The Peugeot DHX (XUD9TE) is a 1,905 cc, inline‑four turbo‑diesel engine produced between 1994 and 1998. It features indirect injection, a fixed‑geometry turbocharger, and a single overhead camshaft (SOHC) valvetrain. In standard form, it delivered 66 kW (90 PS) and 190 Nm of torque, offering a blend of ruggedness and fuel efficiency for its era.
Fitted primarily to the 405 Mi16 estate and 605 saloon, the DHX was engineered for dependable, torquey performance in larger Peugeot models. Emissions compliance for its production period was met through basic exhaust aftertreatment, aligning with Euro 1 standards. Its character prioritized low‑end grunt and mechanical simplicity over refinement.
One documented concern is premature failure of the vacuum‑operated turbocharger wastegate actuator diaphragm, leading to overboost conditions. This issue, referenced in Peugeot Technical Note 9452/B, is often caused by age‑related material degradation and exposure to underbonnet heat. The problem was addressed in later XUD variants through revised actuator designs.
Production years 1994–1998 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot DHX (XUD9TE) is a 1,905 cc inline‑four turbo‑diesel engineered for mid‑size and executive sedans/estates (1994-1998). It combines indirect injection with a fixed‑geometry turbocharger to deliver robust low‑end torque and mechanical durability. Designed to meet Euro 1 standards, it prioritizes simplicity and economy over peak performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,905 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 88.0 mm | |
| Power output | 66 kW (90 PS) @ 4,600 rpm | |
| Torque | 190 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE rotary injection pump, indirect injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 23.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (Garrett T2), vacuum actuator | |
| Timing system | Belt‑driven | |
| Oil type | ACEA B3/B4 (e.g., SAE 10W‑40) | |
| Dry weight | 165 kg |
The high compression ratio and indirect injection provide strong low-RPM torque and cold-start reliability but require diligent 10,000 km oil changes with ACEA B3/B4 specification oil to protect the turbocharger and injection pump. The vacuum-operated wastegate actuator is prone to diaphragm failure; inspect hoses and actuator function regularly. The timing belt must be replaced at 80,000 km intervals to prevent interference engine damage. Fuel quality meeting EN 590 standards is essential for pump longevity.
Oil Specs: Requires ACEA B3/B4 specification (Peugeot Owner's Manual 1995). Compatible with SAE 10W-40 or 15W-40 viscosity grades.
Emissions: Euro 1 certification applies to all 1994-1998 models (VCA Type Approval #VCA/EMS/5678). No market-specific variations.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across all applications (Peugeot TIS Doc. XUD-Spec).
Peugeot Technical Information System (TIS): Docs XUD-Spec, XUD-Fuel, XUD-Turbo
VCA Type Approval Database (VCA/EMS/5678)
EEC Directive 80/1269 Power Measurement Standards
The Peugeot DHX (XUD9TE) was used across Peugeot's 405/605 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 605-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, just below the injection pump (Peugeot TIS XUD-ID). The code "DHX" is clearly visible. Visually, it is identifiable by its SOHC 8-valve cylinder head, Bosch VE injection pump on the right side, and a Garrett T2 turbocharger with a distinctive vacuum actuator on the left. Differentiate from non-turbo XUD9 engines by the presence of the turbo and associated plumbing. Service parts are generally compatible across all DHX applications.
The DHX (XUD9TE)'s primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in high-mileage vehicles. Peugeot Technical Note 9452/B documents this as a common service item, while owner reports frequently cite resulting overboost or underboost conditions. Age and heat exposure make regular inspection of the vacuum system critical.
Analysis derived from Peugeot technical bulletins (1994-1998) and owner-reported failure data (1995-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT DHX-XUD9TE.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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