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Audi · Luxury · 2002–2004 Custom Search

Audi RS6 C5

Weaknesses, engine ratings and buying advice

★★★★★
1.0 / 5.0 · Based on 1 engine variants · How we rate

Body Variants

The Audi RS6 C5 is available as Sedan and Avant — choose your body type for specific insurance data:

Generations

Engine Overview

The Audi RS6 C5 is available with one engine variant at 480 hp.

RS6 · Petrol· 480 PS
2002 2004

The BCY was the first engine with 450 PS in an Audi in 2001 — when AMG and M were still considerably less powerful. 4.2-litre V8 biturbo with two turbos in the V between the cylinder banks, broad power delivery without the brutality of a high-revving naturally aspirated unit. The sound is deep and muted, not spectacular. Toothed belt instead of timing chain demands consistent servicing every 90,000 km — neglect means total engine loss. Weak points are in the ancillaries: intercoolers leak and damage the turbos, Tiptronic gearbox and DRC suspension drive up running costs. Engine removal often needed for any internal work. Front control arms are classic wear items.

  • !! Intercooler Hose Leaks from 60,000 km

    The intercooler hoses on the 4.2 V8 BiTurbo are known to be particularly weak. They detach or develop leaks, over-stressing the turbos and causing surge noises.

    Symptoms: Power loss, whistling noise, boost pressure drop, turbo surging
    200–600 $
    Ad intercoolerschläuche BCY RS6LLK Schlauch 4.2 V8 BiTurbo
  • !! Valve Lifter Failures with Secondary Damage from 120,000 km

    Loud noise during cold running points to broken valve lifters. Consequences include bent valves and damaged pistons with cylinder walls. The very thin valves are undersized for the engine's output.

    Symptoms: Loud hammering at cold start, increasing roughness, sudden power loss
    3,000–12,000 $
    Ad valvestößel 4.2 V8 BiTurbo BCYhydraulic lifter RS6 C5
  • !! Automatikgetriebe (Tiptronic) Verschleiß from 100,000 km

    The Tiptronic transmission in the RS6 C5 is wear-prone. Transmission oil and filter changes every 20,000 km significantly extend its life. Without maintenance, damage is possible past 100,000 km.

    Symptoms: Schaltfehler, Schaltruck, Rütteln beim Gangwechsel, Getriebenotlauf
    2,500–8,000 $
    Ad Tiptronic gearbox RS6 C5Automatikgearbox BCY 4.2 V8

+ 4 more engine weaknesses + vehicle weaknesses

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Known Problems and Issues +

A total of 7 weaknesses have been documented for the Audi RS6 C5 (2002–2004). One problem engine: BCY (4.2L V8 BiTurbo).

What to watch out for with the Audi RS6? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Audi RS6 C5 have? +
The Audi RS6 C5 has 7 known engine weaknesses.
What should I look for when buying a used Audi RS6 C5? +
faq.watch_a_avoid
Which engine is recommended? +
None of the available engines are rated 'Good Choice'. Stay away! The most fun to drive is the BCY (4.2L V8 BiTurbo). Problem engine: BCY (4.2L V8 BiTurbo) — stay away!
Which Audi RS6 C5 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Audi RS6 C5 — rated: "Legendary!". {description} The C5 RS6 as a saloon is the rarer variant — Avant owners bow in respect, but the saloon has its own appeal: more compact, lighter, even slightly more direct in handling. The BCY V8 sounds better decatalysed than the V10 of its successor — one long-term owner sold his C6 with 700 hp MTM conversion after six months and returned to the C5. More soul, more direct, less sterile. Timing belt every 90,000 km is non-negotiable; DRC suspension ages expensively.
Is the Audi RS6 C5 worth buying used? +
Caution is advised with the Audi RS6 C5 — 1 of 1 engine variants are rated 'Stay Away!'. The engine choice is crucial.
What horsepower variants are available for the Audi RS6 C5? +
The Audi RS6 C5 is available with engine variants from 480 to 480 hp. Petrol: BCY (4.2L V8 BiTurbo).

Last updated: February 2026 · All information without guarantee