The Audi BFM is a 2,797 cc, V6 petrol engine produced between 1999 and 2004. It features a DOHC 24-valve configuration with sequential multi-point fuel injection (MPE) and individual throttle bodies for improved throttle response. Designed as part of the Volkswagen Group's 2.8L V6 family, it delivered 140 kW (190 PS) and 270 Nm of torque, primarily used in transverse-engine applications.
Fitted to models such as the Audi A4 (B5), A6 (C5), and VW Passat (B5), the BFM engine was engineered for smooth refinement and linear power delivery in executive sedans and wagons. Emissions compliance was achieved through a three-way catalytic converter and lambda control system, meeting Euro 3 standards across its production run.
One documented concern is premature wear of the timing chain tensioner, particularly on high-mileage units. This issue, referenced in Volkswagen Group Service Bulletin 01 07 03, is attributed to oil flow restriction in the tensioner hydraulic piston under extended service intervals. Later production revisions improved oil feed design, and Audi recommended inspection of the chain system at 120,000 km as a preventive measure.
Production years 1999–2004 meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi BFM is a 2,797 cc V6 petrol engine engineered for transverse-layout sedans and wagons (1999–2004). It combines DOHC 24-valve architecture with sequential multi-point injection to deliver smooth, linear performance. Designed to meet Euro 3 standards, it balances drivability with moderate fuel consumption for its class.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,797 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.5 mm × 83.0 mm | |
| Power output | 140 kW (190 PS) @ 6,000 rpm | |
| Torque | 270 Nm @ 3,200 rpm | |
| Fuel system | Sequential multi-point fuel injection (MPE) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | N/A | |
| Timing system | Double-row timing chain (front-mounted) | |
| Oil type | VW 502 00 / 5W-40 | |
| Dry weight | 178 kg |
The naturally aspirated V6 delivers smooth, predictable power ideal for relaxed cruising but requires consistent oil maintenance to protect the front-mounted timing chain. VW 502 00 (5W-40) oil is essential due to its shear stability and additive package supporting hydraulic tensioner operation. Extended oil intervals beyond 15,000 km increase risk of tensioner failure. The MPE system is sensitive to vacuum leaks and throttle body contamination, requiring periodic cleaning and adaptation resets. Pre-2002 models should have the updated tensioner gasket and oil feed spacer per VW SIB 01 07 03. Catalytic converter longevity depends on proper lambda sensor function and fuel trim control.
Oil Specs: Requires VW 502 00 specification (5W-40) (VW SIB 01 07 03). Compatible with ACEA A3/B3.
Emissions: Euro 3 certification applies to all BFM production years (1999–2004) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under DIN 70020 standards. Output consistent across fuel qualities meeting EN 228.
Audi Technical Information System (TIS): Docs A31055, A31277, SIB 01 07 03
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Audi BFM was used across Audi's B5/C5 platforms with transverse mounting and shared with Volkswagen and SEAT for longitudinal and transverse applications. This engine received platform-specific adaptations-shorter intake manifolds in the A4 and revised engine mounts in the A6-and from 2002 the facelifted A4 Avant models adopted minor ECU recalibrations, creating interchange limits. Partnerships allowed Volkswagen's Passat and Phaeton variants to use the same core architecture. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the alternator (Audi TIS A31100). The 8th VIN digit indicates engine type ('M' for 2.8 V6 petrol). Pre-2002 models have silver valve covers with black coil packs; post-2002 units use black valve covers. Critical differentiation from ABZ/ACK variants: BFM has sequential MPE injection and individual throttle bodies, while ABZ uses banked injection. Service parts require production date verification - timing chain kits for engines before 08/2001 are incompatible with later units due to tensioner redesign (VW SIB 01 07 03).
The BFM's primary reliability risk is timing chain tensioner wear on pre-2002 builds, with elevated incidence in vehicles with extended oil intervals. Internal Volkswagen Group quality reports from 2003 noted a significant share of BFM engines requiring tensioner replacement before 150,000 km, while UK DVSA MOT records show increased engine-related failures in high-mileage A6 models. Infrequent oil changes and stop-start driving increase wear on the hydraulic piston, making oil quality and interval adherence critical.
Analysis derived from Volkswagen Group technical bulletins (1999–2005) and UK DVSA failure statistics (2000–2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI BFM.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
