Professionally Tested Mercedes Om651 Engines With Warranty

Buy a Used OM651 Engine for Your Mercedes-Benz

If your Mercedes-Benz has a worn-out or damaged diesel engine, replacing it with a quality used unit can save you time and help get your vehicle back on the road sooner. AllGoodParts supplies quality second-hand OM651 engines for a range of Mercedes-Benz cars, SUVs and commercial vehicles, providing a reliable option when your existing engine is no longer performing properly or requires replacement.

Choosing the right OM651 engine is important, as not every engine from the OM651 family will be suitable for every Mercedes-Benz vehicle. Engine code, capacity, vehicle model, production year, transmission and other specifications should be checked before purchasing.

We have a wide range of second-hand OM651 engines in our inventory, giving you more options to choose from based on your vehicle’s requirements. Providing your vehicle details can also help us identify the most suitable engine for your application.

Mercedes-Benz OM651 Engine Specifications and Features

The OM651 diesel engine was designed as a modern, efficient Mercedes-Benz 4-cylinder diesel engine, using common-rail direct injection and turbocharging. It was fitted to various Mercedes-Benz models, including versions with 1.8-litre and 2.1/2.2-litre diesel configurations, making the OM651 a widely used engine across the Mercedes-Benz range.

Specification	Details
Engine family	Mercedes-Benz OM651
Engine code	OM651
Configuration	Inline 4-cylinder
Fuel type	Diesel
Displacement	Approximately 1.8L or 2.1/2.2L, depending on variant
Fuel system	Common-rail direct injection
Turbocharging	Single or twin turbo, depending on variant
Valvetrain	DOHC
Timing drive	Timing chain
Power output	Approximately 95–204 hp, depending on application
Torque output	Approximately 250–500 Nm, depending on variant
Engine type	Used diesel engine
Emissions equipment	DPF/EGR; some applications include SCR/AdBlue
Common applications	A-Class, B-Class, C-Class, E-Class, CLA, GLA, GLK, Vito and Sprinter

Because OM651 specifications vary significantly between applications, these figures should be used as a guide rather than confirmation that every OM651 engine has the same specification.

Find the Right OM651 Engine for Your Mercedes-Benz

The Mercedes-Benz OM651 engine was used across a wide range of Mercedes-Benz passenger cars, SUVs and commercial vehicles. You can find the OM651 Mercedes engine in models including:

Mercedes-Benz A-Class – selected 1.8-litre and diesel variants
Mercedes-Benz B-Class – selected 1.8-litre and 2.1/2.2-litre models
Mercedes-Benz C-Class – various diesel configurations
Mercedes-Benz E-Class – selected 2.1/2.2-litre diesel models
Mercedes-Benz CLA – selected diesel variants
Mercedes-Benz GLA – selected diesel applications
Mercedes-Benz GLK – selected 2.1/2.2-litre diesel models
Mercedes-Benz Vito and Viano/V-Class – selected van and passenger applications
Mercedes-Benz Sprinter – selected commercial vehicle applications

Although these vehicles can share the OM651 engine family, this does not mean every OM651 engine is interchangeable. Differences in engine codes, power ratings, turbocharger configuration, engine orientation, mounting points, wiring, ECU requirements, injectors and ancillary components can affect whether an engine is a suitable replacement.

If you are unsure which Mercedes-Benz OM651 engine is right for your vehicle, send us your VIN, model, build year and engine details. We check the engine details you provide to help match your vehicle with a suitable used OM651 engine, reducing the risk of ordering the wrong motor.

What Makes the Mercedes-Benz OM651 Engine Reliable?

The Mercedes-Benz OM651 diesel engine is known for its efficient performance, strong torque delivery and dependable operation. Its four-cylinder diesel design combines common-rail direct injection with turbocharging to provide responsive acceleration while maintaining good fuel efficiency. This makes the OM651 well suited to both everyday driving and longer-distance travel.

With the right servicing, the OM651 engine can provide reliable performance over many kilometres. Regular oil and filter servicing, using the correct engine oil and keeping the cooling and fuel systems properly maintained, helps the engine operate smoothly and efficiently. Its strong low-end torque also makes it a practical choice for vehicles used for commuting, touring and carrying loads.

For customers considering a used OM651 Mercedes engine, maintenance history and overall engine condition are important when choosing a replacement. A quality-tested engine with suitable specifications can provide a cost-effective way to restore dependable performance to your Mercedes-Benz while retaining the efficiency and driving characteristics the OM651 is known for.

What to Know About Mercedes-Benz OM651 Engine Problems

Major engine problems are not necessarily common with the Mercedes-Benz OM651, but higher-mileage or poorly maintained engines can develop issues with components such as the timing chain, fuel injectors, cooling system and engine seals. Knowing these potential issues can help you make a more informed decision when buying a replacement engine.

Timing Chain and Tensioner Wear: The rear-mounted timing chain and tensioner can wear over time, sometimes causing a rattling noise during cold starts.
Injector Issues: Earlier OM651 engines can experience injector-related problems, which may cause hard starting, rough idling, misfires or unusual injector noise.
Oil and Coolant Leaks: Age-related wear to seals, gaskets and cooling-system components can result in oil or coolant leaks that should be checked before installation.
Turbocharger Wear: Higher-mileage engines may experience turbocharger wear, which can affect acceleration, power delivery and overall engine performance.

When repairs become expensive, a quality replacement can be a practical way to restore dependable performance. Our range of second-hand OM651 engines offers different specifications and mileages, helping you find an option that suits your Mercedes-Benz and budget.

Mercedes OM651 Engine Price & Replacement Cost

The OM651 engine price can vary depending on the engine’s condition, kilometres, engine variant, vehicle application and the components supplied with it. At AllGoodParts, our second-hand OM651 engines are assessed based on their specifications and condition, helping customers select a suitable replacement without paying for a brand-new motor.

When calculating the OM651 engine replacement cost, it is important to consider more than the purchase price of the engine. Installation may require labour for removing the existing engine and fitting the replacement, along with associated items such as fluids, filters, seals, gaskets and other components where required. Workshop labour charges can differ depending on the vehicle and the complexity of the installation.

If your Mercedes diesel engine needs replacing, we have quality used Mercedes engines for sale. Get in touch with our team and provide your vehicle model, year and engine details so we can help identify a compatible OM651 replacement for your Mercedes-Benz.

Warranty and Australia-Wide Delivery

Each used engine supplied by AllGoodParts is covered by a 3-month or 5,000 km warranty, whichever comes first, subject to the applicable warranty terms.

Warranty coverage does not replace the importance of correct installation, so the engine should be fitted by a qualified professional and installed according to the applicable requirements.

Once your order is confirmed, engines are professionally prepared and securely packaged for transport. We provide Australia-wide delivery, with orders generally dispatched within 1 to 3 business days and delivery typically taking around 2 to 7 business days depending on location and freight requirements.