The Audi BHC is a 1,984 cc, inline-four petrol engine produced between 2008 and 2012. It forms part of the EA113 engine family and features double overhead camshafts (DOHC), multi-point fuel injection, and variable valve timing on both intake and exhaust camshafts (Audi AVS). In standard tune it delivers 103 kW (140 PS), with peak torque of 200 Nm available from 3,500 rpm.
Fitted to models such as the 8P A3, 8E A4, and Typ 53 TT, the BHC was engineered for balanced performance and everyday usability in compact and mid-size Audi vehicles. Its driving character emphasizes smooth throttle response and mid-range flexibility. Emissions compliance was achieved through a three-way catalytic converter and lambda control, allowing Euro 4 compliance across all production years.
One documented concern is premature wear of the timing chain tensioner, which may lead to chain slack and noise under cold start conditions. This issue, referenced in Audi Service Bulletin 2010-15, is typically associated with extended oil change intervals or incorrect oil viscosity. From 2010, revised tensioner components were implemented across the EA113 engine line to improve long-term reliability.
Production years 2008–2012 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi BHC is a 1,984 cc inline-four petrol engine engineered for compact and mid-size platforms (2008–2012). It combines DOHC architecture with Audi's variable valve timing (AVS) to deliver responsive mid-range performance. Designed to meet Euro 4 emissions standards, it balances drivability with fuel efficiency in front-wheel-drive configurations.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 103 kW (140 PS) @ 5,800 rpm | |
| Torque | 200 Nm @ 3,500 rpm | |
| Fuel system | Multi-point fuel injection (MPI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain (tensioner wear-prone) | |
| Oil type | VW 502 00 / 5W-30 | |
| Dry weight | 142 kg |
The naturally aspirated design provides linear power delivery ideal for urban and mixed driving but demands strict adherence to 15,000 km oil service intervals to prevent timing chain wear. VW 502 00 (5W-30) oil is essential due to its shear stability and protection of the chain tensioner mechanism. Cold-start idling should be kept brief to ensure prompt oil pressure build-up. The MPI system is robust but sensitive to poor fuel quality, requiring regular use of Top Tier petrol to prevent intake valve coking. Post-2010 models feature upgraded tensioners; pre-2010 units should be inspected per Audi SIB 2010-15. Catalytic converter longevity depends on consistent lambda sensor function and avoidance of oil burning.
Oil Specs: Requires VW 502 00 (5W-30) specification (Audi SIB 2010-15). ACEA A3/B3 equivalent acceptable.
Emissions: Euro 4 certification applies to all BHC models (2008–2012) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel grades meeting EN 228 (Audi TIS Doc. A113-901).
Audi Technical Information System (TIS): Docs A113-770, A113-882, SIB 2010-15
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Audi BHC was used across Audi's 8P/8E platforms with transverse mounting. This engine received platform-specific adaptations-shorter accessory drives in the 8P A3 and revised cooling routing in the 8E A4-and from 2010 the facelifted 8P LCI models adopted updated engine management software, creating minor calibration differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side cylinder block near the transmission bellhousing (Audi TIS A113-890). The 8th VIN digit indicates engine type ('B' for BHC series). Pre-2010 models have silver valve covers with ribbed finish; post-2010 units use dark grey covers. Critical differentiation from similar EA113 units: BHC features dual AVS actuators and MPI fuel system. Service parts require production date verification—timing tensioners for engines before 06/2010 are incompatible with later units due to internal redesign (Audi SIB 2010-15).
The BHC's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in short-trip urban use. Internal Audi quality reports from 2011 noted increased warranty claims for chain noise in pre-2010 units, while UK DVSA records show a notable portion of emissions-related failures linked to lambda sensor degradation in high-mileage examples. Cold-start cycles and extended oil intervals increase tensioner stress, making oil quality and service adherence critical.
Analysis derived from Audi technical bulletins (2008–2012) and UK DVSA failure statistics (2012–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI BHC.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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