My 1996 five cyl. A6 (87.000 miles), lately uses to blow suddenly the engine, not often, but no matter cold or hot, highway or town. I cant refer it to any typical trouble or fail.
Service toldsme than everythink seems tobe OK.
Can someone help.. or experienced similar afraiding trouble?.

I know English is not your native language, but I don't understand the question.

Can you have someone help you translate to English?

I don't understand, "...lately uses to blow suddenly the engine..."

What do you mean?

Do you mean back fire if you do check your o2 sensors one may be bad.;)