Xiaomi’s Robot Vacuum S40 Pro is a real product, but it is no longer a brand-new launch: the model was announced on November 26, 2025. Its unusual feature is a mechanically extending mop assembly designed to clean close to walls, alongside Xiaomi’s claimed 15,000 Pa suction. Those headline figures are genuine Xiaomi specifications, not independent whole-home performance results. The S40 Pro also uses a basic charging dock rather than a station that empties dust, washes mop pads, dries them, or refills water.
That makes it most interesting for buyers with mainly hard floors who want stronger edge mopping and accept regular manual maintenance.
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What makes the Xiaomi S40 Pro different?
Most round robot vacuums leave a narrow strip beside walls because their circular body and fixed mop arrangement cannot reach fully into the perimeter. The S40 Pro addresses that problem with two rotating mop pads whose assembly can move outward when the robot cleans along walls or around obstacles.
Xiaomi says the mop can approach an edge to within 1 mm in its internal laboratory testing. The robot itself does not move sideways; the mop-pad mechanism extends outward. Its mop tray also includes an anti-collision design intended to protect furniture edges.
#1 Best Overall
- 【Perfect Compatibility】These accessories for Xiaomi S40 PRO / OV71GL Vacuum Cleaner, Please Check Your Machine Model before purchasing Packge，Replacement Parts Include 2 Main Brush,6 Side Brush,6 Hepa Filters, 6 Mop Clothes and 2 Cleaning Tool.
- 【Efficient Cleaning】Side brush improves the efficiency of dust removal, and the soft material can take care of corners, close to walls and crevices to ensure a completely clean area. High-efficiency particulate arrestance filter eliminates 99.97% of particles as small as 0.3 microns, intercept dust and does not release it back into the air.
- 【Main Brush Deep Cleaning】The design of main brush which is not easy to miss dust, and the silicone material design makes it easier to clean the gaps deeply. The mop has super strong water locking ability, which can easily clean oil stains.
- 【Soft velvet fiber cloth】Soft velvet fiber, upgraded deep cleaning material, higher moisture content of mop, suitable for hard floors with more stains and difficult to clean.
- 【Product Advantages】The use of great quality materials and design increases the service life of the product, effectively avoiding aging problems and damage caused by simple collisions, and effectively reducing noise and prevent hair tangling on the machine.
The side brush extends separately toward corners. Xiaomi claims a zero-millimetre corner distance and up to 100% corner coverage in internal testing. These figures describe controlled tests, not a guarantee that every baseboard, grout line, inside corner, or irregular stone edge will be cleaned perfectly.
In a home, performance can still be affected by deep baseboards, uneven flooring, furniture legs, tight corners, and situations where the mop has to retract to avoid a collision.
See Xiaomi’s official product description and test claims.
What does “15,000 Pa suction” actually mean?
Xiaomi says the S40 Pro’s suction fan blower reached up to 15,000 Pa at the robot’s inlet. The company measured it with a vacuum gauge rated from 0 to 35 kPa, with 0.01 kPa precision, while the fully charged robot was operating under its stated test conditions.
That is a pressure measurement, not a standardized score for cleaning carpets, collecting pet hair, or removing embedded debris. Suction pressure alone does not establish how well a robot cleans. Brush design, airflow, seals, floor type, navigation, repeated passes, and the robot’s ability to maintain contact with a surface all matter.
Xiaomi separately claims a 99% collection rate for large particles on hard floors in standard vacuuming mode. That is also an internal-laboratory result rather than an independently verified household test.
The sensible interpretation is that 15,000 Pa is a notable specification, but it should not be treated as proof that the S40 Pro will outperform every robot with a lower advertised number.
