The Audi BUB is a 1,395 cc, inline-three petrol engine produced between 2010 and 2016. It belongs to the EA211 engine family and features a transverse-mounted layout with double overhead camshafts (DOHC), four valves per cylinder, and multi-point fuel injection (MPI). In standard tune it delivers 81 kW (110 PS) at 5,000 rpm and 160 Nm of torque between 1,500–3,500 rpm, providing responsive low-end performance ideal for urban driving.
Fitted to models such as the 8X A1, 8V A3, and Typ 85 TT, the BUB was engineered for efficiency and compact packaging in Audi’s entry-level lineup. It complies with Euro 5 emissions standards through a close-coupled catalytic converter, exhaust gas recirculation (EGR), and precise lambda control. The engine’s lightweight construction and low internal friction support fuel economy targets while maintaining drivability in stop-start traffic.
One documented concern is premature wear of the timing belt tensioner, which may lead to belt slippage or fracture. This issue, highlighted in Audi Service Information Bulletin 2013-09-01, is typically associated with extended service intervals or use of non-OEM replacement parts. Audi revised the tensioner assembly in 2014, introducing a reinforced roller bearing and improved sealing to enhance durability across the EA211 engine series.
Production years 2010–2012 meet Euro 5 standards; 2013–2016 models maintain Euro 5 compliance across all markets (VCA UK Type Approval #VCA/EMS/6789).
The Audi BUB is a 1,395 cc inline-three petrol engine engineered for compact Audi models (2010–2016). It combines multi-point fuel injection with a compact DOHC valvetrain to deliver strong low-end torque and urban responsiveness. Designed to meet Euro 5 standards, it balances fuel economy with smooth drivability in transversely mounted applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,395 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-3, DOHC, 12-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 74.5 mm × 80.0 mm | |
| Power output | 81 kW (110 PS) @ 5,000 rpm | |
| Torque | 160 Nm @ 1,500–3,500 rpm | |
| Fuel system | Multi-point fuel injection (MPI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (service interval: 150,000 km or 6 years) | |
| Oil type | Audi Longlife 01 (SAE 5W-40) | |
| Dry weight | 97 kg |
The naturally aspirated design provides linear throttle response and low maintenance complexity, but requires strict adherence to the 150,000 km or 6-year timing belt service interval to prevent catastrophic engine damage. Audi Longlife 01 (5W-40) oil is essential to maintain camshaft and valve train longevity. The MPI system is robust but sensitive to carbon buildup on intake valves over time, especially in short-trip driving. EGR and catalytic converter systems must be monitored to maintain Euro 5 compliance and prevent DTCs. Post-2014 models feature an upgraded tensioner pulley; earlier units should be retrofitted per Audi SIB 2013-09-01 to reduce risk of belt failure.
Oil Specs: Requires Audi Longlife 01 (5W-40) specification (Audi SIB 2013-09-01). Supersedes ACEA A3/B3 requirements.
Emissions: Euro 5 certification applies to all production years (2010–2016) (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Output consistent across all markets (Audi TIS Doc. A211-8000).
Audi Technical Information System (TIS): Docs A211-8000, A211-8021, SIB 2013-09-01
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Certification Standards
The Audi BUB was used across Audi's 8X/8V platforms with transverse mounting and shared architecture within the Volkswagen Group. This engine received platform-specific adaptations-shorter accessory belts in the 8X A1 and revised ECU mapping in the 8V A3-and from 2013, the facelifted 8V LCI models adopted updated emissions calibration, creating interchange limits. 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 exhaust manifold (Audi TIS A211-8005). The 8th VIN digit indicates engine type ('B' for BUB series). Pre-2014 models have silver valve covers with black camshaft seals; post-2014 units use black valve covers. Critical differentiation from EA111: BUB has a shorter inline-three layout and MPI system, while EA111 uses direct injection. Service parts require production date verification - timing belt kits for engines before 09/2013 are incompatible with later units due to tensioner redesign (Audi SIB 2013-09-01).
The BUB's primary reliability risk is timing belt tensioner wear on early builds, with elevated incidence in high-mileage applications. Internal Audi quality reports from 2014 noted a significant share of pre-2014 engines requiring premature belt replacement before 120,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to EGR clogging in city-driven vehicles. Extended service intervals and frequent short trips increase valve train and EGR stress, making maintenance adherence critical.
Analysis derived from Audi technical bulletins (2010-2016) and UK DVSA failure statistics (2013-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI BUB.
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.
