Image available on the official notice.
Passenger cars (Mercedes-Benz Mercedes-AMG CLA45S 4MATIC+ and 3 other models) - Repair
Official notice
21 Aug 2025
Last checked
27 Oct 2026
An official CAA Japan notice concerns Passenger cars (Mercedes-Benz Mercedes-AMG CLA45S 4MATIC+ and 3 other models) - Repair. Engine (engine control unit) defect. ■ Defective component: Engine (engine control unit). ■ Condition of the structure, equipment or performance deemed noncompliant with standards and its cause: Due to an inappropriate control program in the engine control unit, the engine control program may not sufficiently accommodate manufacturing variations in the nozzle section of the turbocharger turbine housing. Consequently, exhaust gas flow velocity varies depending on load and engine speed, changing the efficiency with which it acts on the turbine and altering output characteristics. In the worst case, exhaust emissions may exceed regulatory limits. Published 2025-08-21.
What to do now
Recall notification number: 外-4056. ■ Corrective measures: On all vehicles, rewrite the engine control unit control program with a corrected control program.
Units affected
2,615
Recall number
外-4056
Official notice
2025-08-21
The hazard
The hazard
Engine (engine control unit) defect. ■ Defective component: Engine (engine control unit). ■ Condition of the structure, equipment or performance deemed noncompliant with standards and its cause: Due to an inappropriate control program in the engine control unit, the engine control program may not sufficiently accommodate manufacturing variations in the nozzle section of the turbocharger turbine housing. Consequently, exhaust gas flow velocity varies depending on load and engine speed, changing the efficiency with which it acts on the turbine and altering output characteristics. In the worst case, exhaust emissions may exceed regulatory limits.
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.
Models
Recall Numbers
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Turn on automatic VIN checksAffected products
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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