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Kobalt KM2040X-06 Item 506586

7 source-linked failure reports. Most reported: Fire / ignition. Typical failure around 3.2 yr.

Reliability signal B · Early signal · data confidence Low

7 confirmed failure reports

Reliability summary

What is likely to go wrong, when it happens, and how expensive it can be — from source-linked failure reports. Counts are reports in our database, not a population failure rate.

Reliability signal

B

7 confirmed failure reports · Early signal · Data confidence: Low

Most common issue
Fire / ignition
Typical first failure
3.2 yr
Median of confirmed reports with timing
Median repair cost
—
Reported costs only · market varies
Highest reported repair
—
Not a quote · costs differ by country

What breaks?

Failure types

Click a type in the reports section below to filter.

  • Fire / ignition4 · 57.1%
  • Overheating2 · 28.6%
  • Battery failure1 · 14.3%

When does it break?

Failure timing

Months after purchase, using reports that included timing.

What does it cost?

Reported repair costs

Distribution of owner-reported repair costs— not a quote or guarantee. Labor and parts prices vary by country.

No reported repair costs yet for this model.

Median months to failure

38.5

Failure reports

7

View →

Median repair cost

—

Still recommend

—

% repaired

—

% mfr warranty

—

% extended warranty

—

% support helpful

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Use these reports as a risk signal, then check current listings before you buy.

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What breaks?

What breaks? · reports

Battery failure

Rotary Power Lawn Mowers (1448)

57 months

Government / agencyIndexed Oct 28, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20200906-42635-2147369983. Severity: Incident, No Injury. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: km2040x-06. Incident: Kobalt 40v cordless mower started smoking. At first thought it was the battery, but after letting it sit for a couple of hours and replacing battery, the mower is still smoking when in use. Checked online for any fixes and came across information on a recall for the mower.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

57 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Fire / ignition

Rotary Power Lawn Mowers (1448)

14 months

Government / agencyIndexed Oct 28, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20170620-71351-2147399551. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: KM2040X 25243. Incident: On 5/23/17 we had a fire at our house caused by a Kobalt Electric Lawn Mower. There were no flames per se but some heat and lots of acidic smoke/soot. The soot contaminated our entire house.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

14 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Fire / ignition

Rotary Power Lawn Mowers (1448)

13 months

Government / agencyIndexed Oct 28, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20170606-BDF84-2147399891. Severity: Incident, No Injury. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: Kobalt KM2040X-06. Incident: I had just started mowing my lawn with freshly charged batteries in a Kobalt KM2040X-06 mower when the mower sounded like one of the motors was winding down. This was quickly followed by smoke emanating from under the mower's deck. I let go of the dead man and lifted the mower onto its side and confirmed smoke was coming from the right motor. After the mower was powered off the smoke dissipated after about 30 seconds. The blade and motor felt bound up. The mower is now not operational and shuts off immediately after starting. The mower I have is not part of the existing recall notice from May 26 but I feel that a fire could have resulted had the mower not been promptly shut off. The serial # is KBV0320127 with a date of 02/01/16.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

13 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Overheating

Rotary Power Lawn Mowers (1448)

48 months

Government / agencyIndexed Oct 22, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20180610-2BFDF-2147387447. Severity: Incident, No Injury. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: KM2040X-06. Incident: While mowing my lawn, smoke started coming from both the right and left hand sides of the mower. I took out the batteries, let it cool for a long time, and tried to use it again but the smoking started up again.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

48 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Overheating

Power Lawn Mowers, Not Specified (1401)

29 months

Government / agencyIndexed Oct 22, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20181015-F3725-2147385006. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: KM2040X-06. Incident: I was mowing my lawn with a Kobal KM2040X-06 electric lawnmower. The mower was operating loudly for a bit, and then began to smoke. I shut the mower off and turned it over to find two spots within the unit from which smoke was emanating. I discontinued use of mower.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

29 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Fire / ignition

Rotary Power Lawn Mowers (1448)

Government / agencyIndexed Oct 22, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20190713-73A97-2147379915. Severity: Incident, No Injury. Matched catalog product: Kobalt KM2040X-06 Item 506586. Source model text: KM2040X-06. Incident: On 7/12/2019, at approximately 10:30 pm, my wife noticed that our back deck was on fire. In the process of putting out the fire, we discovered that our Kobalt 40v Lawn Mower was on fire and subsequently caught our back deck on fire. We stored the lawn mower just under the deck while not in use.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

Not stated

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

92%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

Fire / ignition

Rotary Power Lawn Mowers (1448)

99 months

Government / agencyIndexed Oct 16, 2026Source-linkedVerify source — SaferProducts.gov incident

SaferProducts.gov consumer incident report 20220602-3F093-2147355847. Severity: Incident, No Injury. Product: Kobalt KM2040X-06 Item 506586 (Kobalt 20 inch battery powered push mower Model KM2040X-06, Serial number KBSS3330373 with a manufacture date of 11/29/13.). Incident: I have a Kobalt 20 inch mower Model KM2040X-06 Serial number KBS3330373. Recently I was using the mower, it has two battery compartments, the mower shut off while I was using it. There are indicator lights next to the battery compartments and they both starting flashing just before the mower shut off. The mower also started smoking, fortunately it didn't catch fire. I remembered receiving a recall notice but I hadn't ever notified Sun Works. The issue I experienced is identical to the details in the recall notice. I contacted Sun Works today and I was told that my mower is outside of the recall dates. The production date on my mower is 11/29/13 and the person on the phone informed me that the recall start date is 2014. I am making you aware because based on what happened, it is the same product and the production date is just before the start of the mowers that were recalled. They didn't off any consideration to repair the issue other than provide information I can us to trouble shoot it myself.

UnverifiedEvidence ★★★★☆
View report details

Months until failure

99 months

Repair cost

Not stated

Repaired

Not stated

Manufacturer warranty

Not stated

Extended warranty

Not stated

Support helpful

Not stated

Would recommend

Not stated

AI extraction confidence

88%

Verification status

Unverified

Evidence quality

★★★★☆ (4/5)

Discussion

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