iRobot Roomba Plus 405 Combo
Robot vacuum: the maker’s published limits, with the page each was read from. Robot vacuums are judged against your house on the guides below.
Product links on this page will be affiliate links when the site goes live; they do not change which units are picked. How that works.
Amazon listing verified as the bare unit at $700 on September 17, 2026; the link goes live with the site.
The limits the maker publishes
Every figure below was read from the maker’s page or manual, and the link beside it goes there. A limit the maker does not publish is absent, never guessed.
| Limit | Maker figure | Read from |
|---|---|---|
| Mop | two spinning pads | source |
| Self-emptying dock | yes | source |
| Warranty | 1 year | source |
| Height | 4.2 in | source |
| Dock bag lasts | 75 days | source |
| Washes its own mop | yes | source |
| Mapping | lidar | source |
Recall screen: no published CPSC recall names this exact model (screened 2026-09-17) (how we screen).
Living with it
What the maker’s own pages and manual say about owning this unit, and what owners report in public. Each line links to where it was read.
- Consumables
- The box ships with one spare AutoEmpty dust bag and one spare set of mop pads in addition to the ones installed on the robot and dock.irobot.com
- Battery
- iRobot's own Protect Plan terms describe the battery as a serviceable part: under that paid plan, iRobot will replace it if it no longer holds a charge per iRobot's own guidelines, once the standard warranty has ended.irobot.com
- Without the app or Wi-Fi
- Beyond the app and voice assistants, iRobot says a cleaning cycle can be started with no app or wifi at all by pressing the button on the robot itself.irobot.com
- Set-up
- iRobot says setup just requires placing the AutoWash dock on a hard floor at least 4 feet from any stairs before the robot maps the home through the app.irobot.com
- Maintenance
- iRobot's routine maintenance is wiping the bin, rinsing the dock's water tanks, cleaning the charging contacts and brushes, and swapping the filter every 3-6 months.irobot.com
- Warranty
- iRobot's Protect Plan page states that eligible iRobot products, this model included, carry a standard limited one-year manufacturer's warranty before any optional extended plan begins.irobot.com
- Known issue
- iRobot states the robot automatically steers around carpets whenever it is running in a combined vacuum+mop or mop-only mode, so it will skip rugs in those modes rather than mop them.irobot.com
- Camera and data
- iRobot says it encrypts stored data and limits access to it, and owners can delete their data before passing the robot on to a new owner.irobot.com
What owners and long-term reviewers report, from public threads and published reviews; not our own testing.
- Independent testing found the new single main-roller brush resists hair tangles far better than iRobot's older dual-roller design, with only 17% of test hair tangling versus about 50% on the old rollers.vacuumwars.com
- Testers considered the new AutoWash dock a real upgrade over iRobot's previous self-washing docks, which had been poorly rated.vacuumwars.com
- Owners can vacuum and mop a mixed hard-floor-and-carpet home in a single run because the mop pads reliably lift whenever the robot senses carpet.vacuumwars.com
- The redesigned Roomba Home app gives owners real-time robot monitoring and more granular controls than iRobot's previous app.vacuumwars.com
- The 405 has no obstacle-avoidance cameras or sensors at all, a feature that's now common on competing robots in its price range.vacuumwars.com
- It only has one mopping water level, and testers found it leaves floors excessively wet.vacuumwars.com
- Owners are likely to run into app bugs; reviewers found the companion app consistently buggy during testing and noted other users reporting the same.vacuumwars.com
- In deep carpet-cleaning tests it recorded the worst embedded-dirt pickup score the reviewer has ever measured on a Roomba.vacuumwars.com
- On flattened pet hair on carpet it picked up only about half the hair, the lowest score the reviewer has recorded for that test.vacuumwars.com
What independent testers found
We do not test units ourselves. These are figures and verdicts published by named testers, with the maker’s claim beside them where the tester gave it; where a tester relays owners’ reports rather than a measurement, the row says so.
| What | Finding | Tester |
|---|---|---|
| Debris pickup | 58% debris pickup in the deep carpet-cleaning test, versus a 75% average across tested robots | Vacuum Wars |
| Also noted | Only 17% of test hair tangled in the single roller brush in a 7-inch hair tangle evaluation, versus about 50% for iRobot's older dual-roller design | Vacuum Wars |
| Also noted | Navigation efficiency of 0.76 square meters per minute, a record for a Roomba model but still only 30th overall among robots tested | Vacuum Wars |
| Also noted | Scored 145 on the dried-on stain mopping test, far above the 93 category average | Vacuum Wars |
| Also noted | Left 5.20g of water behind on the floor after mopping, about 5x the amount left by the average robot tested | Vacuum Wars |
- Vacuum Wars concluded the 405 fell short in nearly every key area they test: below-average suction/airflow, the worst deep-clean and pet-hair pickup scores they've ever recorded for a Roomba, excessively wet mopping from its single water setting, no obstacle-avoidance sensors, and a still-buggy app. Vacuum Wars
- The reviewer ranked the 405 70th overall with a 1.66-star Vacuum Wars rating against a 2.8 average, despite having high hopes for iRobot's refreshed lineup going in. Vacuum Wars
Judged in
- Roborock vs. Roomba vs. eufy (The pick this page cannot judge, which is not a third place)