The AUDI A4 (2001-05) 5DR AVANT 2.5 TDI 163 SPORT MTRON AUTO is a premium mid-size estate, rather than a conventional hatchback. Its five-door Avant body offers practical luggage space and a restrained look. In the UK used-car market, it competes with estate versions of the BMW 3 Series and Mercedes-Benz C-Class. mycarcheck.com recorded 39 look-ups covering 21 distinct VINs, giving a modest snapshot of this particular version. Checks show average most-recent mileage of 156,000 miles and average annual mileage of 4,000, alongside around 6.5 previous keepers. The average private-sale valuation was £400; treat this as a historical data indicator, not a current asking-price guide. The 2.5-litre diesel and automatic transmission make it a relaxed choice for longer commutes and family trips, while Sport trim adds a more purposeful feel. It suits buyers wanting a comfortable, roomy older Audi estate, but check condition, service history and running costs carefully before purchase.