• Impressive WLTP fuel economy
• Low emissions across the range
• Generally very dependable

What are the running costs?

The lifespan of the Audi A4 Avant covers both the current WLTP fuel economy testing regime and the previous NEDC cycle. As a result, there’s a massive range in the bald MPG numbers, up to as much as 70mpg from the most frugal diesels (which are badged ‘ultra’). Our specs pages show the MPG for each model.

Of the engines currently available, the 35 TDI and 40 TDI diesel are the most economical, both returning around 49mpg according the official WLTP figures. Expect to see at least 45mpg in mixed, real-world driving.

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The 35 TFSI is the most efficient petrol engine, achieving around 42mpg. We reached 40mpg in the more powerful 40 TFSi and expect to hit 35mpg in the 45 TFSI. The petrol S4 should do 35mpg on motorways, while the diesel version should exceed 40mpg.

All those numbers compare pretty well with rival cars with equivalent engines.

Servicing and warranty

Audi’s servicing and maintenance costs are fairly expensive, but then it is a premium brand. You can spread the cost by taking out a multi-year, fixed-price service plan.

Audi’s standard warranty coverage of three years or 60,000 miles is less than generous compared with rivals. Especially BMW, which provides three years with unlimited mileage. But you can extend the Audi’s warranty to four years/75,000 miles or five years/90,000 miles at extra cost.

Reliability

• Audi’s overall reliability record is patchy
• Some technology has suffered niggles
• Generally liked by owners

Audi A4 Avant reliability has proven to be very strong. In 2023, Parkers’ sister title Fleet News’ annual FN50 company car reliability survey placed the A4 range third behind the BMW 3 Series and Tesla Model 3. You can read more in our rundown of the UK’s most reliable cars. That’s no surprise, though. Many of the A4’s structural, mechanical and electric components are used across a vast number of other Volkswagen Group cars. But we have experienced issues with the Virtual Cockpit display. Our owner reviews show most feel very positive about their experience with the A4 Avant.

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There have been a number of recalls affecting cars built up to 2022; the government’s vehicle recall check website provides the details. Rectification work should have been carried out on affected cars – check the service history and/or contact a dealer to find out if needed work has been carried out on any used A4 Avant you’re interested in buying. Outstanding recalls are also listed on a car’s MOT certificate.