Our verdict
The cheapest way into the NERA generation of Husqvarna robotic mowers. Perfect for small-to-medium urban gardens where the headline is silence and zero effort. Pay extra for the EPOS satellite-navigation module if you want to skip the boundary wire installation.
Pros & cons
Pros
- NERA platform with EPOS satellite navigation option
- Quiet at 58 dB — usable overnight
- Automower Connect app
- 5-year battery warranty
Cons
- £1499 for 600m² is steep
- Boundary wire still required (NERA without EPOS upgrade)
- NERA Automower Connect+ subscription for full features
- Lawn under 200m² is overkill for the 405X
Full specs
| Type | Robotic |
|---|---|
| Cut width | 22 cm |
| Engine / Power | Husqvarna brushless |
| Weight | 9.5 kg |
| Deck | Composite |
| Self-propelled | Yes |
| Rear roller | No |
| Mulching | Yes |
| Cutting heights | 6 positions |
| Bag capacity | — |
| Suited to lawn | Small |
| Noise level | 58 dB |
Buying second-hand
£550-800 used for 2-3 year old examples. Always check the battery hours (logged in the app) — a 405X with 1500+ hours is approaching battery replacement (£180). The blades are tiny consumables — £8 for a pack of 9 lasts 6 months. Boundary wire breaks are the most common service call.
Where to buy the Husqvarna Automower 405X NERA
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Repair-cost reference
UK 2026 ballpark prices for the parts you're most likely to need on this mower. OEM is dealer-genuine; aftermarket is what you'll find on eBay or generic small-engine suppliers. Use these to sense-check any quote and to negotiate on used buys.
| Part / job | OEM | Aftermarket |
|---|---|---|
|
Replacement 22cm blade
Annual sharpening is free; replace when bent or cracked.
|
£24–£32 | £8–£12 |
|
Replacement battery
Wear part — typical 3–5 years to 80% capacity. The biggest single repair cost on any battery mower.
|
£90–£180 | £55–£120 |
|
Mainboard / control unit
Failure typically requires dealer fit. Not economic past 8 years on entry-tier robots.
|
£180–£320 | — |
|
Boundary wire repair (per splice)
Most common robotic fault — see /blog/robotic-mower-boundary-wire-repair.
|
£12 connector | £4 |
Fair-offer calculator
Tell us about a specific used listing for the Husqvarna Automower 405X NERA you're looking at. We'll compute a fair offer range from our used-market data and the condition signals you provide.
Calculations are guidance, not gospel. Used-market prices vary by region (Scotland is typically 10–15% cheaper than the South-East), season (October cheapest, March most expensive), and seller motivation.
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