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Hi guys, I have just bought a 2018 A5 2.0L Petrol Quattro (252ps) with 60k miles from a private seller (First Audi) Basic visual inspection, test drive were fine and it had a full Audi service history so was reassured. Shortly after sale I noticed a deep thumping from underneath the driver/passenger seats/ possibly a bit further back. It seems to happen in high torque situations, e.g. at low speed uphill, while gently applying the throttle. Specifically immediately after a gentle throttle pulse, I'll get a thump. Then when accelerating off, it will happen at a slightly higher frequency 'thump thump thump' as I'm pulling away...you can feel it more than you can hear it. It's irregular, not a rhythmic beating but more random. Furthermore when steering is locked and I accelerate, it happes at a very high frequency and becomes more like a rapid thumping that blends into a rumble. I took the car to my local mechanic who said no issues, just a loose undertray. Then took it to an indie who has experience with Audis and he found the rear transfer case of the gearbox is rattling badly - and thinks this is failing mechanically (videos attached of the rattle, more obvious on short clip). He also thinks replacing the gearbox will resolve the issue with the thumping. I was initially wondering whether it was a propshaft bearing issue from reading other forums. It was difficult to recreate the thumping noise with the car on the ramp and the wheels floating. Obviously the gearbox / rear transfer case does seem to have an issue and it's looking like a costly repair. Just wondering if anyone had any thoughts as to whether this is a complete replacement job, and whether this might be causing that deep thumping noise as well or is that possibly something else that will need doing? Regretting slightly the private sale at the moment. Shame as the car has been a beaut to drive until now. Thanks in advance 20250430_165306_2.mp4 20250430_165306_1.mp4

Hey Guys. I bought an A3 2008 1.8 TFSI in june. Car was running fine until a few months. I start to hear weird noises like pulsating or something from the front. The sound only occurs when the engine warmed up. It can be heard when idle or in gear. If I push little gas the noise starts coming faster. We tought it can be the drive belt / tensioner pulley. After it was changed for a new on, but the noise/sound came back again. It can be maybe the timing chain ? I dont really have idea now. Check out the video down below. VID_20191228_202258.mp4

Hi everybody, French here so, sorry for my poor English (I tried to write in English without Google translator :)) I've bought an Audi A1, 1.4 TFSI 185 last month (62000Km). I have some noises with the Stronic Gearbox, but not like the "normal" s-tronic metallic noises. First, I can hear a whistle (like Chewbacca noises ^^) -> Here a video of the noise : https://vimeo.com/256468769 And, when I park I can hear a little "clac" when I switch between D and R (like my old ford fiesta ^^) Someone has already heard this kind of noises ?