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Xiaomi Robot Vacuum S40 Pro specifications
| Specification | Xiaomi-published figure |
|---|---|
| Model | OV71GL |
| Robot dimensions | 355 × 350 × 99 mm |
| Weight | 4.2 kg |
| Rated power | 160 W |
| Battery | 4,800 mAh rated; 5,200 mAh nominal/typical depending on regional wording |
| Dustbin | 430 mL |
| Water tank | 310 mL |
| Mop rotation | 180 ± 10 rpm |
| Mop lift | Up to 10 mm |
| Claimed coverage | Up to 180 m² under Xiaomi’s specified test conditions |
| Navigation | LDS laser navigation with 360-degree scanning |
| Obstacle sensing | 129-degree wide-angle structured-light system |
| Charging dock | 146 × 122 × 98.5 mm |
Xiaomi’s regional specification page lists the model, dimensions, battery and weight.
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- 🔔【Perfect Compatibility】 Precisely compatible with Xiaomi Robot Vacuum S40 Pro (OV71GL)，all accessories fit the vacuum’s original installation position without trimming or adjustment—direct replacement for seamless home cleaning use, no mismatch issues.
- 🔔【High-Quality Durable Materials】 Crafted with premium ABS plastic, high-density nylon bristles and washable HEPA filter material; main brush resists bending and wear, side brushes maintain strong rotation, all parts stand up to daily long-term use for extended service life.
- 🔔【Enhanced Cleaning Performance】 Stiff-soft mixed main brush deeply agitates floor dust and debris, dual side brushes sweep edge dirt into the vacuum’s suction range, upgraded HEPA filters capture fine dust/pet dander—restores your S40 Pro’s original cleaning power in one kit.
- 🔔【All-In-One Replacement Kit】 Comes with all essential spare parts for regular maintenance, eliminates the trouble of purchasing single accessories separately; ideal for monthly/quarterly vacuum upkeep, keeps your cleaning robot in top working condition.
- 🔔【Easy Install & Reusable Design】 No extra tools required for installation—follow the original vacuum’s disassembly steps to replace parts in minutes; washable HEPA filters and mop pads can be cleaned and reused multiple times, saving your replacement cost over time.
Rotating mops, carpet handling and edge cleaning
The S40 Pro uses two rotating mop pads rather than a single passive cloth dragged behind the robot. Xiaomi specifies rotation of approximately 180 rpm. Rotating pads can provide more mechanical agitation for routine marks, although the available evidence does not independently establish stain-removal performance.
The pads can lift by up to 10 mm when the robot detects carpet. Xiaomi recommends using carpet bypass for carpets with pile higher than 5 mm or where additional moisture protection is needed. The Xiaomi Home app provides four carpet-related choices:
- Clean carpet first
- Carpet avoidance
- Carpet crossing
- Ignore carpets
Xiaomi also describes an automatic carpet-boost option. Its published path is Device homepage → Map Edit → Carpet Edit → select the carpet area → Carpet Preferences → Carpet Boost. Menu names can vary with the app version and region.
A 10 mm lift may not prevent moisture transfer on every rug. Thick or shag carpets, lightweight bathroom mats and loose rugs can still be difficult. Buyers with many carpets should prioritize reliable carpet detection and mop management over the suction headline.
Navigation and obstacle avoidance
The S40 Pro combines LDS laser navigation with 360-degree scanning, structured-light obstacle detection and automatic route planning. Xiaomi says the structured-light system has a 129-degree field of view and is designed to detect low objects, including in low-light conditions.
The Xiaomi Home app supports multi-storey map memory, room or region cleaning, scheduling, restricted areas, no-go zones, map editing and resume cleaning. Xiaomi also says the app can recommend restricted areas after repeated getting-stuck events and can target areas near selected furniture or locations.
These features do not mean the robot will identify every cable, sock, toy or pet accident reliably. Object recognition and recovery behaviour depend on the object, lighting, room layout and firmware. The available information does not provide independent testing of obstacle avoidance.
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Xiaomi describes a Y-shaped main roller brush and an anti-tangle side brush. The company says the design is intended to block, detangle, gather and vacuum hair, while the roller’s end caps are designed to reduce hair collecting around the brush ends.
Rank #3
- INCREDIBLE SUCTION: Powerful Shark suction picks up dirt and debris on all floor types—tackling even the toughest of messes in your home.
