The AUDI A4 (2001-05) 5DR AVANT 1.9 TDI 130 QUATTRO SE is a compact executive estate: a practical five-door alternative to a saloon, with useful luggage space and a more upmarket feel than mainstream family cars. In the UK used market, it suits buyers wanting an older, capable all-rounder today. Mycarcheck.com records 201 look-ups covering 99 distinct VINs, giving a snapshot of cars checked. These show an average recorded mileage of 168,000 and about 7,000 miles driven annually; the average is nearly five previous keepers. The average private-sale valuation is £400, a guide from the data, not a guaranteed price. The 130bhp diesel and quattro four-wheel drive make this A4 estate appealing for motorway commuting, family trips and carrying bulky kit, with extra confidence in poor weather. It feels more premium than many mainstream estates, though age, mileage and upkeep matter; compare condition with BMW 3 Series Touring and Volvo V70 before buying.