Image available on the official notice.
Passenger cars (Mercedes-Benz S500 4MATIC and 5 other models) - Repair
Official notice
15 May 2025
Last checked
27 Oct 2026
An official CAA Japan notice concerns Passenger cars (Mercedes-Benz S500 4MATIC and 5 other models) - Repair. Defect in the braking system (brake hoses). ■ Defective part (component name): Braking system (brake hoses). ■ Structure, equipment or performance deemed noncompliant with standards, and its cause: Due to an inappropriate manufacturing process, some front-wheel brake hoses have low durability in hot and humid environments. In addition, due to insufficient design evaluation, some brake hoses have sections with low flexibility. As a result, prolonged exposure to hot and humid environments may cause the hoses to deteriorate and crack, allowing brake fluid to leak and reducing braking force. Published 2025-05-15.
What to do now
(Recall notification number) 外-3990 ■ Corrective measures: Replace the front-wheel brake hoses with improved parts on all vehicles.
Units affected
7,719
Recall number
外-3990
Official notice
2025-05-15
The hazard
The hazard
Defect in the braking system (brake hoses). ■ Defective part (component name): Braking system (brake hoses). ■ Structure, equipment or performance deemed noncompliant with standards, and its cause: Due to an inappropriate manufacturing process, some front-wheel brake hoses have low durability in hot and humid environments. In addition, due to insufficient design evaluation, some brake hoses have sections with low flexibility. As a result, prolonged exposure to hot and humid environments may cause the hoses to deteriorate and crack, allowing brake fluid to leak and reducing braking force.
How to check if you're affected
How to check if you're affected
Compare the product name and identifiers below with the item you own. Check the official notice for the affected products and next steps.
Recall Numbers
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Affected products
Product 1
Units affected
Hazard
Where it was sold
Where it was sold
Retailer information is not currently available in RecallScope. Check the official notice for distribution details.
Location 1
Affected area 1
Company & contacts
Company & contacts
Brand: Mercedes-Benz. Contact: メルセデス・ベンツ日本合同会社. Phone 0120-086-880.
Source & status
Source & status
Recall details
Recall details
Recall number
Event id
Units affected
Source tier
Documents, notices & source
See the official notice and source documents for full details.
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