The Ford NA2A is a 1,299 cc, inline‑four naturally aspirated petrol engine produced between 2002 and 2008. It features a single overhead camshaft (SOHC), 8‑valve architecture and sequential multi‑point fuel injection. In standard form it delivered 55 kW (75 PS) at 5,200 rpm and 110 Nm of torque at 3,500 rpm, offering responsive urban drivability and low running costs.
Fitted to models such as the Mk5 Fiesta and Streetka, the NA2A was engineered for entry‑level affordability, fuel efficiency, and ease of maintenance in compact city applications. Emissions compliance was achieved through a three‑way catalytic converter and closed‑loop engine management, allowing Euro 4 compliance across all production years.
One documented concern is premature wear of the exhaust camshaft lobe in high‑mileage units, highlighted in Ford Technical Service Bulletin TSB‑04‑09‑12. This is attributed to marginal lubrication under sustained high‑load conditions. Ford addressed this in later production batches with revised camshaft metallurgy and updated oil specifications.
All production years 2002–2008 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/9321).
The Ford NA2A is a 1,299 cc inline‑four naturally aspirated petrol engine engineered for compact city cars (2002–2008). It combines sequential multi‑point fuel injection with a single overhead camshaft to deliver responsive low‑rpm performance and serviceability. Designed to meet Euro 4 emissions standards, it prioritises cost‑effective ownership and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,299 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 71.9 mm × 80.0 mm | |
| Power output | 55 kW (75 PS) @ 5,200 rpm | |
| Torque | 110 Nm @ 3,500 rpm | |
| Fuel system | Sequential multi‑point injection (Bosch ME7.0) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Ford WSS‑M2C913‑B (SAE 5W‑30) | |
| Dry weight | 98 kg |
The SOHC design ensures mechanical simplicity but requires oil changes every 10,000 km using Ford WSS-M2C913-B (5W-30) to prevent cam lobe wear, especially in stop-start urban driving. The Bosch ME7.0 ECU mandates 95 RON minimum unleaded fuel to maintain emissions compliance. Exhaust gas recirculation is not fitted, reducing carbon buildup but increasing NOx—hence reliance on a three-way catalyst. Pre-2005 engines should be inspected for cam wear per TSB 04-09-12.
Oil Specs: Requires Ford WSS-M2C913-B (5W-30) specification (Ford TSB 04-09-12). Equivalent to ACEA A5/B5.
Emissions: Euro 4 certification applies to all NA2A engines (2002–2008) (VCA Type Approval #VCA/EMS/9321). No Euro 3 or Euro 5 variants exist.
Power Ratings: Measured under ISO 1585 standards. Output consistent across all model applications (Ford TIS Doc. F-2045).
Ford Technical Information System (TIS): Docs F-2045, F-2088, TSB 04-09-12
VCA Type Approval Database (VCA/EMS/9321)
ISO 1585: Road vehicles — Engine test code
The Ford NA2A was used across Ford's B‑platform with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Streetka and modified intake manifolds in the Fiesta Mk5—and from 2005 the facelifted Fiesta adopted updated engine management calibrations, creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Ford TIS F-2045). The 7th VIN digit for NA2A-equipped vehicles is typically 'A'. Visual identification: black plastic rocker cover with '1.3' embossed; no variable valve timing hardware. Critical differentiation from Duratec 8v: NA2A uses SOHC with 2 spark plugs per cylinder bank visible externally, whereas Duratec is DOHC. ECU part number must match vehicle application—Fiesta and Streetka units differ in idle control strategy per TSB 04-09-12.
The NA2A's primary reliability risk is exhaust camshaft lobe wear in pre-2005 builds, with elevated incidence in sustained high-load or hot-climate use. Ford internal field data (2006) indicated cam wear in approximately 10% of units exceeding 100,000 km, while UK DVSA MOT records show low failure rates for emissions due to robust catalyst design. Extended oil intervals and low-quality oil increase cam stress, making correct oil specification and change frequency critical.
Analysis derived from Ford technical bulletins (2004–2008) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD NA2A.
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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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