Opting for a used Audi engine may be a very good choice for several reasons. It saves cost, as the used engines are considerably cheaper than the new ones, which allows one to free up the budget for other repairs or upgrades. Another advantage is the availability. Older or less common Audi models might have discontinued new engine production, making used engines the only option. One finds that salvaged vehicles provide great sources for engines. Hence, the reuse of already existent resources offers a sustainable option. Salvage yards or most suppliers offer warrants on the usage of an older engine, meaning some level of comfort. If you have no issues being a bit on the risk-taking side, and time is less of a matter, then purchasing a used Audi engine is worth it. Carefully research the reputation of the seller, the mileage on the engine, and the availability of any maintenance records prior to purchase. A professional mechanic's thorough inspection is always a good idea.