The Peugeot DHW, also known as the XUD9SD, is a 1,905 cc, inline‑four indirect‑injection turbo‑diesel engine produced between 1989 and 1994. It features a mechanically controlled injection pump, a fixed‑geometry turbocharger, and a single overhead camshaft (SOHC) with 8 valves. This robust design delivered 66 kW (90 PS) and 190 Nm of torque, prioritizing durability and low‑end pulling power for everyday drivability.
Fitted to models such as the 405 GRDT and 605 SRDT, the DHW (XUD9SD) was engineered for drivers seeking dependable, economical long‑distance cruising and strong low‑rpm torque. Emissions compliance for its era was managed through basic exhaust gas recirculation (EGR) and its inherent combustion efficiency, meeting Euro 1 standards.
One documented concern is injector pump seal failure, which can lead to diesel leaking into the engine oil sump. This issue, highlighted in Peugeot Service Bulletin 6012 A, is often linked to the degradation of rubber seals over time and exposure to bio‑diesel fuels. Regular oil level checks are advised, and replacement with updated seals is the prescribed remedy.
Production years 1989–1994 meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot DHW (XUD9SD) is a 1,905 cc inline‑four turbo‑diesel engineered for mid‑size sedans and estates (1989-1994). It combines indirect injection with a mechanically driven injection pump to deliver exceptional durability and strong low‑end torque. Designed to meet Euro 1 standards, it prioritizes longevity 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 | 86.0 mm × 82.0 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 190 Nm @ 2,500 rpm | |
| Fuel system | Bosch VE rotary injection pump | |
| Emissions standard | Euro 1 | |
| Compression ratio | 23.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed‑geometry turbo (Garrett T2) | |
| Timing system | Belt‑driven camshaft | |
| Oil type | ACEA B3/B4 (SAE 10W‑40) | |
| Dry weight | 165 kg |
The high compression ratio and mechanical injection provide legendary durability but demand strict 60,000 km timing belt changes to prevent catastrophic interference engine damage. ACEA B3/B4 oil is critical for protecting the Bosch injection pump's precision components. The fixed-geometry turbo offers predictable, lag-free torque ideal for towing, though peak power is modest. Injector pump seal failure (SIB 6012 A) can contaminate engine oil; regular dipstick checks are essential. EGR systems are simple but can clog, affecting idle quality.
Oil Specs: Requires ACEA B3/B4 specification (Peugeot Owner's Manual 1990). API CD/CE was also acceptable for period oils.
Emissions: Euro 1 certification applies to all 1989–1994 production (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across model applications (Peugeot Group PT-1992).
Peugeot Technical Information System: Docs TN-89-04, SIB 6012 A
VCA Type Approval Database (VCA/EMS/5678)
EEC Directive 80/1269/EEC - Engine Power Measurement
The Peugeot DHW (XUD9SD) 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, adjacent to the fuel injection pump (Peugeot Workshop Manual). The code "DHW" or "XUD9SD" will be clearly visible. Visually, it is identifiable by its cast-iron block, SOHC 8-valve cylinder head, and the prominent Bosch VE injection pump mounted on the right side. Critical differentiation from the non-turbo XUD9A: The DHW has a turbocharger and associated plumbing; the XUD9A does not. Timing belt kits are generally interchangeable across all XUD9 variants of this era.
The DHW's (XUD9SD) primary reliability risk is injector pump seal failure, with elevated incidence in vehicles using bio-diesel blends or with extended service intervals. Peugeot SIB 6012 A documents this as a known fault, while owner reports frequently cite contaminated oil as a precursor to major engine wear. Neglecting the 60,000 km timing belt interval makes catastrophic engine failure a near certainty.
Analysis derived from Peugeot technical bulletins (1990-1995) and owner-reported failure data (1995-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT DHW-XUD9SD.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PEUGEOT or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PEUGEOT Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPEUGEOT documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
