The five-cylinder 2.5 TFSI is one of those engines you recognise by its sound before you've even seen the car. In the RS3 and TT RS, you've got the kind of power that, until recently, you'd only find in much bigger cars. But here's the thing! All that power needs looking after. Let me tell you how we service these cars at Das Auto Service, and why there are a few things I simply won't compromise on.
Why is engine oil so important in the Audi RS3 and TT RS 2.5 TFSI service guide?
Just think how hard the oil has to work in an engine with this much power. The loads are enormous, which is exactly why I recommend changing the engine oil and oil filter every 10,000 km or once a year, whichever comes first, for cars driven in Bulgaria, regardless of the oil used. If you take your car on track, shorten that interval even further. We use oil that meets the exact specification for your engine, as stated in your service book. Please don't try to save money here. It'll cost you more later.
When should we change the spark plugs and ignition coils?
Cylinder pressures are high, and the spark plugs have a much harder life than they would in an ordinary engine. That's why we change them earlier than the service schedule calls for, especially if you enjoy putting your foot down. If one of the cylinders starts misfiring, you'll feel it straight away. But please don't keep driving like that. You could damage the catalytic converter too, and that's when things start getting painful for your wallet.
What do you need to know about the S tronic gearbox?
The RS3 and TT RS have a seven-speed S tronic gearbox with wet dual clutches, built to handle high torque. We change the gearbox oil and filter every 60,000 km, and afterwards we always carry out a gearbox adaptation. If you drive hard and use launch control regularly, you're putting the gearbox under serious strain. That's why I'm telling you not to put off the service. If something breaks, the repair won't be cheap. And you're the one who ends up paying for it.
What do we service on the quattro system and Haldex?
The four-wheel-drive system relies on a fifth-generation Haldex coupling. We change its oil every 30,000 km. Skip that service and you risk the rear wheels no longer receiving power. And when that happens, the car can become unstable if you pull away hard. Trust me, on an RS model, that's the last thing you want.
Why do we check the brakes at every service?
The brakes on RS models have to cope with enormous temperatures, especially when you're driving hard. We change the brake fluid every two years, or before and after the track season if you take your car on circuit. We also inspect the brake pads and discs at every service. Because what's the point of having all that horsepower if you can't stop properly?
Don't chip-tune an engine that's already close to its power limit. You'll be putting more strain on the gearbox, clutch and engine than they were designed to handle. And when something breaks, the repair bill can be enormous. I'm telling you this because, at the end of the day, you're the one who has to pay it.
A tip from Kris Mladenov: After a spirited drive, let the engine idle for about a minute before switching it off. That gives the turbo time to cool down more gradually.
If you drive an RS3 or TT RS, you already know there's nothing ordinary about the engine under your bonnet. So please don't treat its servicing like that of an ordinary car. At Das Auto Service, we'll check what your car needs and tell you what should be done now and what can safely wait. We won't invent repairs you don't need. But we won't overlook something that could leave you with a nasty bill later, either.
The solution in our shop
Genuine Longlife III FE 0W30 engine oil 5L
Genuine engine oil meeting the specification for the 2.5 TFSI. We change it, along with the oil filter, every 10,000 km or once a year, whichever comes first.
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Genuine DSG gearbox oil G052182A2 1l
Genuine gearbox oil for the wet-clutch S tronic. We change it every 60,000 km.
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Genuine Haldex oil G060175A2 850ml
Genuine oil for the fifth-generation Haldex coupling in the quattro system.
View in our shopRead more
- Routine servicing at Das Auto Service
- Gearbox servicing
- 1.8 and 2.0 TFSI: Ignition coils and spark plugs
- Haldex generations 1 to 5: When and how should I service it?
- RS exhaust system: Valves, sound and repairs
- Audi RS gearbox oil change: How we do it
Frequently asked questions
How often should I change the engine oil in my RS3?
I recommend changing the engine oil and oil filter every 10,000 km or once a year, whichever comes first. If you take your car on track, change them more often.
When should I change the S tronic oil in my RS3 or TT RS?
Every 60,000 km, along with the filter. After the oil change, we always carry out a gearbox adaptation.
Should I change the spark plugs more often on the 2.5 TFSI?
If you enjoy spirited driving, don't wait until the end of the service interval. The spark plugs in this engine work under serious pressure.