The Peugeot HFY (TU1JP) is a 1,124 cc, inline‑three naturally aspirated petrol engine produced between 1996 and 2005. It features an aluminium alloy block and head with a single overhead camshaft (SOHC) and two valves per cylinder. This engine, part of PSA's compact TU family, was designed for economy and urban drivability, delivering modest power with low running costs.
Fitted primarily to the Peugeot 106 and Citroën Saxo city cars, the HFY was engineered for responsive low-speed performance and fuel efficiency. Emissions compliance for its production period was managed through multi-point fuel injection and a catalytic converter, meeting Euro 2 standards for its primary market.
One documented concern is premature wear of the camshaft and follower buckets, leading to a characteristic tapping noise. This issue, referenced in PSA service documentation, is often linked to infrequent oil changes or the use of incorrect oil viscosity. Later production runs incorporated revised heat treatment for the camshaft lobes.
Production years 1996–2005 meet Euro 2 standards for passenger vehicles (UTAC Type Approval).
The Peugeot HFY (TU1JP) is a 1,124 cc inline‑three naturally aspirated petrol engine engineered for city cars and superminis (1996-2005). It combines multi-point fuel injection with a simple SOHC 6-valve cylinder head to deliver frugal performance and easy maintenance. Designed to meet Euro 2 emissions standards, it prioritized low cost and reliability for high-mileage urban use.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,124 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑3, SOHC, 6‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 72.0 mm × 69.0 mm | |
| Power output | 44 kW (60 PS) @ 5,500 rpm | |
| Torque | 98 Nm @ 3,000 rpm | |
| Fuel system | Multi-point fuel injection (Magneti Marelli IAW) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires 90,000 km/6 yr replacement) | |
| Oil type | 10W-40 mineral or semi-synthetic | |
| Dry weight | Not available in public OEM docs |
The simple SOHC design offers good reliability but is sensitive to oil quality and change intervals. Using the specified 10W-40 oil is essential to prevent accelerated camshaft and follower wear. The timing belt is critical; while not an interference engine, a broken belt will strand the vehicle. The Magneti Marelli injection system is generally robust but requires clean fuel and functioning sensors. Neglecting oil changes is the primary cause of the documented camshaft wear issue.
Oil Specs: Requires 10W-40 mineral or semi-synthetic specification (PSA Service Manual 9615). Modern ACEA A3/B3 10W-40 is an acceptable equivalent.
Emissions: Certified to Euro 2 standards for all production years (UTAC Type Approval).
Power Ratings: Measured under DIN 70020 standards (PSA Group PT-2000). Output is consistent across verified applications.
PSA Service Manual 9615 (TU Engine Family)
PSA Technical Bulletin TB 9615/01
UTAC (Union Technique de l'Automobile) Type Approval Archives
PSA Group Powertrain Specifications (PT-2000)
The Peugeot HFY (TU1JP) was used primarily in Peugeot's entry-level city cars with transverse mounting. This engine was the base petrol unit for the second-generation 106 and was also fitted to the equivalent Citroën Saxo. All adaptations are documented in OEM technical bulletins.
The engine code "HFY" or "TU1JP" is typically stamped on a flat pad on the front face of the cylinder block, below the exhaust manifold. The 8th digit of the VIN for a Peugeot 106 with this engine is often 'F'. Key visual identifiers include the black plastic cam cover with "1.1" and the absence of a distributor (coil-on-plug ignition). Critical differentiation from the larger TU3 (1.4L): The HFY has a shorter engine block and a 3-cylinder exhaust manifold, while the TU3 is a 4-cylinder.
The HFY's primary reliability risk is camshaft and follower wear, directly linked to poor maintenance practices. PSA service data indicates this was a frequent cause of warranty claims in high-mileage urban vehicles, while owner club records show it is almost entirely preventable with correct oil and timely changes. Neglecting the 90,000 km timing belt interval, while less catastrophic than on interference engines, remains a common cause of breakdowns.
Analysis derived from PSA technical bulletins (1996-2005) and aggregated data from Peugeot/Citroën owner club technical forums. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT HFY-TU1JP.
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.
