Buy a Quality Used BMW M50 Engine for Your Vehicle

Looking for a used BMW M50 engine for sale for a replacement or restoration project? AllGoodParts supplies genuine used BMW M50 engines sourced from recycled vehicles, with options selected based on engine code, condition and vehicle application.

Our M50 range includes the M50B20, M50B20TU, M50B25 and M50B25TU, depending on current stock. Each used M50 engine is listed with its available condition, engine code, mileage information and included components wherever these details are known.

With years of experience supplying used automotive parts in Australia, we focus on genuine OEM components and straightforward service. Instead of assuming engines are interchangeable simply because they belong to the same M50 family, we can check your VIN, engine code and vehicle details to help identify the right BMW M50 motor for your vehicle.

BMW M50 Engine Specifications and Features

The M50 is a straight-six petrol engine family offered in different capacities and specifications. The exact specifications can vary by version and vehicle application.

Specification	Details
Engine family	BMW M50
Common variant	M50B25
Capacity	2.0L / 2.5L, depending on variant
Fuel type	Petrol
Configuration	Inline 6-cylinder
Aspiration	Naturally aspirated in standard factory applications
Horsepower	Varies by engine version and specification
Torque	Varies by engine version and specification
Condition	Used
Warranty	Up to 3 months / 5,000 km, whichever occurs first
Delivery	Australia-wide

The M50B25 for sale is one of the better-known M50 variants, but capacity alone should not be used to confirm interchangeability.

BMW M50 Engine Fitment & Compatibility

Choosing the right second-hand BMW engine requires more than matching the engine family. The BMW model, chassis, engine code, model year, transmission, wiring and other vehicle specifications can all affect whether an engine is a suitable replacement. The M50 was fitted to several BMW models from the factory and is also a popular choice for engine swaps, particularly in older BMW chassis.

Common BMW M50 engine applications may include:

BMW E36 – Factory-fitted to models such as the 325i.
BMW E34 – Used in selected E34 models with different specifications.
BMW E30 – A popular choice for engine conversion projects.
BMW E28 – Also used in some conversion builds.
M50B20 / M50B25 – Different capacities with different applications.
M50TU – VANOS versions with differences from earlier M50 engines.

Even when two engines share the M50 name, differences in ancillaries, electronics and installation requirements can affect compatibility. Providing your VIN, model, build year and existing engine code gives us the information needed to check the available engine and help you choose the right option.

BMW M50 Engine Reliability and Common Problems

The BMW M50 is a legendary inline-six engine with a strong reputation for reliability and long-term durability when properly maintained. Maintenance history, mileage, cooling-system condition and previous use can all influence engine lifespan.

Common areas to inspect on an older M50 include:

Cooling System Wear: Water pumps, thermostats and plastic cooling parts can fail with age.
Oil Leaks: Valve cover and other engine seals can become brittle and start leaking.
VANOS Issues: On M50TU engines, worn VANOS components may cause rough running or reduced performance.
Crankcase Ventilation: Age-related breather problems can contribute to rough idling or oil consumption.
Overheating: A neglected cooling system can lead to serious engine damage if overheating is not addressed quickly.

For a used engine, actual condition matters more than simply choosing an engine by family name. Where available, mileage and vehicle information can help assess the unit before purchase.

M50 Engine Price and Replacement Cost

The M50 engine price depends on the variant, mileage, condition, included components and current stock. A complete M50 engine for sale can also have a different price from an engine supplied without particular accessories or ancillaries.

Your total engine replacement cost may also include labour, fluids, seals, gaskets, freight and installation. Contact AllGoodParts for current availability and pricing based on your exact BMW details.

Warranty and Australia-Wide Delivery

AllGoodParts supplies quality used engines sourced from genuine recycled vehicles, with condition and mileage recorded where available. Eligible engines generally come with up to 3 months or 5,000 km warranty, whichever comes first, subject to the applicable warranty terms.

Engines are carefully prepared and securely packaged for transport, with Australia-wide delivery available. Orders are generally dispatched within 1 to 2 business days, with delivery usually taking around 2 to 7 business days, depending on the destination. Our team can also help check engine compatibility before you purchase.

Frequently Asked Questions

Quick answers to common questions about our used car parts and services.

Is the M50B25 a 2.5L engine? +

The M50B25 is the 2.5L member of the M50 family, although exact specifications can vary by application and version.

Can I buy a used M50 engine from AllGoodParts? +

Yes. AllGoodParts supplies used BMW engines subject to current stock, including M50-family engines where available.

Are M50 engines reliable? +

A well-maintained M50 can be durable, but the condition of a used engine, its mileage and maintenance history should be considered before purchase.

How do I check M50 engine compatibility? +

Provide your VIN, BMW model, build year and existing engine code. These details are more reliable than matching engine capacity alone.

How much does a BMW M50 engine cost? +

Price varies according to the M50 variant, condition, mileage, included components and availability. Contact AllGoodParts with your vehicle details for current pricing.