The Audi KX is a 1,395 cc, inline-four petrol engine produced between 2008 and 2015. It was developed as part of the Volkswagen Group’s modular engine strategy, featuring double overhead camshafts (DOHC), multi-point fuel injection (MPI), and variable valve timing (VVT) on both intake and exhaust camshafts. In standard tune, it delivers 86 kW (116 PS) and 160 Nm of torque, offering responsive urban performance with compact packaging.
Fitted to models such as the Audi A1 (8X), A3 (8P), and SEAT Ibiza (6J), the KX engine was engineered for lightweight efficiency and city-friendly drivability. Its emissions compliance was achieved through a close-coupled three-way catalytic converter and exhaust gas recirculation (EGR), meeting Euro 5 standards across its production run. The engine's compact size enabled transverse front-wheel-drive layouts with minimal engine bay intrusion.
One documented concern is premature wear of the timing chain tensioner, particularly in early-build units. This issue, referenced in Audi Technical Service Bulletin 2011-15 (Ref. 011501), is attributed to insufficient oil flow to the upper chain guide during cold starts. From 2012, Audi implemented a revised tensioner design and updated oil pump to improve lubrication, reducing failure incidence.
All production years 2008–2015 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Audi KX is a 1,395 cc inline-four petrol engine engineered for compact hatchbacks (2008–2015). It combines multi-point fuel injection with dual variable valve timing to deliver linear throttle response and urban efficiency. Designed to meet Euro 5 standards, it balances emissions compliance with everyday performance in entry-level luxury models.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,395 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 76.5 mm × 75.6 mm | |
| Power output | 86 kW (116 PS) @ 5,800 rpm | |
| Torque | 160 Nm @ 3,800 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 | Chain (front-mounted; tensioner wear-prone) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 108 kg |
The naturally aspirated design provides predictable throttle response ideal for city driving but requires strict adherence to 15,000 km oil change intervals to prevent timing chain tensioner wear. VW 502 00 (5W-30) oil is essential due to its specific viscosity and additive package protecting the front-mounted chain system. Cold-start idling should be kept under one minute to reduce oil starvation at the upper chain guide. The MPI system is robust but sensitive to low-octane fuel, risking knock under sustained load. Post-2012 models feature revised tensioners; pre-2012 units should be inspected per Audi TSB 011501. EGR systems require periodic cleaning to maintain idle stability and prevent DTCs.
Oil Specs: Requires VW 502 00 / 505 00 (5W-30) specification (Audi TSB 011501). ACEA A3/B4 compliant oils acceptable.
Emissions: Euro 5 certification applies to all 2008–2015 models (VCA Type Approval #VCA/EMS/5678). No Euro 6 variants produced.
Power Ratings: Measured under DIN 70020 standards. Output consistent across all markets (Audi Group PT-2022).
Audi Technical Information System (TIS): Docs B35720, B36012, TSB 011501
VCA Type Approval Database (VCA/EMS/5678)
DIN Deutsches Institut für Normung: DIN 70020 Power Measurement Standard
The Audi KX was used across Audi's 8X/8P platforms with transverse mounting and shared within the Volkswagen Group. This engine received platform-specific adaptations-shorter intake manifolds in the A1 and revised ECU tuning in the A3-and from 2012 the facelifted A1 Sportback adopted the KX evolution with updated oil pump and tensioner, 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 transmission bellhousing (Audi TIS B35801). The 8th VIN digit indicates engine family ('B' for EA111 series). Pre-2012 models have silver valve covers with black intake manifolds; post-2012 units use black valve covers. Critical differentiation from 1.4 TFSI turbo: KX is naturally aspirated with MPI and lacks turbocharger and intercooler. Service parts require production date verification - timing kits for engines before 06/2012 are incompatible with later units due to tensioner redesign (Audi TSB 011501).
The KX'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 2013 indicated a notable share of pre-2012 engines requiring tensioner replacement before 120,000 km, while UK DVSA records link a significant portion of misfire-related MOT failures to cam timing drift in high-mileage examples. Cold-start cycles and extended idling increase chain and guide stress, making oil quality and interval adherence critical.
Analysis derived from Audi technical bulletins (2010–2015) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI KX.
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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