make sure its a later 2004 model (54 reg), they made a few changes and was actually quicker than the same Ep3 model from before. other than that having owned one from new for 5 years from 2004 check the back of the engine (would need to be done from under the car) and make sure there is no oil running down, can be as simple as incorrectly fitted oil filter or more serious and costly some of the seals going. this is the only problem i know of. other than that they are generally bullet proof in 5 years i didnt have one single problem. service history, and be sure to cane it to they redline to make sure engine is sound, they are high revving and need to be driven high up the rev range to get the best out of the engine. still nothing compared to a scooby though