# iRobot Roomba Plus 405 Combo review

iRobot's LiDAR combo with spinning mop pads and a pad washing dock

- Our score: not scored yet
- Price: $800 (checked Oct 31, 2026)
- Status: on sale
- Best for: hard floor homes on a deep discount
- Skip if: you have carpet, pets or cables on the floor
- HTML version: https://robotsforthat.com/robot/irobot-roomba-plus-405-combo/

## Verdict

The Plus 405 Combo gives you LiDAR mapping, lifting spin mops and a dock that empties and washes pads for about $800. Both independent tests we read were unimpressed: weak measured suction, poor carpet and pet hair results, wet floors and no obstacle avoidance. Hard floor homes that want the iRobot app can consider it on a deep sale; most buyers should compare other docks first.

## Pros

- Dock empties, washes and dries mop pads
- LiDAR maps quickly and stores 4 maps
- Mop pads lift on carpet
- Single brush roll resisted hair wrap in testing

## Cons

- Very low measured suction
- Poor carpet and pet hair pickup
- No obstacle avoidance
- Leaves floors wet
- Loud dock emptying

## Specs

- suction: iRobot claims 70x the suction of Roomba 600 series, with 4 levels; Vacuum Wars measured 0.13 kPa against a 0.83 kPa average
- navigation: ClearView LiDAR, maps about 1,000 sq ft in 9 minutes and stores up to 4 maps (iRobot); Vacuum Wars measured 0.76 m2/min against a 0.70 average
- obstacle avoidance: No obstacle avoidance sensors (Vacuum Wars); BestReviews saw it tangle on cords twice in one run
- mopping: DualClean spinning pads at 200 RPM with SmartScrub and auto lift on carpet (iRobot); Vacuum Wars scored 145 on dried stains against a 93 average but found it left 5.20 g of water against a 1.01 g average
- self empty: Yes, bagged, up to 75 days based on one run per week (iRobot)
- dock features: AutoWash dock empties the bin, washes and dries the pads and runs a self cleaning water cycle (iRobot); Vacuum Wars notes no hot water wash or hot air drying
- dustbin: 0.1 gal robot bin (Best Buy listing)
- height: 4.2 in; robot is 14.1 x 13.8 x 4.2 in and 9.06 lb (iRobot)
- pet hair: Vacuum Wars measured 50% flattened pet hair pickup on carpet against a 66% average and 17% hair wrap; BestReviews saw 90% to 95% faux fur pickup on hard floors but under 50% on carpet
- app: Roomba Home app with routines, Clean Zones and Keep Out Zones; works with Alexa, Siri and Google Assistant (iRobot); Vacuum Wars and BestReviews called the app buggy or basic
- noise: Dock emptying measured 87.8 dBA by Vacuum Wars and 80 to 85 dB by BestReviews

## Safety

- recalls: No recall found as of 2026-10-30 (web search of cpsc.gov for robot vacuum recalls; CPSC database not searched by brand)
- fcc: Not checked
- company status: Restructured

## Questions buyers ask

### Does the dock wash the mop pads?

Yes. iRobot says the AutoWash dock washes and dries the pads and runs a self cleaning water cycle. Vacuum Wars notes it does not use hot water or hot air.

### Will it avoid cords and socks?

No. Vacuum Wars found no obstacle avoidance sensors, and BestReviews saw it tangle on cords twice in one run.

### How often do I change the bag?

iRobot says the dock holds up to 75 days of debris based on one run per week.

## Sources

1. [iRobot US store: Roomba Plus 405 Combo, white](https://www.irobot.com/en_US/roomba-plus-405-combo-robot-plus-autowash-dock/G185220.html)
2. [iRobot US store: Roomba Plus 405 Combo, black](https://www.irobot.com/en_US/roomba-plus-405-combo-robot-plus-autowash-dock/G185020.html)
3. [iRobot 2025 fast facts sheet: 405 Combo and AutoWash dock](https://filecache.mediaroom.com/mr5mm_irobot/182313/download/2025%20Fast%20Facts%20Sheet_405%20Combo%20Robot%20and%20AutoWash%20Dock.pdf)
4. [Vacuum Wars: Roomba Plus 405 Combo review](https://vacuumwars.com/roomba-plus-405-combo-review-great-hopes-ok-results)
5. [BestReviews: iRobot Roomba Plus 405 review](https://products.ktla.com/articles/home/vacuums/irobot-roomba-plus-405)
6. [Best Buy: Roomba 405 Combo listing](https://www.bestbuy.com/site/6618897.p)