The Audi CBRA is a 1,968 cc, inline — four turbo — diesel engine produced between 2008 and 2018. It features common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). Delivering 103 kW (140 PS) in standard tune, it provides strong low — end torque ideal for daily driving and efficient highway cruising.
Fitted to models such as the A3 (8P), A4 (B7/B8), A6 (C6/C7), and Q5 (83), the CBRA engine was engineered for balanced performan…
Production years 2008–2009 meet Euro 4 standards; 2010–2018 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Audi CBRA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size applications (2008–2018). It combines common-rail direct injection with a variable geometry turbocharger to deliver responsive low-RPM torque and stable highway performance. Designed to meet Euro 4 and Euro 5 emissions standards, it balances real-world efficiency with drivability.
| 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) | |
Torque | 320 Nm @ 1,500–2,500 rpm | |
Fuel system | Bosch CRS 2.0 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2018) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Honeywell) | |
Timing system | Chain-driven (front-mounted, low wear risk) | |
Oil type | VW 507 00 / 5W-30 | |
Dry weight | 148 kg |
The Audi CBRA was used across Audi's 8P/B7/B8/C6/C7 platforms with longitudinal mounting. This engine received platform-specific adaptations-shorter intake tracts in the A3 and revised cooling layouts in the Q5-and from 2013 the facelifted A6 C7 adopted Euro 5+ calibration with SCR integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CBRA's primary reliability risk is high-pressure fuel pump degradation, with elevated incidence in urban-driven vehicles with short-trip usage. Internal Audi quality reports from 2012 indicated a notable share of pre-2013 units requiring HPFP replacement before 150,000 km, while UK DVSA records show EGR cooler failures contributing to emissions-related MOT failures. Extended oil intervals and low-quality diesel increase pump and EGR stress, making fluid quality and maintenance adherence critical.
Analysis derived from Audi technical bulletins (2009–2016) and UK DVSA failure statistics (2015–2023). 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 CBRA is generally robust when maintained properly, though pre-2013 models are prone to HPFP issues if low-quality diesel is used. Later Euro 5 variants with updated pumps and SCR integration show improved durability. Regular oil changes with VW 507 00 spec oil and use of quality diesel are essential for long-term reliability beyond 150,000 km.
The most documented issues are high-pressure fuel pump wear, EGR cooler clogging or cracking, turbo actuator sticking, and valve cover oil leaks. These are confirmed in Audi service bulletins and field reports. Emissions system faults are more common in vehicles with frequent short trips that inhibit DPF regeneration.
The CBRA 2.0 TDI 140 PS was used in the A3 (8P), A4 (B7/B8), A6 (C6/C7), and Q5 (83) from 2008 to 2018. It was phased out in favour of the EA288 evo engine post-2018. Applications span hatchback, sedan, estate, and SUV body styles across Audi's lineup.
Yes, the CBRA responds well to ECU remapping. Stage 1 tunes typically yield 165–175 PS safely, as the stock turbo and internals handle increased torque. However, exceeding 180 PS without upgraded cooling or fuel system components may stress the HPFP and EGR system, especially on pre-2013 models.
In real-world driving, the CBRA achieves 5.0–6.0 L/100km (47–56 mpg UK) in mixed conditions. Highway efficiency is excellent at ~4.5 L/100km (~62 mpg UK). Smaller models like the A3 achieve slightly better economy than heavier Q5 or A6 variants. Actual figures depend on driving style and DPF regeneration frequency.
Yes, the CBRA is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in bent valves or cylinder head damage. However, the front-mounted chain design is robust and rarely fails when maintenance is up to date.
Audi specifies VW 507 00 5W-30 synthetic oil for the CBRA engine. This low-SAPS formulation is critical for DPF and turbo longevity. Oil changes should occur every 15,000 km or annually to ensure fuel pump lubrication and prevent sludge buildup in the EGR and CCV systems.
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
Type-approval guidance and documentation.
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