BMW 1 3 Series e87 e90 118i 318i Complete Engine N46B20B New Timing WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

BMW 1 3 Series e87 e90 118i 318i Complete Engine N46B20B New Timing WARRANTY designed for the 1 Series E87 and 3 Series E90 models with 118i and 318i units is a functional solution for drivers looking for a proven petrol engine. This is a four-cylinder engine with a new timing system, prepared as a complete base for professional replacement in BMW vehicles. Thanks to its preserved factory configuration, it provides a solid foundation for restoring the full efficiency of the powertrain.

Specifications and technical data

• SKU: 0430936-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 430936
• Substitutable numbers: 11000430936, 0430936, 11000391994, 0391994, 11000430937, 0430937, 11000391995, 0391995, N46B20BY
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Application and compatibility

The offered engine is intended for BMW 1 Series E87 118i and BMW 3 Series E90 318i vehicles with the N46B20B unit. The design based on four cylinders and petrol power supply ensures performance characteristics typical for this generation of BMW engines – smooth power delivery and predictable response to load. Due to the preservation of the original architecture, the unit works well with the factory equipment and control systems in these models.

Construction and operating parameters

The N46B20B engine is a compact, inline four-cylinder unit designed to run on petrol. This configuration provides a favorable compromise between refinement, fuel consumption, and dynamics, especially in the lightweight bodies of the 1 and 3 Series. The timing system used has been replaced with a new one, which significantly reduces the risk of typical failures associated with a stretched chain or worn guide components.

The mileage of the unit is limited, which translates into less wear on moving parts and a better base for further operation. In practice, this means less stress on the crankshaft, pistons, bearings, and valve train compared to engines with significantly higher mileage.

Benefits of installing the complete N46B20B engine

Choosing a complete engine for the BMW E87/E90 allows you to shorten repair time and reduce the risk of problems with matching individual components. The unit with a new timing system provides:

• increased reliability of the timing system in the long term,
• reduced risk of costly failures associated with chain skipping,
• more stable operating parameters during start-up and under load,
• better conditions for proper adjustment and diagnostics.

Additionally, the use of an original unit from the N46 family facilitates integration with the vehicle's factory electronics, which is important for maintaining the correct operation of engine control systems and on-board diagnostics.

Condition, verification, and warranty

The engine comes from the segment of used BMW power units, which allows for a significant reduction in repair costs compared to purchasing a new unit, while maintaining a favorable price-to-functionality ratio. The new timing system and limited mileage are important advantages in terms of durability and operational safety.

The product is covered by a warranty, which additionally secures the investment in the engine replacement and allows for peace of mind when using the vehicle after installation. Before purchasing, it is worth verifying the compatibility of the unit with the specific equipment version and year of the car to ensure full compatibility with existing equipment.

Technical support and additional materials

Before deciding to replace the power unit in a BMW 3 Series E90, it is worth familiarizing yourself with the typical problems of these models. A detailed discussion of problematic units and potential repair costs can be found in the article: Troublesome BMW E90 engines – what can ruin your budget. This is a practical supplement to your knowledge when planning a major powertrain overhaul.

If you want to better understand why original, used powertrain components are often a reasonable choice in terms of safety and economy, the following material will be helpful: why used original OEM parts are a safe and cost-effective solution. This will allow you to consciously evaluate the advantages of installing a factory BMW unit instead of replacements of unknown origin.

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 blocks, cylinder heads, or complete long blocks, check the available parts in the BMW Engines category.