- NO SPOTS MISSED: With Matrix Clean Navigation, the vacuum cleans in a precise matrix grid taking multiple passes over dirt and debris for whole home, deep cleaning coverage.
- IT EMPTIES ITSELF: The bagless, self-emptying base holds up to 30 days of dirt and debris while its true HEPA filtration captures and traps 99.97%* of dust and allergens (*down to .3 microns).
- PRECISION HOME MAPPING: 360° LiDAR vision quickly and accurately maps your home so your robot can methodically clean detecting and avoiding objects in its path, day or night, adapting to everyday changes in the home.
- PERFECT FOR HOMES WITH PETS: With powerful vacuum suction, Shark’s self-cleaning brushroll, and HEPA filtration system the robot captures pet hair, dust, dander and allergens with ease.
That may reduce maintenance, but it does not make the vacuum maintenance-free. Long hair, pet hair, thread and debris can still accumulate around brush ends, wheels, mop holders and sensors. Pet owners should inspect the robot after its first few cleaning cycles rather than assuming the anti-tangle system eliminates cleaning.
The biggest limitation: this is not a self-cleaning dock
The included dock is a charging base. Xiaomi’s published package contents list the robot, charging dock, power adapter, side brush, main brush and cover, dust compartment, water tank, two mop-pad holders, two mop pads, manuals and warranty material.
The official specification pages do not list automatic dust collection, mop washing, mop drying or automatic clean-water refilling. The owner must therefore:
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minute- Empty the 430 mL dustbin.
- Refill the 310 mL water tank.
- Remove and wash the mop pads.
- Inspect the main brush, side brush, wheels and mop holders.
- Clean sensors when navigation becomes unreliable.
This distinction matters because multifunction docks are common on more expensive robot vacuums. The S40 Pro may be easier to place and less complicated than a large dock, but it offers much less automation.
Check Xiaomi’s listed contents and regional specifications.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How much area can it clean?
Xiaomi claims up to 180 m² on one charge and water fill. The stated test uses an open environment, routine-maintenance mode, quiet suction, level-one water flow, a full tank and vacuum-and-mop operation.
That is not a universal coverage guarantee. Actual area will vary with suction power, number of passes, floor type, furniture density, thresholds, obstacles, water flow, battery condition and the number of times the robot returns to its dock.
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The 310 mL water tank and 430 mL dustbin may be sufficient for routine cleaning in many homes, but a large or heavily soiled hard-floor area may require intervention before the robot finishes.
Rank #4
- 𝗔𝗹𝗹-𝗶𝗻-𝗢𝗻𝗲 𝗗𝗼𝗰𝗸 𝗳𝗼𝗿 𝗛𝗮𝗻𝗱𝘀-𝗙𝗿𝗲𝗲 𝗖𝗹𝗲𝗮𝗻𝗶𝗻𝗴 - The upgraded dock automatically empties dust into a sealed 2.7L bag that lasts 7–9 weeks, while 167℉ high-temperature self-cleaning helps refresh the mops after each use and 113℉ warm air drying keeps them ready for the next clean, making everyday floor care effortless for busy and pet-friendly homes
- 𝟭𝟴,𝟱𝟬𝟬 𝗣𝗮 𝗣𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝗦𝘂𝗰𝘁𝗶𝗼𝗻 - Engineered for strong everyday cleaning performance, the robot delivers powerful suction to effortlessly lift dust, crumbs, cat litter, stubborn debris, and pet hair from hard floors, carpets, and corners, helping keep every room fresh and spotless with less effort
- 𝗔𝗻𝘁𝗶-𝗧𝗮𝗻𝗴𝗹𝗲 𝗦𝘆𝘀𝘁𝗲𝗺 𝗳𝗼𝗿 𝗣𝗲𝘁 𝗛𝗼𝗺𝗲𝘀 - Built for homes with pets and long hair, the zero-tangle side brush, all rubber main brush, and easy-to-clean omnidirectional wheel help reduce hair wrap and simplify maintenance, making daily cleanup easier and less time-consuming
- 𝗦𝗺𝗮𝗿𝘁 𝗠𝗼𝗽𝗽𝗶𝗻𝗴 𝗳𝗼𝗿 𝗗𝗮𝗶𝗹𝘆 𝗦𝘁𝗮𝗶𝗻𝘀 - From kitchen splashes and cereal crumbs to pet paw prints and everyday footprints, the advanced dual mop system tackles daily messes with ease while adjusting water flow for cleaner, fresher floors throughout your home
- 𝗢𝗯𝘀𝘁𝗮𝗰𝗹𝗲 𝗔𝘃𝗼𝗶𝗱𝗮𝗻𝗰𝗲 & 𝟯.𝟴 𝗶𝗻 𝗟𝗼𝘄-𝗣𝗿𝗼𝗳𝗶𝗹𝗲 𝗖𝗹𝗲𝗮𝗻𝗶𝗻𝗴 - Powered by smart obstacle detection, the robot precisely avoids shoes, toys, and furniture legs while gliding smoothly under beds and sofas to clean hidden dust in low-clearance spaces for more complete coverage
Who should consider the S40 Pro?
