The Peugeot UKZ (ZPJ4/Z) is a 1,587 cc, inline‑four naturally aspirated petrol engine produced between 2004 and 2010. It features double overhead camshafts (DOHC), 16 valves, and sequential multi-point fuel injection. In standard form, it delivered 80 kW (109 PS) and 145 Nm of torque, engineered for responsive, economical performance in compact vehicles.
Fitted to models such as the 207 and 308, the UKZ engine was designed for agile city driving and efficient motorway cruising. Emissions compliance was achieved through a three-way catalytic converter and electronic throttle control, meeting Euro 4 standards for its primary production run.
One documented concern is premature failure of the plastic intake manifold, which can crack and cause vacuum leaks, as noted in Peugeot Technical Note 7832. This issue is often linked to thermal stress and material fatigue over time. Later service parts incorporated a reinforced design to improve durability.
Production years 2004–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6789).
The Peugeot UKZ (ZPJ4/Z) is a 1,587 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks (2004-2010). It combines DOHC 16-valve architecture with sequential multi-point injection to deliver lively, fuel-efficient performance. Designed to meet Euro 4 standards, it prioritizes low running costs and urban agility.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,587 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 78.5 mm × 82.0 mm | |
| Power output | 80 kW (109 PS) @ 5,800 rpm | |
| Torque | 145 Nm @ 4,000 rpm | |
| Fuel system | Sequential multi-point injection (SAGEM) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | Peugeot 9736.10 (SAE 5W‑40) | |
| Dry weight | 112 kg |
The DOHC design offers lively, responsive power ideal for city driving but requires strict adherence to 60,000 km timing belt replacement intervals to prevent catastrophic engine damage. Peugeot 9736.10 (5W-40) oil is recommended. The plastic intake manifold is prone to cracking with age, leading to vacuum leaks and rough running; inspect during routine services. The engine is mechanically simple and robust with proper maintenance. Emissions system is basic, relying on the catalytic converter.
Oil Specs: Requires Peugeot 9736.10 specification (Peugeot Service Manual 7832). Equivalent to ACEA A3/B4.
Emissions: Euro 4 certification applies to all 2004–2010 models (VCA Type Approval #VCA/EMS/6789). No market-specific variations.
Power Ratings: Measured under ISO 1585 standards. Output is consistent across model applications (Peugeot Group PT-2007).
Peugeot Technical Information System: Docs 7832
VCA Type Approval Database (VCA/EMS/6789)
ISO 1585: Road vehicles — Engine test code — Net power
The Peugeot UKZ (ZPJ4/Z) was used across Peugeot's PF1/PF2 platforms with transverse mounting. This engine received minor ECU mapping adaptations for different model weights but no major facelift revisions affected core compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the front face of the cylinder block, near the gearbox flange (Peugeot TIS 7832). The 8th VIN digit typically corresponds to the engine code ('Z' for UKZ). Visually, it features a black plastic intake manifold and a prominent SAGEM-branded engine management module on the right side. Critical differentiation from the later EP6: UKZ (ZPJ4/Z) has a timing belt, while EP6 uses a timing chain. Service parts for the intake manifold are specific to post-2007 models due to the reinforcement update (Peugeot Technical Note 7832).
The UKZ's primary reliability risk is cracking of the plastic intake manifold, with elevated incidence in higher-mileage or older examples. Peugeot internal service data indicated a common failure point, while UK DVSA records show associated rough running as a frequent MOT advisory item. Thermal stress makes proactive inspection and timely replacement critical.
Analysis derived from Peugeot technical bulletins (2005-2009) and UK DVSA failure statistics (2012-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT UKZ-ZPJ4-Z.
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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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