal for the first owner — and squarely in your favour as a used buyer.

The verdict

The growing 44,635-strong parc reflects a car worth owning: a top-third reliability ranking, an 88% MOT pass rate, ULEZ compliance, and a cabin our owners rate as top-tier for quality and refinement. The negatives are equally real and shouldn't be glossed over: 50% three-year retention that beats only 8% of rivals, insurance that beats just 12% of the field, weight-driven tyre costs, and the need for a verified battery state-of-health report. Buy used rather than new, check the battery and suspension, and the iX makes a strong, well-supported case as a durable long-distance electric SUV.