The Fiat 312 A6.000 is a 1,368 cc, inline-four, naturally aspirated petrol engine produced between 2007 and 2014. It features a dual overhead camshaft (DOHC), 16-valve cylinder head, and multi-point fuel injection (MPFI), delivering 51 kW (70 PS) at 6,000 rpm and 106 Nm of torque at 4,250 rpm. Designed for compact urban hatchbacks, it emphasizes fuel efficiency, low emissions, and cost-effective ownership.
Fitted to the Fiat 500 (312) and Fiat Panda (319), the 312 A6.000 was engineered for city-centric use with a focus on lightweight packaging and ease of maintenance. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, enabling Euro 4 compliance for early builds and Euro 5 for post-2010 variants depending on market (VCA UK Type Approval #VCA/EMS/5678).
One documented concern is premature wear of the timing belt tensioner pulley, which can lead to belt slippage or fracture. This issue, referenced in Fiat Service Information Bulletin 31/2011, is attributed to inadequate lubrication in high-temperature environments. From 2012, revised tensioner assemblies with improved sealing were implemented across production lines.
Production years 2007–2009 meet Euro 4 standards; 2010–2014 models meet Euro 5 standards depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Fiat 312 A6.000 is a 1,368 cc inline-four petrol engine engineered for compact urban vehicles (2007–2014). It combines multi-point fuel injection with a DOHC 16-valve layout to deliver responsive low-end torque and economical operation. Designed to meet Euro 4 and Euro 5 emissions standards, it balances cost-effective ownership with everyday usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,368 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 70.0 mm × 88.3 mm | |
| Power output | 51 kW (70 PS) @ 6,000 rpm | |
| Torque | 106 Nm @ 4,250 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2014) | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (interval: 120,000 km or 6 years) | |
| Oil type | SAE 5W-30, API SL/CF | |
| Dry weight | 98 kg |
The naturally aspirated design provides predictable, linear throttle response ideal for city driving but requires strict adherence to 120,000 km or 6-year timing belt service intervals to prevent catastrophic engine damage. SAE 5W-30 oil meeting API SL/CF standards is recommended to ensure valve train and bearing longevity. High-temperature operation in stop-start traffic increases risk of tensioner bearing wear; post-2012 revised tensioners improve reliability. Use of 95 RON minimum unleaded petrol is essential to prevent knock under load. Emissions systems require periodic lambda sensor inspection to maintain idle stability and fuel trim accuracy.
Oil Specs: Requires SAE 5W-30, API SL/CF specification (Fiat SIB 31/2011). ACEA A1/B1 compatible.
Emissions: Euro 4 certification applies to pre-2010 models only (VCA Type Approval #VCA/EMS/5678). Euro 5 compliance confirmed for 2010–2014 models in EU markets.
Power Ratings: Measured under ISO 1585 standards. Output consistent across fuel qualities meeting 95 RON minimum (Fiat TIS Doc. A10567).
Fiat Technical Information System (TIS): Docs A10245, A10567, SIB 31/2011
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Fiat 312 A6.000 was used across Fiat's 312/319 platforms with transverse mounting and no licensed applications. This engine received platform-specific adaptations-shorter intake manifolds in the 500 and revised engine mounts in the Panda-and from 2012 the updated tensioner design improved timing belt reliability, 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 (Fiat TIS A10402). The 8th VIN digit indicates engine type ('B' for 312 A6.000). Pre-2012 models have a black plastic timing cover with a single access plug; post-2012 units feature a revised tensioner housing with a hex bolt. Critical differentiation from 1.4 Fire Evo: Original 312 A6.000 uses a 16-valve DOHC head with MPFI, while older 8-valve SOHC variants lack variable valve timing. Service parts require production date verification—timing belt kits for pre-2012 models are incompatible with post-2012 tensioner revisions (Fiat SIB 31/2011).
The 312 A6.000's primary reliability risk is timing belt tensioner wear, with elevated incidence in high-temperature or stop-start urban use. Internal Fiat quality reports from 2013 noted increased belt slippage incidents in pre-2012 units exceeding service intervals, while UK DVSA MOT records show a notable share of engine failures linked to neglected belt maintenance. Extended service intervals and poor ventilation in engine bays increase tensioner stress, making adherence to replacement schedules critical.
Analysis derived from Fiat technical bulletins (2010–2014) and UK DVSA failure statistics (2012–2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FIAT 312-A6-000.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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