Is it worth repairing a robot vacuum, or should you buy a new one?

Fix it or replace it? How I make the call

Sooner or later, every robot vacuum throws an error that a quick wipe doesn't fix. The wheels grind, the battery fades, the brush motor stalls or the LiDAR stops spinning.

At that point, most people ask the same thing: is it worth repairing, or should I just buy a new one? Robot prices have dropped so much that replacement can feel like the easy answer.

My view is that most robot problems in the first few years are cheap fixes, and a surprising number are DIY jobs. But there is a point where repair stops making sense, and it is not always about money.

In this guide, I walk through the most common failures, which ones are worth fixing, how warranty and software support change the math, and the simple rule I use to decide.

Robots like the Q10 S5+ are built around replaceable modules, so many common failures are part swaps rather than a reason to replace the whole robot. Read my Roborock Q10 S5+ review →

The most common failures and what they cost to fix

These are the failures I see most often, roughly in order of how common they are, with how I usually handle each one.

The top five rows cover most of what I see in practice, and all of them are usually worth fixing. Repair guides such as iFixit's Roborock Q5 battery guide show how approachable many of these jobs are with a single screwdriver.

Brush and wheel problems on robots like the Roomba 105 Combo are usually fixed with a cleaning or a replacement part. Read my iRobot Roomba 105 Combo review →

Check the warranty before anything else

Before you buy any part or pick up a screwdriver, check whether the robot is still under warranty. That one step can change the whole decision.

Roborock's limited warranty covers new products for one year from purchase against defects in materials and workmanship, and its US terms exclude consumable items such as filters and brushes. Roborock also sells extended warranty coverage at checkout on eligible products. Some brands go further; Dreame lists a 3-year warranty on its L40 Ultra Gen 2 product page.

The fine print matters. Roborock's terms exclude damage from improper or unauthorized repair and from parts not supplied by Roborock. Opening the robot and installing a third-party part while it is under warranty can cost you that coverage.

Out of warranty, the calculation becomes simpler: what does the fix cost compared with a robot you would actually want to buy instead?

Dreame lists a 3-year warranty on the L40 Ultra Gen 2, which is worth checking before paying for any repair. Read my Dreame L40 Ultra Gen 2 review →

The rule I use to decide

Out of warranty, I use a simple rule of thumb. It is not an industry standard, just the framework that has served me well.

"Comparable new robot" matters. If your five-year-old robot cost $600, compare the repair with what a robot of similar ability costs today, which is often much less than you paid. That can tip a borderline repair toward replacement.

A mid-range robot like the Qrevo S Pro is a good benchmark for "comparable new robot" when you price out a repair. Read my Roborock Qrevo S Pro review →

When to replace even if repair is cheap

Money is not the only factor. These are the situations where I replace even when a repair is technically cheap.

The first is software. A robot that no longer gets firmware updates, or whose app is being shut down, has a limited future no matter how good its hardware is. Neato owners saw this when cloud services were phased out years earlier than promised, as Engadget reported.

The second is parts availability. If the part you need is only available from unknown sellers with no returns, the repair becomes a gamble.

The third is when your needs have changed. If you now have a dog, more rugs or a second floor, a repair that keeps an old robot limping along may not serve you as well as a robot that fits your home today.

Newer robots like the Qrevo Edge 3 Pro can make replacement the better choice when an older robot no longer gets updates. Read my Roborock Qrevo Edge 3 Pro review →

The e-waste angle

There is also a bigger-picture reason to repair when it makes sense. Electronics are one of the fastest-growing waste streams in the world.

The United Nations' Global E-waste Monitor 2024 found that a record 62 million tonnes of e-waste were generated in 2022, and only 22.3% was documented as properly collected and recycled. For the category of small devices, which the report says includes vacuum cleaners, the documented recycling rate was just 12%.

A robot vacuum that gets a new battery and brushes instead of going in the trash is a small but real win. And when a robot truly is done, taking it to a proper electronics or battery recycler, rather than the curbside bin, keeps its lithium-ion battery and metals out of a landfill.

Even budget robots like the ILIFE V2 are worth a battery or brush replacement before they become e-waste. Read my ILIFE V2 review →

DIY, manufacturer service or a repair shop?

If you decide to repair, you have three main routes. Each has a place.

For DIY, I start with the manufacturer's own support articles. iRobot's brush care guide, for example, walks through removing brushes and clearing end caps and bearings, which solves a large share of "brush error" calls before any part is needed.

Before ordering a part, I always confirm the exact model number from the sticker under the robot. Many robots look nearly identical across generations but use different batteries, brushes and wheel modules.

Photograph before you open: Take a photo of each step as you take the robot apart. It makes reassembly far easier and helps support if you need to call them later.

Mid-range robots like the D20 Air Plus are worth repairing through the brand's service channel when a major part fails under warranty. Read my Dreame D20 Air Plus review →