Have a used Audi RS4 inspected: on-site used-car inspection, from €289

The Audi RS4 is one of the most compelling used cars in the performance-estate segment — and at the same time one of the riskiest vehicles you can buy without an independent inspection. checkdenwagen.de is an independent provider of on-site used-car inspections operating Germany-wide, based in Berlin with a network of inspectors across Germany. An experienced automotive appraiser from this network drives to where the vehicle is located, assesses your chosen RS4 over roughly 1.5 hours against an inspection catalogue of more than 100 points and delivers you a digital photo report within 24 hours. The central risk when buying an RS4 lies in the high-revving naturally aspirated engines of the B7 and B8 generations: the 4.2 FSI V8 — whether BNS (B7) or CFSA (B8) — structurally consumes more oil than a normal production engine and has chain tensioners that can fail at high mileage and with short oil-change intervals. Replacing the timing chain on the B7 V8 requires removing the engine, which pushes the cost into a dimension that puts the purchase price into perspective. On the B7 there is also the Dynamic Ride Control suspension (DRC), whose hydraulic lines develop age-related leaks, and on the B8 the S tronic mechatronics unit (DL501), which becomes one of the most expensive single failures on the vehicle when the gearbox-oil change is neglected. On the B9 (2.9 TFSI V6 biturbo), boost behaviour, OPF condition and service history are the relevant inspection fields. Our USP: independent of the seller, transparent on price, on-site Germany-wide. Four things set us apart from a quick test drive: We are independent of any sales pressure. We measure with our own equipment. We read out all control units. And we know the RS4 weak points by model series. Phone: 030 301 32 327.

Across its three generations, the Audi RS4 has run through very different drivetrain concepts that differ fundamentally in their weak-point profile. B7 RS4 (2006-2008, engine 4.2 FSI V8 BNS): The B7 RS4 is considered the purest of the RS4 generations — a naturally aspirated 4.2-litre V8 with 420 hp that revs to 8,250 rpm. The sound experience is legendary, the risk profile considerable. The timing chains and their chain tensioners are the central weak point: at high mileage or with overly long oil-change intervals, the chain tensioner can give way, causing the characteristic cold-start rattle. Replacing the timing chain on the BNS engine requires removing the engine entirely from the vehicle — a circumstance that makes this the most expensive recurring maintenance item on this car. Further weak points: structurally elevated oil consumption from piston-ring wear, the Dynamic Ride Control suspension (DRC) with hydraulically linked shock absorbers, which becomes maintenance-intensive with leaking lines or faulty damper units, and the carbon airbox as a target for repairs after track-day overheating. Track use is common on the B7 RS4 and often concealed. B8 RS4 Avant (2012-2015, engine 4.2 FSI V8 CFSA): The B8 RS4 Avant also relies on a 4.2-litre V8 — this time the CFSA, structurally related to the BNS but modified. Oil consumption and chain tensioners remain relevant inspection topics. New is the S tronic mechatronics unit DL501 (seven-speed wet-clutch gearbox, in the RS4 models): a missed gearbox-oil service leads to worn mechatronics actuators that make for an expensive single part when they fail. The B8 RS4 was less often used as a track-day platform than the B7, but as a sportily driven estate with high mileage, suspension wear and the standard brake system are relevant inspection fields. B9 RS4 Avant (from 2017, engine 2.9 TFSI V6 biturbo EA839): The B9 RS4 Avant switches to a 2.9-litre V6 biturbo (EA839, 450 hp) and thus to a fundamentally different engine concept. The high-revving timing-chain problem of the V8 generations is gone. Instead, boost behaviour and turbocharger condition take centre stage, along with the gasoline particulate filter (OPF) on vehicles from 2019, which can clog under predominantly short-trip driving. The 8-speed Tiptronic on this model is more robust than the S tronic of the B8 generation, but likewise relies on regular gearbox-oil service. As the most recent generation, the B9 RS4 has the lowest risk profile — but also the highest used-car prices.

Every RS4 generation has a different engine — and therefore a different character and risk profile. The decision depends on your usage profile, your budget and your relationship to maintenance effort. 4.2 FSI V8 BNS (B7 RS4, 2006-2008): The BNS is the most emotional RS4 engine — a high-revving naturally aspirated unit, 420 hp, no turbo, up to 8,250 rpm. For many, the sound and rev experience is the real reason to buy. The price: high oil consumption, chain-tensioner risk and a timing-chain replacement that requires removing the engine. Anyone who buys a B7 RS4 with documented chain-tensioner service, short oil-change intervals and a clear track-day history gets a vehicle with outstanding character — but the inspection effort has to match that character. 4.2 FSI V8 CFSA (B8 RS4 Avant, 2012-2015): The CFSA shares the basic concept of the BNS and its weak-point profile around chain tensioners and oil consumption. Added to this is the S tronic mechatronics unit DL501 as a risk topic in its own right. In everyday use, the B8 RS4 is more comfortable than the B7 thanks to the Avant body and more modern assistance technology — but the engine risk profile remains comparable. A B8 RS4 with documented DL501 gearbox-oil service and a clean engine-oil rhythm is a very attractive vehicle. 2.9 TFSI V6 biturbo EA839 (B9 RS4 Avant, from 2017): The switch to the V6 biturbo marks a paradigm shift in the RS4. The high-revving V8 sound is history — in return you get torque that is usable earlier and across a wider range, lower fuel consumption and a noticeably more relaxed maintenance risk. The chain-tensioner drama of the V8 generations does not exist on the EA839. The B9 RS4 is the more sensible choice for anyone who wants to combine RS4 performance with predictable running costs.

The used market for the Audi RS4 is strongly demand-driven and shows considerable price differences depending on generation, condition and documentation. B7 RS4 (2006-2008): As a cult vehicle with a free-revving V8, well-kept examples of the B7 RS4 have risen in value. Cars with a complete, gap-free service history, documented chain-tensioner service and a clear usage history trade considerably higher than examples with gaps in the service booklet. A track-day history without corresponding maintenance records is a clear price dampener. The collector value makes tampered odometer readings a relevant issue on rare B7 examples. B8 RS4 Avant (2012-2015): The price spread between well-maintained and neglected examples is considerable. A B8 RS4 with documented DL501 gearbox-oil service, a recent oil change and a fault-free DRC service history is worth substantially more than an identical vehicle without this documentation — because the damage potential is directly reflected in the replacement value. B9 RS4 Avant (from 2017): As the most recent model, the B9 has the highest used-car prices and the lowest depreciation. The lower engine risk profile justifies a higher premium over the B7/B8 — but here too: accident history, OPF condition and service history determine the real value. The Premium package adds a qualitative market-price assessment to the inspection.