Used Truck Complete Engines & OEM Engine Assemblies

Used truck complete engines & engine assemblies

Complete diesel engines are the heart of any heavy truck. They generate the power that moves the vehicle, drive key ancillaries such as compressors and power steering pumps, and must meet strict Euro emissions standards. When an engine fails or suffers damage, a good used OEM replacement can often get a truck back on the road faster and more cost-effectively than a brand new unit.

In this category we offer used OEM complete truck engines and engine assemblies removed from complete donor vehicles. Typical examples include Euro 5 and Euro 6 engines for Volvo FH/FM, MAN TGX/TGS, DAF XF/XG, Mercedes-Benz Actros/Arocs and other popular European HGVs. Each engine is listed with OEM numbers and donor vehicle details so you can match it to your own truck.

What you will find in the Complete Engines category

Stock in the Complete Engines category changes as new donor trucks arrive, but it typically includes:

• complete engines with block, head, sump and timing gear, often supplied with injection system and turbocharger as shown in the photos;
• engine assemblies sold “as removed” from the truck, including key ancillaries such as high-pressure fuel pump, fuel rail and inlet manifold;
• long and short blocks where the rotating assembly and cylinder head are supplied without external ancillaries;
• engine units with flywheel housing or clutch cover where these components remain attached during removal;
• engines prepared for core exchange programmes where applicable – see the product description and any notes about refundable core surcharges.

Each listing includes clear photos, OE/OEM part numbers where available and donor vehicle information (brand, model, year, Euro class and mileage), helping you compare engine code, power rating and layout with the engine fitted to your own truck.

Truck brands & engine families

Most complete engines in this category are taken from mainstream European heavy trucks, including:

• Volvo FH and FM long-distance and regional haulage tractors and rigids with D11, D13 and similar engine families;
• MAN TGS and TGX trucks with D20, D26 and other common MAN diesel engines in various power ratings;
• DAF XF and XG/XF106 tractors and rigids using MX11 and MX13 engines;
• Mercedes-Benz Actros and Arocs with OM470, OM471 and related engine ranges;
• selected engines from Scania, Iveco and Renault Trucks when suitable donor vehicles are available.

Because these are genuine OEM components removed from complete trucks, each engine is normally linked to a specific engine code, emission standard and power output, which is essential for achieving the correct fit and performance.

Why complete truck engines matter

Choosing the correct complete engine is critical for uptime, fuel efficiency and total running costs:

• reliability – an OEM engine built for the exact chassis and duty cycle is more likely to deliver long service life;
• performance & emissions – matching the right engine code and Euro class keeps the truck within legal emission limits and preserves factory performance;
• downtime & repair cost – swapping in a complete engine assembly can be faster than a full rebuild of a heavily damaged unit;
• fleet consistency – using the correct OEM engines helps fleets keep similar trucks aligned in terms of fuel maps, diagnostics and spare parts.

Typical reasons to replace a truck engine

Common reasons to order parts from the Complete Engines category include:

• catastrophic internal failure such as broken con-rod, seized crankshaft or dropped valve where rebuild is uneconomical;
• chronic low oil pressure or severe wear causing repeated faults and warning messages even after major repairs;
• overheating damage leading to cracked heads, warped blocks or repeated head-gasket failures;
• accident damage or fire affecting the engine and ancillaries;
• engine swaps and upgrades when changing power rating, emission class or replacing a non-original engine with the correct OEM unit.

How to choose the correct complete engine

To minimise fitting issues and ensure the right performance, please check the following details before ordering:

• truck brand, model and series – for example Volvo FH4, MAN TGX Euro 6, DAF XF106, Mercedes Actros MP4;
• engine code and family – such as D13K, D26, MX13, OM471, usually shown on the engine identification plate or sticker;
• Euro emission standard – Euro 5 vs Euro 6 engines are often not interchangeable without significant changes;
• power rating (hp / kW) – match the rated output to your existing truck specification and transmission;
• whether the engine is supplied bare or with ancillaries – check the photos and description to see if turbocharger, injectors, pumps and wiring are included;
• OEM part numbers and casting numbers – compare any references shown in the listing with the numbers on your original engine.

If you are unsure, you can contact us with your VIN or registration number and clear photos of the current engine and identification plate. Our team can help you confirm compatibility before you place an order. For step-by-step guidance on ordering and arranging delivery, see How to Order.

Used OEM engines from dismantled trucks

VRA Truckparts specialises in used OEM truck parts sourced from carefully selected donor vehicles. Trucks are inspected and documented before dismantling so that engines, gearboxes, axles and other assemblies can be assessed properly. During dismantling, our technicians remove engines, check housings and visible components for damage, and reject units that do not meet our standards.

Usable engines are drained of fluids, cleaned externally, labelled with engine codes and OEM references where available, and stored under cover in our warehouse ready for dispatch. To learn more about how we work and our approach to reuse and recycling, please visit Our Dismantling & Quality Process, Sustainability & Recycling and About VRA Truckparts.

Related engine, cooling & driveline categories

If you are repairing or upgrading the powertrain on your truck, you may also want to browse:

• Engines & Components – ancillary parts such as sumps, rocker covers, mounts and engine brackets;
• Engine Cooling – radiators, intercoolers, fans and shrouds to support your chosen engine;
• Air Intake & Fuel Delivery – intake pipes, air cleaners and fuel system parts;
• Exhaust & Emissions – DPF, SCR and exhaust components that work together with the engine to meet Euro standards;
• Transmission & Drivetrain – gearboxes, propshafts and related driveline parts that connect to the engine.

Core units, delivery & returns

Some complete engines may be supplied under a core exchange scheme with a refundable surcharge. Where this applies, the product page will clearly show the core deposit and basic conditions. Full details of how our core programme works are explained on the Core Units & Surcharge page.

Engines and long blocks are heavy components that are usually shipped on pallets with secured, weather-resistant packaging and tracked delivery across the UK and EU. Typical lead times and options are described in our buyer information pages such as How to Order. If you need to combine an engine with cooling, exhaust or driveline parts for the same vehicle, our team will be happy to help you build a complete order.