The AUDI A4 (2001-05) 4DR SALOON 2.5 TDI 180 QUATTRO SPORT TIP AUTO is a premium four-door diesel saloon, aimed at buyers wanting comfort and all-weather grip rather than a city car. In the UK used market, it sits among family and business cars, rivaling the BMW 3 Series and Mercedes-Benz C-Class. Mycarcheck.com records 78 look-ups covering 20 distinct cars, offering a useful snapshot rather than a full reliability verdict. Checked examples averaged 152,000 miles and around 7,000 miles a year; the average private-sale valuation was £400. The recorded keeper average was about eight, suggesting ownership histories deserve close attention when viewing. The strong diesel engine and automatic gearbox suit motorway commuting and long-distance travel, while quattro four-wheel drive can add confidence in poor weather. Sport trim gives it a purposeful feel, though age and mileage make condition, service records and repair costs important checks. It best suits experienced drivers seeking a capable, comfortable used Audi.