The Audi BSM is a 1,968 cc, inline — four turbo — diesel engine produced between 2008 and 2013. It belongs to the Volkswagen Group's EA189 engine family, featuring double overhead camshafts (DOHC), four valves per cylinder, and common rail direct injection with piezo injectors. In standard tune, it produces 103 kW (140 PS) with 320 Nm of torque, optimized for responsive mid — range performance and fuel — efficient operation in compact and mid — size platforms.
Fitted primari…
Production years 2008–2013 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6234).
The Audi BSM is a 1,968 cc inline-four turbo-diesel engine designed for compact and mid-size models (2008–2013). It combines common rail direct injection with DOHC 16-valve architecture to deliver strong low-end torque and efficient cruising. Designed to meet Euro 5 standards, it balances performance with emissions compliance in transverse and longitudinal applications.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 103 kW (140 PS) @ 4,000 rpm | |
Torque | 320 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-20 common rail (up to 1,800 bar), piezo injectors | |
Emissions standard | Euro 5 | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (VGT) | |
Timing system | Timing chain (double-row, front-mounted) | |
Oil type | VW 507 00 / 505 00 (SAE 5W-30) | |
Dry weight | 142 kg |
The Audi BSM was used across Audi's 8P/B7/B8 platforms with both transverse and longitudinal mounting and shared architecture with Volkswagen and SEAT units. This engine received platform-specific calibrations-intake tuning in the A3 and revised ECU maps in the A4-and from 2010, updated EGR coolers were introduced to reduce carbon accumulation, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
The BSM's primary reliability risk is EGR and intake carbon buildup, with elevated incidence in urban driving cycles. Audi internal field reports from 2011 indicated over 35% of pre-2010 units required EGR cleaning before 100,000 km, while UK DVSA MOT data shows a notable rise in emissions-related failures for TDI engines in city-operated vehicles. Short-trip usage and extended idling increase soot loading, making regular highway driving and maintenance critical.
Analysis derived from Audi technical bulletins (2008-2013) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The BSM is mechanically robust with a timing chain and advanced common rail system, but long-term reliability depends on driving patterns and maintenance. Pre-2010 models are prone to EGR clogging, which can affect performance. Using correct oil (VW 507 00) and adhering to 15,000 km service intervals helps prevent fuel pump and chain wear. Well-maintained engines regularly exceed 200,000 km.
The most documented issues are EGR valve/cooler clogging, DPF regeneration failure, and high-pressure fuel pump wear. Timing chain guide degradation and turbo actuator faults are also frequent. These are confirmed in Audi SIB 2010-04-01 and field service data. Regular cleaning and use of quality diesel significantly reduce occurrence.
The BSM engine was used in the Audi A3 (8P, 2008–2012), A4 (B7/B8, 2008–2013), and A6 (C6, 2008–2011), all in 2.0 TDI form. It was also shared across the Volkswagen Group in the Golf (5/6), Jetta, and SEAT Leon (1P). All applications feature transverse or longitudinal mounting with FWD or quattro drivetrains.
Yes. The BSM responds well to ECU remapping, with stage 1 tunes typically gaining 20–30 kW safely. The stock turbo and internals handle increased boost well up to ~160 kW. However, over-tuning without upgraded cooling or fueling can lead to DPF and EGR stress. Most owners pursue moderate gains while preserving reliability.
In combined driving, the BSM achieves approximately 5.2–5.8 L/100 km (54–49 mpg UK). City driving may see 6.5 L/100 km (43 mpg), while highway runs can reach 4.8 L/100 km (59 mpg). Real-world economy depends on driving style and DPF regeneration frequency. Carbon buildup can reduce efficiency by up to 15%.
Yes. The BSM is an interference engine, meaning that if the timing chain fails or jumps, the pistons can contact the open valves, resulting in bent valves or cylinder head damage. This underscores the importance of timely maintenance and immediate attention to any timing-related noises.
Audi specifies SAE 5W-30 oil meeting VW 507 00 (diesel) or 505 00 (multi-vehicle) standards. This low-SAPS synthetic oil ensures proper lubrication for the turbocharger, high-pressure pump, and EGR system. Oil changes every 15,000 km are essential to prevent premature wear and DPF contamination.
Comprehensive technical documentation and regulatory references
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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
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