Nuki Smart Lock Pro (4th Generation) review
Households who want to keep their existing BS3621-rated cylinder in place while adding WiFi-connected smart access with Matter support.
By Tom Calder · Updated 24 July 2026 · Price checked against our tracker
The more insurance-friendly of the two Nuki locks on test: it clamps onto the existing thumbturn rather than replacing the cylinder, so a BS3621-rated lock underneath stays exactly as it was. Built-in WiFi and Matter support mean no separate bridge is needed, and at £189 it undercuts the Ultra by a meaningful margin.
Confirmed live on Amazon UK as of 24 Jul 2026 for the current 'Nuki Smart Lock Pro (Euro Profile)' listing, a 'limited time deal' 17% off the £229 RRP.
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- Clamps onto the existing thumbturn without replacing the cylinder, so any current BS3621-rated lock stays functional underneath
- Built-in WiFi and Matter (over Thread) support without a separate bridge
- Around £56 cheaper than the Ultra at current discounted pricing (£189 vs £245)
- The previously sold '4th generation'-labelled listing is discontinued; current stock is the same physical design sold simply as 'Nuki Smart Lock Pro (Euro Profile)', so double-check you're buying the current listing
- Nuki itself makes no BS3621 or insurance-approval claim for the unit
- Full PIN/fingerprint entry needs the separately sold Keypad 2
Key specs
| Type | Clamp-on — existing euro-cylinder stays in place |
| Access methods | App, integrated WiFi, Matter, optional keypad |
| Battery life | Rechargeable Power Pack, ~6 months claimed |
| Insurance | Clamp-on — existing BS3621 lock underneath stays functional |
Our rating is a considered spec-and-evidence verdict: we verify every specification against at least two independent sources, track the UK price daily, and say plainly who a product isn't for. Commissions never change a rating. Read the full methodology →
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