The Peugeot N9TE is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2004 and 2010. It features a DOHC 16‑valve design with common‑rail direct injection and a variable geometry turbocharger (VGT), delivering a blend of performance and efficiency. In standard form it produced 100 kW (136 PS) and 320 Nm of torque, with its VGT enabling strong low‑end response for flexible driving.
Fitted to models such as the 307, 407, and Partner Tepee, the N9TE was engineered f…
Production years 2004–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/4567).
The Peugeot N9TE is a 1,997 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2004-2010). It combines common‑rail direct injection with a variable geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 4 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,997 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 88.0 mm | |
Power output | 100 kW (136 PS) @ 4,000 rpm | |
Torque | 320 Nm @ 2,000 rpm | |
Fuel system | Common-rail direct injection (Bosch CP3) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Variable geometry turbo (VGT) | |
Timing system | Chain‑driven | |
Oil type | Peugeot 9.55535‑S2 (SAE 5W‑30) | |
Dry weight | 160 kg |
The Peugeot N9TE was used across PSA Group's C/D-segment platforms with transverse mounting. This engine received platform-specific adaptations-unique engine mounts and intake routing for the 307 and 407-with no major facelift revisions affecting core compatibility. All adaptations are documented in OEM technical bulletins.
The N9TE's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using contaminated fuel or exceeding service intervals. Peugeot internal data indicates a notable failure rate before 120,000 km under these conditions, while owner reports frequently cite rough running and power loss as initial symptoms. Fuel quality and strict adherence to oil change schedules make preventative maintenance critical.
Analysis derived from Peugeot technical bulletins (2004-2010) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The N9TE is generally robust with proper care. Its main weakness is the high-pressure fuel pump, which is sensitive to poor fuel quality and infrequent oil changes. Using premium diesel and adhering to service schedules significantly improves longevity. The timing chain is designed to last the engine's life.
The most frequent issues are high-pressure fuel pump failures, DPF clogging from short trips, EGR valve clogging, and turbo actuator failures. These are covered in Peugeot service bulletins and are often linked to maintenance and fuel quality.
The N9TE was used in the Peugeot 307 (2004-2008), 407 (2004-2010), and Partner Tepee (2008-2010), specifically in the 2.0 HDi 136 variants. It was a popular engine for its balance of power and efficiency in these models.
Yes, the N9TE responds well to ECU remapping. Stage 1 tunes can safely increase power to around 160-170 PS and torque to 380-400 Nm. The stock internals and turbo are strong enough for these gains. Further modifications like an upgraded intercooler can yield more, but the fuel pump is often the limiting factor.
Official combined figures are around 5.5 L/100km (51 mpg UK). Real-world driving typically yields 6.5-7.5 L/100km (38-43 mpg UK) in mixed conditions. Fuel economy is very good for its performance, though it suffers if the DPF is clogged or on very short trips.
Yes. Like virtually all modern engines, the N9TE is an interference design. If the timing chain were to fail (which is rare), the pistons would collide with the valves, causing catastrophic internal engine damage. Fortunately, the chain is very durable.
Peugeot mandates a 5W-30 synthetic oil meeting the specific Peugeot 9.55535-S2 (or newer 9.55535-S3) standard. This low-SAPS (ash) oil is crucial for protecting the DPF. Using the correct oil is non-negotiable for engine and emissions system health.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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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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