Honda Miimo HRM310IIAssistedCompare

Released 2017.04Reassessed 2026.09.02Compare

Honda Miimo HRM310

Name: Honda Miimo HRM310
Brand: Honda

An early entrant whose wire-guidance architecture became a liability as satellite navigation matured. The wire-guidance architecture reflects an earlier design era as the category shifted toward satellite navigation.

No list priceRetail price not tracked

Released 2017.04Reassessed 2026.09.02

Autonomy Ladder

Why Level II.

One five-rung scale, every category, from acting only on command to working unsupervised anywhere.

VGeneralized AutonomyAny task, any setting. No consumer robot has reached it.
IVEnvironmental AutonomyCopes with everyday clutter and frees itself, shown by independent testing.
IIIConditional AutonomyFinishes whole jobs in familiar spaces; struggles at the edges.
To reach Level IIIMost sessions finish without intervention. Rescue is occasional, not routine.
IIAssisted AutonomyThis robot

Honda Miimo HRM310 runs preset routines on its own, and the owner is its recovery system.

Navigation and control

Boundary wire perimeter guidance; selectable Random, Directional and Mixed cutting patterns, with automatic spiral cutting in longer or thicker grass
Why this level
- Boundary-wire navigation qualifies as Level II, Assisted Autonomy.
- The robot mows autonomously inside a perimeter a person installs and maintains, and a person retrieves it if it strands or the loop signal is lost.
- Cutting pattern is user-selectable between Random, Directional and Mixed, and the mower switches itself into a concentrated spiral when it meets longer or thicker grass before returning to the selected pattern.
- Pattern is a setting rather than a map: there is no GPS or vision-based positioning, so the mower holds no reference for where it has already been.
Autonomy dimension 40 / 100 · 2 independent sources reviewed, 1 from the maker
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources on file.

Provisional2 independent sources reviewed, 1 from the maker

Two to four independent sources reviewed. Gaps remain across source types. The word says how much we read. It is not a grade.

Independent sources reviewed2

Monitoring record2 sources

Sources behind the tracker entries following this robot.

From the maker, reviewed1

Specification sources1 source

Pages the published specifications were read from.

cdn.powerequipment.honda.comcdn.powerequipment.honda.com

Also monitored, nothing listed yet

Manufacturer documentation

Honda Automower product line documentation covering model HRM310 specs and market availability

How we evaluate evidence →

Human Readiness

Discontinued.

One question: what does buying this robot today walk you into? The state is computed from the record, and recomputed daily.

DiscontinuedThis robot

Honda Miimo HRM310 is discontinued. Remaining listings are old stock at uncertain prices, which no buying-today tier describes.

Listings under Availability are shown for reference, not as a purchase path.

On the record

Released April 2017; since discontinued
2 independent sources reviewed, 1 from the maker

The scale, for reference

Ready NowAssessed, with a clean record on file. A successor may be shipping; the page says so when it is.
New to MarketOn sale under 90 days; the ownership record is still forming.
WaitA successor is announced and has not shipped; re-read the decision when it arrives.
Known IssuesDocumented problems stand on the record; read the case before buying.

How we assess readiness →

Robovations Score

How this number was reached

47of 100

LimitedAt or above 4% of the 456 robots we scoreand 2% of the 112 scored robot lawn mowers

DeficientLimitedCapableStrongExemplary

What moved itpoints gained or lost against a typical robot

Held back by

Support longevity15−4.7
Software stability33−4.5
Routine maintenance38−3.6

Capability40% of the score61What it does without you.

Task completion16% of the score75

Evidence

The thread starter of "Miimo HRM310 schaltet sich bei 100% ab" on roboter-forum writes that his HRM310 "seit knapp 10 Jahren bisher keine Probleme gemacht hat und regelmäßig gewartet wurde" (has given no trouble for nearly 10 years and has been serviced regularly), mowing and returning to charge on its own across those seasons until the current shutdown fault appeared.

Coverage and navigation10% of the score50

Evidence

Owner Montfort1 on testberichte.de, a year into running a Miimo 310 (Honda's HRM310), calls it "gründlich" (thorough) and notes it runs almost 1.5 hours per session; it is a perimeter-wire machine with no retained map, so the area is covered by run time rather than by a plan that survives the run.

Edge-case recovery10% of the score45

Evidence

The roboter-forum owner of a 2015 HRM310 describes the docking cycle: it enters the station, makes contact, drives forward again with the rear wheels "durchdrehenden" (spinning in place, wearing both the wheels and the station base plate), reverses out, circles and repeats until "irgendwann berappelt sich der Miimo" (eventually it pulls itself together) and stays in. A separate reviewer on testberichte.de got the other outcome: "Miimo kreist heute mal wieder im Garten und verfehlt seine Ladestation" (circling the garden and missing its charging station), and scrapped the machine.

