Recalls › Japan › Komatsu WDR-WA121; YDR-WA135; WDR-WA122; YDR-WA136

Komatsu WDR-WA121; YDR-WA135; WDR-WA122; YDR-WA136 — recall

Name: Komatsu WDR-WA121; YDR-WA135; WDR-WA122; YDR-WA136
Brand: Komatsu

Automotive · Japan · 2026-10-09

Origin: 日本

Komatsu rainwater ingress may cause unexpected activation

Country	Japan
Category	Automotive
Published	2026-10-09
Country of origin	日本
Manufacturer	Komatsu
Models affected	WDR-WA121; YDR-WA135; WDR-WA122; YDR-WA136
Model year	WA320-7; WA320-8; WA270-7; WA270-8
Units affected	2404
Defect	In the parking brake of shovel loaders, due to insufficient measures against the ingress of rainwater into the parking brake valve, rainwater may enter through the gap in the solenoid lead wire insertion part. Therefore, if use is continued, rust may form inside the solenoid, reducing the force that holds the parking brake in the released state, and in the worst case, the parking brake may activate while driving.
Recall type	Vehicle
Remedy	For all vehicles: (1) Replace the solenoid with an improved part. (2) Change the mounting direction of the solenoid lead wire insertion part. (3) Install a cover around the solenoid. In addition, apply sealant to connectors where silicone adhesive sealant has not been applied.
Recall number	58800
Official notice	View source ↗

What this means for sellers

Likely platform / channel actions	OEMs/dealers will run the remedy (repair, replace or refund); component suppliers in the chain may face traceback.
Self-check for comparable products	Check your comparable products' design, materials and QC records against the defect described here.
Rules & standards likely involved	the destination market's product-safety rules and mandatory standards

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