It is a reasonable fit for:
- Homes with mostly hard flooring.
- Rooms where dust and crumbs collect along walls.
- Buyers who want rotating mops rather than a passive cloth.
- People comfortable emptying a bin and washing mop pads manually.
- Existing Xiaomi Home users who want ecosystem integration.
- Homes where a 99 mm robot can fit beneath relevant furniture.
It is a weaker fit for:
- Homes dominated by thick, shaggy or high-pile carpets.
- Buyers who want automatic emptying, washing, drying and water refilling.
- People seeking independently verified premium cleaning results.
- Buyers who cannot confirm local Xiaomi distribution and warranty support.
- Anyone choosing primarily because 15,000 Pa sounds higher than a rival’s specification.
Availability and buying considerations
Xiaomi has official regional listings for the S40 Pro, including pages for the UK, Spain and other markets. Those pages do not establish current US retail availability, US warranty coverage or US plug compatibility. Price and stock also vary by country.
Before buying, confirm the country-specific Xiaomi Store listing, delivered price, warranty terms, replacement mop-pad and brush availability, plug type and Xiaomi Home app-region compatibility. The available official pages do not provide a reliable universal current price.
Potential alternatives fall into three broad groups: multifunction-dock robots such as relevant Roborock Qrevo, Dreame L10s or X-series, and Eufy X10 Pro Omni models; lower-cost robots with rotating mops but no edge-extension mechanism; and premium edge-cleaning models. A fair comparison should examine independently tested edge coverage, carpet behaviour, obstacle avoidance and maintenance—not advertised Pa figures alone.
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Xiaomi’s official material establishes the robot’s advertised hardware, capacities, app features and laboratory measurements. It does not independently confirm:
- Real-world 1 mm edge performance.
- 99% large-particle pickup in typical homes.
- 180 m² coverage across different layouts and settings.
- Deep-carpet pickup, stain removal or long-term hair handling.
- Durability of the extending mop mechanism.
- Reliable recognition of every small obstacle.
- Long-term firmware and app reliability.
Some online user reports describe a mop lifting or stopping and other firmware or remapping concerns, but these are anecdotal reports rather than verified product-wide defects. They should not be treated as established evidence without controlled testing.
Verdict
The Xiaomi Robot Vacuum S40 Pro is best understood as a feature-rich, manually maintained robot vacuum whose distinctive selling point is mechanical edge-focused mop and side-brush extension. The 15,000 Pa suction claim is worth noting, but it is an inlet pressure figure and not an independent cleaning score.
At an aggressive local price, the extending mop, rotating pads, laser mapping and compact charging dock could make the S40 Pro compelling for hard-floor homes. If it costs close to a rival with an automated dust-and-mop station, the manual dock becomes a major disadvantage. Check regional support and consumables before buying, and treat Xiaomi’s headline measurements as claims to interpret—not guarantees of household performance.
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