Operating envelope4% of the score72

Evidence

The same roboter-forum owner runs the HRM310 on 680 m2 with a swing, sandbox, trampoline, herb spiral, a narrow passage between two mowing areas, slopes and paved paths, and reports "alle diese Hindernisse packt unser Miimo eigentlich ganz gut" (it handles all these obstacles quite well), at the price of one set of traction wheels per season. Reviewer supidupi on testberichte.de documents the condition where it degrades: it "bleibt bei Nässe und leichtem Anstieg in Ecken oft hängen" (often hangs up in corners in the wet and on a slight incline), and there is no rain sensor to keep it in.

Dependability40% of the score35Whether it keeps doing it.

Field failure rate16% of the score48

Evidence

On testberichte.de, supidupi reports (a separate observation from the wet-corner one above) that "das teure Netzteil aus China fällt alle 1 – 1,5 Jhare regelmäßig aus" (the expensive power supply fails every 1 to 1.5 years) and that it is known to Honda as a weak point while the dealer sells a EUR 90 replacement rather than filing a goodwill claim, and reviewer spassauto's unit lost its charging station after three weeks. Against that, the roboter-forum owner had nearly ten trouble-free years before a shutdown fault that survived cleaned contacts, a substitute power supply and a new battery, so the mode is job-stopping and repairable with a stocked part, but not universal.

Software stability14% of the score33

Evidence

There is no update channel of any kind: no app, no Wi-Fi, no Bluetooth, start and scheduling are mechanical controls. Having nothing to update is not stability and earns nothing here. The control system is a deterministic wire-signal follower with selectable patterns, which cannot regress but also cannot be corrected, and no independent account of its behavior exists.

Support longevity10% of the score15

Evidence

The record states Honda ceased US market support and manufacturing in the early 2020s, that parts are increasingly difficult to source, and that official support is not available. Blades come from aftermarket suppliers if at all. A discontinued line with no parts channel scores low here however good the machine is, and this is that case without qualification.

Ownership burden20% of the score42What it asks of you.

Routine maintenance12% of the score38

Evidence

A weekly-cadence published list: weekly boundary wire inspection plus deck clearing, blade checks every two to four weeks, monthly dock contact cleaning with per-cycle docking verification, an annual multimeter continuity test on the buried loop, and seasonal cleaning and indoor storage of mower and dock. Every item is hands-on and the wire chore recurs weekly rather than seasonally.

Consumables8% of the score47

Evidence

Blades every two to four weeks is a short interval, and the supply is the problem rather than the price: with official parts unavailable, replacement depends on third-party suppliers the record describes as merely possible. A consumable whose channel is not assured over the service life is a different proposition from one sold in multipacks by the maker.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year cost$1,700

Lower third for robot mowers at purchase and misleading as a total. Roughly $900 on the used market, since no new-unit channel exists, plus about $650 of aftermarket blade sets across five years at the two to four week interval, and one aftermarket battery. The number assumes third-party parts stay available for five years, which is the assumption the record explicitly declines to make.

Data postureLocal

Core function needs no account and no network.

What leaves the homeNot documented

Read the full methodology →

FIT CHECK

Will the Honda Miimo HRM310 work on your yard?

Describe your yard using the controls. Each choice reads the spec sheet for you, flagging where the Honda Miimo HRM310 is built for your space and where it isn’t.

Yard size

Terrain

Grass type

Boundary setup

See every robot mower suited to these conditions

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

OWNERSHIP

Living with it.

Wire boundary system is robust; mechanical reliability was Honda-standard for the era; parts support and software updates are no longer available.

Unprovenowner-reported arc

The record so far

No major recalls documented during the product's active market period. Wire-guidance architecture has inherent reliability advantages (fewer sensors to fail). Post-discontinuation support means no firmware patches or driver updates for any issues.

What goes wrong4 documented · 0 self-recover

Common

Blade wear and sharpness lossUneven cutting, scalping on slopes, increased motor load

Owner fixManual blade replacement every 2-4 weeks depending on grass density and property size.

Occasional

Robot exits perimeter or stops mid-session until wire is located and repaired

Owner fixWire continuity testing with a multimeter; re-burial or splicing required.

Occasional

Dock charging contacts corrosionIntermittent charging failure, battery discharge between sessions

Owner fixContact cleaning with fine grit or emery cloth after rain or seasonal use.

Occasional

Complete mobility loss until replacement motor obtained

Owner fixParts no longer available from Honda; third-party replacement may be possible but not officially supported.

Upkeep routine

Weekly52×/yr

Inspect for visible breaks or damage; clear grass clippings from deck.

Monthly12×/yr

Check the and replace them when cutting quality drops. They are flip-and-replace razors, not sharpened items; grinding an edge back removes the coating on a machine that runs unattended.

