BMW E34 E36 E46 Piston Connecting Rod Conrod Petrol 316i 318i 518i 7504422

BMW E34 E36 E46 Piston Connecting Rod Conrod Petrol 316i 318i 518i is an original part from the Connecting rods and parts group, designed for petrol engines of popular BMW 3 and 5 series models. This used OEM part ensures factory geometry, proper balance, and compatibility with the power units where the piston and connecting rod assembly transfers combustion forces to the crankshaft. This is a solution for users looking for a technically matched component for professional petrol engine repair.

Specifications and technical data

• SKU: 7504422
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7504422
• Substitutable numbers: 7504422, 1437617, 11241437617, 1743074, 11241743074, 1727115, 11241727115
• Fuel type: Petrol
• Part type: Connecting Rod
• Category: Connecting Rods & Parts

Purpose and compatibility with petrol engines

The presented piston and connecting rod assembly has been designed to work with BMW petrol engines, which is crucial for the correct selection of parts in the crank-piston system. The design meets the requirements of units used in 316i, 318i, and 518i models, where it is essential to maintain the correct compression ratio, mass of moving parts, and appropriate connecting rod stiffness.

The selection of a piston and connecting rod for a specific BMW petrol engine should always take into account the factory parameters of the power unit, such as cylinder bore, piston stroke, or operating characteristics within a given RPM range. Using an original element from the same engine family allows for maintaining structural consistency and reducing the risk of improper operation of the crank system.

Characteristics of the piston–connecting rod assembly

The piston–connecting rod system in a BMW petrol engine is responsible for converting the energy of the air-fuel mixture combustion into the rotational motion of the crankshaft. In practice, this means that this element operates under very demanding conditions: high rotational speeds, variable loads, and high temperatures. The use of a properly selected, original assembly allows for maintaining:

• stable engine operation across the full RPM range,
• proper balance of the crank-piston system,
• correct cooperation with bearings and the crankshaft,
• proper combustion chamber tightness while maintaining factory assembly clearances.

For the user, this means a lower risk of vibration, noise, and accelerated wear of other engine components. In the case of power unit repair, using a complete piston and connecting rod from the same engine family is a technically safe and predictable solution in terms of operation.

Benefits of using an original BMW element

Choosing an original component from the Connecting rods and parts group is important for both the durability and the operating culture of the power unit. A piston and connecting rod assembly sourced from BMW ensures:

• maintenance of factory manufacturing tolerances and fitment to the engine block,
• material consistency with other elements of the crank system,
• predictable behavior under high loads typical for petrol engines.

Thanks to this, engine repair in 316i, 318i, or 518i models can be carried out in a manner close to the manufacturer's service standards, which is particularly important for long-term vehicle operation. At the same time, the used OEM element allows for optimizing repair costs while maintaining a high level of technical fitment.

Professional selection and installation in the drivetrain

When replacing a piston and connecting rod in a BMW petrol engine, it is worth paying attention to the condition of other elements of the crank-piston system and the entire drivetrain. Proper installation requires checking clearances, alignment, and cooperation with the crankshaft and bearings, as well as proper preparation of the cylinder surface. In the case of more extensive work on the drive system, including the clutch or drivetrain components, a specialized guide may be helpful – detailed information can be found in the article Clutch and dual-mass flywheel – diagnostics and selection of parts for the drivetrain.

Expanding repairs within BMW Connecting rods and parts

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional connecting rods, fasteners, or cooperating components of the crank-piston system, check the available parts in the BMW Connecting rods and parts category.