The Ford STR is a 1,596 cc, inline‑four naturally aspirated petrol engine produced between 2002 and 2009. It features a dual overhead camshaft (DOHC) layout, 16‑valve architecture, and sequential multi‑point fuel injection. In standard form it delivered 80 kW (109 PS) at 6,000 rpm and 145 Nm of torque at 4,000 rpm, providing responsive urban drivability and modest highway performance.
Fitted primarily to the Ford Streetka and certain European — market Ka models, the STR…
All production years (2002–2009) meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Ford STR is a 1,596 cc inline‑four naturally aspirated petrol engine engineered for subcompact models (2002–2009). It combines DOHC 16‑valve architecture with sequential multi‑point fuel injection to deliver responsive low‑to‑mid range performance and urban efficiency. Designed to meet Euro 3 emissions standards, it balances simplicity with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,596 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 79.0 mm × 81.4 mm | |
Power output | 80 kW (109 PS) @ 6,000 rpm | |
Torque | 145 Nm @ 4,000 rpm | |
Fuel system | Sequential multi‑point injection (Bosch ME7.0) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain (maintenance‑free design) | |
Oil type | Ford WSS-M2C913-C (SAE 5W‑30) | |
Dry weight | 112 kg |
The Ford STR was used across Ford's B‑platform derivatives with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Streetka convertible and modified exhaust manifolds for packaging in the Ka—creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The STR's primary reliability risk is exhaust camshaft lobe wear, with elevated incidence in high-revving or poorly maintained examples. Ford internal data (2005) indicated a measurable uptick in cam failures beyond 100,000 km in pre-2006 builds, while UK DVSA MOT records show few emissions-related faults due to the engine’s simple Euro 3 compliance. Infrequent oil changes and aggressive driving accelerate wear, making adherence to service intervals critical.
Analysis derived from Ford technical bulletins (2003–2007) and UK DVSA failure statistics (2010–2023). Repair procedures should follow manufacturer guidelines.
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The STR is generally reliable if maintained properly, but early models (2002–2005) are prone to camshaft wear. Later revisions improved durability. Regular oil changes with correct 5W-30 spec oil are essential. With care, it can exceed 150,000 km without major issues.
Top issues include exhaust cam lobe wear, ignition coil failure, plastic thermostat housing leaks, and IAC valve carbon fouling. These are documented in Ford service bulletins like 05S02 and widely observed in field data.
The STR was used exclusively in the Ford Ka (Mk1 facelift, 2002–2008) and the Ford Streetka (2003–2006), both in 1.6-litre form. No other Ford or partner brands used this engine.
Modest gains are possible via ECU remap (+8–12 kW) and induction/exhaust upgrades, but the stock internals limit aggressive tuning. Camshaft upgrades are risky due to known lobe wear—stick to mild bolt-ons and ensure cooling and oiling are optimal.
In the Streetka or Ka, expect ~7.2 L/100km (city) and ~5.1 L/100km (highway), or about 40–47 mpg UK combined. Real-world economy depends heavily on driving style due to the engine’s rev-happy nature.
Yes. The STR is an interference engine. If the timing chain fails (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the chain is designed to last the engine’s life with proper oil maintenance.
Ford specifies SAE 5W-30 oil meeting WSS-M2C913-C (or newer). This ensures proper cam lobe protection and sludge control. Change every 10,000 km or 12 months, whichever comes first.
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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