Clean dock charging and verify docking success after each mowing cycle.

Seasonal4×/yr

Clean the deck and underside, then store the mower and dock indoors over winter in a cool, dry place, at the charge level Honda specifies for storage.

Yearly1×/yr

Check loop continuity with multimeter; repair buried wire if intermittent detected.

Step-by-step fixes

Blades Not Spinning or Not Cutting?Boundary Wire Break Cutting Uneven or Scalping the Lawn?All robot mower guides

Safety notes1 caution · 1 note

CautionSpinning blade during automatic operationRobotic mowing occurs without human supervision. Blade contact risk for pet paws or loose debris approaching the unit.
No official support or replacement partsProduct discontinued; parts sourcing and repairs are DIY or aftermarket only.

SPECIFICATION

The full spec sheet.

Manufacturer-published figures, measured against every robot lawn mower we track.

Dimensional drawing

Key specificationsManufacturer-publishedSources: Product page

FootprintThe width, depth and height of the robot itself, without its dock.: 21.7 × 25.4 in, 10.8 in tall•
WeightThe robot alone, without its dock, as the maker states it.: 25.6 lbs•
BatteryStored energy in watt-hours; a larger pack runs longer, not harder.: 40 Wh · Li-ion•
Cutting width: 8.7 in•
Cutting height range: 0.8-2.4 in•
Max area: 16,100 sq ft
Max slope: 47%•
Boundary method: Buried boundary wire
Drive layout: Rear-wheel drive, two driven rear wheels
Blade system: Three-blade pivoting disc

Where it lands · position among 134 robot lawn mowersThis robotMedianTypical range

RuntimeThe maker's stated running time on one charge, at a standard setting.30min

30 min240 min

Bottom of range

NoiseLoudness at the maker's stated distance, in decibels; ten more decibels reads as about twice as loud.58dB

50 dB75 dB

Near median

Charge timeTime from empty to full on the dock, as the maker states it.30min

30 min300 min

Bottom of range

WeightThe robot alone, without its dock, as the maker states it.25.6lbs

13 lbs88.2 lbs

Near median

Position shows where the figure sits across the tracked category, not a quality judgment.

Official referencesProduct page

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Aug 2026 · AssessmentRobovations Score rescored under v4.2: 62 → 47
Jul 2026 · AssessmentRobovations Score recorded at 62 of 100
Nov 2023 · NewsHonda Miimo line exits North American dealer service network
Apr 2017 · ReleaseHonda launches Miimo HRM310 robotic lawn mower in the United States

Questions

What people actually ask.

5 answered

OperationDoes the Honda Miimo HRM310 require a boundary wire to operate?

Yes. The wire must be installed in a loop at the yard perimeter and buried or secured at the surface. Installation takes 2-4 hours depending on yard size and perimeter shape. This is a fixed setup; virtual boundaries are not supported.

OperationWhat is the battery runtime and can it cover a half-acre property in one charge?

Runtime is about 30 minutes per charge, followed by about 30 minutes on the dock. Miimo is built around that cycle rather than around finishing a lawn in one pass: it mows, returns, recharges and goes back out on a schedule through the day. A half acre is larger than its rated working area, so the second half of the question is no, and not by lengthening the schedule either.

OperationWhat happens if the HRM310 crosses the boundary wire or gets stuck?

If the mower crosses the wire boundary, it stops autonomously when it detects the signal. Manual retrieval and repositioning inside the boundary is required. Self-righting or recovery is not automatic.

OwnershipIs the HRM310 still supported by Honda, and are replacement blades available?

Honda ceased US market support and manufacturing of the HRM310 in the early 2020s. Parts are increasingly difficult to source; third-party blade replacements may be available from aftermarket suppliers, but official support is not available.

CompatibilityDoes it require an app or wireless connectivity to operate?

No. The Miimo operates entirely based on the boundary wire loop. No smartphone app, Wi-Fi, or Bluetooth connectivity is needed. Start and scheduling are mechanical controls only.

Cite & Embed

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Robovations. "Honda Miimo HRM310: Autonomy Level II (Assisted Autonomy)." Autonomy Ladder™, assessed September 2026. https://robovations.com/robots/honda-miimo-hrm310/

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Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Honda Miimo HRM310 and Stihl iMow 6 EVO side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Worx Landroid S 20V, Husqvarna Automower 115H, Husqvarna Automower 305.

For browsers

See every Level II.

Every robot we’ve classified at assisted autonomy. Sorted by readiness, score, and price. Filter by category, manufacturer, or release date.

Browse every Level II robot

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Honda Miimo HRM310

Will the Honda Miimo HRM310 work on your yard?

Living with it.

The full spec sheet.

How the assessment has moved.

What people actually ask.