MAN Truck & Bus is continuing its service and inspection measures for vehicles equipped with D26 Euro-6c engines (built between November 2016 and August 2019) and will widen these measures from mid-November, the company said in a recent press release. According to MAN, around 90% of previous actions have been completed and the measures have proven “effective in preventing engine damage”.
Affected engines include the D2676LF51–53 and D2676LOH35–37 types, installed in MAN trucks and buses of this generation.
Oil change intervals reduced across the board
A key change applies to all vehicles with this engine generation: MAN is reducing the recommended oil change intervals by 25%. According to the company, the adjustment is intended to “further increase operational robustness as mileage increases”.
MAN explains that aged or contaminated engine oil can promote damage to oil filter components and main engine bearings, potentially leading to engine damage and, in rare cases, fires.
Up to 25% of the fleet: preventive bearing replacement
MAN also plans preventive replacement of the lower main engine bearings – but only for vehicles considered to be at increased risk. These include:
- Vehicles for which bearing replacement was previously recommended but declined by the owner
- Vehicles whose usage profile or maintenance history indicates higher stress
- Vehicles where “extensive field observations” point to a rising risk of failure
MAN estimates that up to 25% of the affected Euro-6c engines may require this measure. Owners will be notified individually from mid-November.
The company stresses that internal analyses show the high effectiveness of this action. Around 10,000 trucks have already received new main bearings through previous campaigns.
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Fire risk remains low but not zero, MAN says
MAN notes that vehicle fires can have “a variety of causes”, including overheated brakes, tuning modifications or electrical faults. Across Europe, around 880,000 MAN vehicles are in operation, of which 120,000 trucks and over 5,000 buses have the affected Euro-6c engines produced between 2016 and 2019.
For these engines, MAN has documented 263 fire incidents worldwide over nine years, corresponding to 0.2% of the vehicles. In most cases, “maintenance intervals were significantly exceeded or previous repairs were not carried out according to manufacturer specifications”, the company says.
Recurring fires already put MAN under scrutiny in 2024/2025
The new measures come against the backdrop of a long-running issue. In 2024, the KBA classified an earlier recall as posing a “serious risk”. The recall concerned engine damage in the D26 Euro-6c series, which could lead to fires under certain maintenance conditions.
According to research by NDR, 33 trucks caught fire on the A7 motorway section between Göttingen and the Kirchheim triangle between January 2023 and August 2025 – including 27 MAN vehicles.
At the time, haulage operators reported economic losses, drivers described dangerous situations, and emergency services were faced with hazardous operations.
