Audi A5 Sportback used: the F5 engine and year to buy

The Audi A5 Sportback used market is one of the most tempting in the premium five-door class, because the four-door coupe looks of the F5 generation (2016 to 2024, with a 2019 facelift) now sit on £15,000 to £30,000 price tags. The smart buy is a post-2019 40 TFSI or 40 TDI quattro with a clean service file; the one to walk past is a high-mile early 45 TFSI with a mystery oil top-up history. Here is the engine-by-engine, year-by-year case.

Which engine to buy: 35 TFSI, 40 TFSI, 40 TDI, 45 TFSI quattro and the S5

The F5 line-up is broad, and the badge maths matters. The 35 TFSI (a 150PS 1.4, later a 150PS 2.0 mild hybrid) is the entry petrol: fine in town, breathless fully loaded. The 40 TFSI (190 to 204PS 2.0) is the sweet spot for most buyers, with enough shove and front-wheel-drive frugality. Step up and the 45 TFSI quattro (245 to 265PS) is the quick all-paw petrol, while the 40 TDI quattro (190 to 204PS) is the genuine cross-country tool that returns 45mpg-plus on a run. At the top, the S5 Sportback runs a Porsche co-developed 3.0 TFSI V6 making 354PS through quattro and an eight-speed Tiptronic, not the S tronic dual-clutch used lower down. Our pick for value and durability is the 40 TDI quattro from 2019 on; for petrol buyers who want quattro security, the 45 TFSI is the one, provided the oil history is spotless.

Engine faults to budget for before you commit

Audi’s EA888 Gen 3 2.0 TFSI (the 40 and 45 petrols) largely cured the chronic oil-burning that plagued the older Gen 2 unit, but it is not bulletproof. Owners on the a5oc.com forum still report cold-start chain rattle on neglected cars and coolant seepage from the plastic pump housing, plus the occasional PCV valve causing rough idle and raised oil use. Treat any car that needs frequent top-ups, or has a vague service file, as a £1,000-plus engine risk; independent workshop and warranty-claim data put the average A5 engine repair north of that figure. The 2.0 TDI diesels (35 and 40 TDI) are tougher long term but want their EGR, DPF and AdBlue system exercised on long runs, not short urban hops. If you are weighing the petrol-versus-diesel cost case more widely, our look at Audi Q7 4M common faults at 60 to 80k miles shows the same EA888 and TDI ageing patterns on a bigger Audi.

Gearbox and S tronic service: where the big bills hide

Most F5 cars use Audi’s seven-speed S tronic dual-clutch, and it is the single component that turns a cheap A5 into an expensive one. The clutch packs and mechatronic unit are wear items; a jerky low-speed shift, hesitation pulling away, or a juddery reverse all point to a transmission that has missed its fluid service. Audi specifies an S tronic oil-and-filter change around every 38,000 miles, and skipping it is the fastest route to a four-figure repair (independent workshop and warranty-claim data flag gearbox faults as the priciest A5 issue, around the £3,000 mark). On a test drive, insist on a cold first pull-away and a slow car-park manoeuvre. The S5’s Tiptronic torque-converter auto is generally the more durable choice if you can stretch to it. The same dual-clutch caution applies across the range, as we flag in our Audi A7 C8 used buyer’s guide.

Virtual Cockpit and MMI niggles to check on the test drive

The cabin is the A5’s strongest card and its most common complaint. Owners rate the build, but the MMI infotainment and Virtual Cockpit digital dash draw the bulk of the grumbles in survey data: phones failing to pair, screens flickering or freezing, and the occasional full reset needed. Pre-facelift cars (2016 to 2019) used the rotary MMI controller; the 2019 facelift moved to a 10.1-inch touchscreen that looks slicker but attracts its own laggy-response gripes. On a viewing, pair your own phone, cycle through Apple CarPlay or Android Auto, work every camera and sensor, and listen for dashboard and parcel-shelf rattles at low speed. None of this is a dealbreaker, but it is a useful bargaining point on price, and a car with a freshly updated MMI software version is worth more than one stuck on an old build.

Audi A5 Sportback used reliability year by year

The F5 splits neatly at the 2019 facelift. Pre-facelift cars (2016 to 2019) are now the cheapest way into the shape, but you inherit the rotary MMI and the earliest software. The 2019-on facelift brought the touchscreen MMI, mild-hybrid 12-volt assistance on several engines, and subtly sharper styling, and these are the cars we would target at the top of the budget. Below is our reliability read by year band, scored 0 to 100 on owner sentiment, recall load and the cost of the faults that crop up, not a workshop test.

Recalls and the DVSA history to run before you buy

The A5 and S5 range has been subject to several DVSA safety recalls over the F5 run, covering items raised across the wider A4 and A5 family rather than one signature fault. None of it should scare you off, but every used buyer should run the registration through the free government recall checker before handing over money, and again confirm the work was done with the selling dealer. Check the live record at the DVSA vehicle recall service on gov.uk. Pair that with an HPI check for finance and write-off history, and a cambelt-or-chain note for the diesel.

According to Honest John owner reviews, the recurring real-world themes on these cars are electronics and infotainment rather than catastrophic mechanical failure, which matches the survey picture and tells you where to spend your inspection time.

Running costs, insurance and warranty cover

Running costs are where engine choice pays off. A 40 TDI quattro will see 45mpg-plus on a steady motorway run; a 45 TFSI quattro asks for premium fuel and frequent fills if you use the performance. Servicing at a main dealer runs higher than an independent VAG specialist, and a major service with the S tronic fluid is the one to budget for. On cover, a manufacturer-approved used car brings a 12-month Audi warranty, but the gaps in that cover are worth knowing before you assume everything is protected; our comparison of BMW, Audi and Mercedes approved used warranty cover sets out what actually gets paid. If the car is out of manufacturer cover, weigh an aftermarket policy carefully and budget separately for the wear items above.

For a sense of how the A5 sits against its bigger executive sibling on cost and kit, our Audi A8 D5 used buyer’s guide is a useful counterpoint, and finance-minded buyers comparing monthly routes should read our breakdown of PCP versus HP on a used Audi before signing anything. You can browse the rest of our premium used coverage in the CDE buying guides section.

Pre-purchase checklist before you put a deposit down

Bring this to the viewing. One, full service history with the S tronic fluid change logged near 38,000-mile intervals. Two, a cold first start to listen for chain rattle and a slow car-park crawl to feel the dual-clutch. Three, oil level on the dipstick or digital readout, plus the seller’s honest answer on top-up frequency. Four, every screen, camera, sensor and your own phone paired through MMI. Five, the gov.uk recall check and an HPI check run in front of you. Six, tyres and brakes (quattro and S5 cars eat both), and a look for coolant weeping at the pump. A car that passes all six at the right price is a genuinely good thing; one that flunks two of them is someone else’s project.

Our take

An Audi A5 Sportback used buy is one of the best-looking ways to spend £15,000 to £30,000 on a premium five-door, and the depreciation has already done its worst. Our view: target a 2020-on facelift 40 TDI quattro with a complete service file and a logged S tronic fluid change, and you get the cross-country ability, the smarter touchscreen MMI and the most warranty headroom for the money. Petrol buyers should hold out for a 45 TFSI quattro with a spotless oil history, and only consider the 35 TFSI if your mileage is genuinely low and urban. The car to avoid is the cheap, high-mile, thin-history example, because the engine, S tronic and coolant risks on this generation are real and expensive. Buy on paperwork and condition, not on colour, and the A5 Sportback rewards you. Buy on price alone and it will find a way to cost you.