A piston assembly configured to be arranged in a cylinder with an inner cylinder wall, comprising: a piston configured to be reciprocatingly arranged within the cylinder; a connecting rod; a first circlip; a second circlip; and a piston pin assembly including a piston pin for connecting the connecting rod and the piston, the piston pin having a first end and a second end opposing the first end, a first emergency guiding element being attached to the first end of the piston pin, the first emergency guiding element being integrally formed with a first emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, and a second emergency guiding element being attached to the second end of the piston pin, the second emergency guiding element being integrally formed with a second emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, the first emergency guiding element and the second emergency guiding element including a bore extending from the emergency guiding outer wall through the guiding element (30, 31) and a circlip recess section configured to provide an accommodation space for the first circlip and the second circlip for axially fixing the piston pin in the piston. a piston configured to be reciprocatingly arranged within the cylinder; a connecting rod; a first circlip; a second circlip; and a piston pin assembly including a piston pin for connecting the connecting rod and the piston, the piston pin having a first end and a second end opposing the first end, a first emergency guiding element being attached to the first end of the piston pin, the first emergency guiding element being integrally formed with a first emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, and a second emergency guiding element being attached to the second end of the piston pin, the second emergency guiding element being integrally formed with a second emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, the first emergency guiding element and the second emergency guiding element including a bore extending from the emergency guiding outer wall through the guiding element (30, 31) and a circlip recess section configured to provide an accommodation space for the first circlip and the second circlip for axially fixing the piston pin in the piston. a piston pin for connecting the connecting rod and the piston, the piston pin having a first end and a second end opposing the first end, a first emergency guiding element being attached to the first end of the piston pin, the first emergency guiding element being integrally formed with a first emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, and a second emergency guiding element being attached to the second end of the piston pin, the second emergency guiding element being integrally formed with a second emergency guiding outer wall for facing the inner cylinder wall and for contacting the inner cylinder wall only in case of a demolition of the piston, the first emergency guiding element and the second emergency guiding element including a bore extending from the emergency guiding outer wall through the guiding element (30, 31) and a circlip recess section configured to provide an accommodation space for the first circlip and the second circlip for axially fixing the piston pin in the piston.