BMW Z4 E85 2.0i N46 150HP Bare Engine N46B20B New Timing 72k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

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

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

BMW Z4 E85 2.0i N46 150HP Bare Engine N46B20B New Timing 72k miles, WARRANTY is a complete powertrain unit from the N46 family, designed for the petrol version of the Z4 E85 roadster. The four-cylinder unit provides a balanced combination of performance and refinement, and the information about the new timing chain significantly increases its appeal for future, trouble-free operation. This is an ideal choice for users looking for a technically refined engine for replacement or repair of their BMW Z4.

Specifications and technical data

• SKU: 2151466-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2151466
• Substitutable numbers: 11002151466, 2151466, 11002151467, 2151467
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Technical characteristics of the N46B20B unit

The presented engine belongs to the Engines category and represents the N46 petrol family used in the BMW Z4 E85 2.0i model. The four-cylinder layout ensures a good balance between dynamics and fuel consumption, and the design based on modern BMW solutions allows for precise control of the combustion process. The unit is adapted for Petrol fuel, which in practice means the flexibility and quick throttle response typical of petrol engines.

The engine was designed as a load-bearing element of the entire powertrain, intended for operation in demanding road conditions. Four cylinders arranged in a row facilitate maintenance, ensure predictable thermal behavior, and provide good access to accessories in the BMW Z4 E85 engine bay.

New timing chain – operational benefits

A key advantage of this unit is the new timing chain, which is of significant importance for reliability in the case of N46 family engines. Replacing the timing components eliminates typical risks associated with chain, tensioner, and guide wear, thereby reducing the possibility of costly mechanical failures. For the user, this means a real extension of the trouble-free service life and a greater safety margin during intensive vehicle use.

The new timing chain also ensures more stable operating parameters across the entire rev range, better camshaft synchronization, and more reliable maintenance of factory settings. In practice, this translates into smooth idling, predictable acceleration, and proper cooperation with the engine control electronics.

Purpose, installation, and fitment

The N46B20B engine is dedicated to the BMW Z4 E85 2.0i and serves as a direct base for replacing the powertrain in this model. The four-cylinder petrol construction fits well with the character of a lightweight roadster, providing adequate flexibility and refinement in both city driving and on the highway. The unit is particularly attractive in situations where the existing engine has suffered serious mechanical damage or requires an uneconomical major overhaul.

Before installation, a standard preparatory procedure is recommended: verification of accessories, inspection of auxiliary system tightness, and matching the configuration to the specific vehicle equipment version. Thanks to maintaining the original specification, the engine works with the factory ECU and wiring, which facilitates integration with the existing electrical architecture of the car.

Condition, mileage, and practical application

The unit comes from the secondary market, which allows for optimizing repair costs compared to purchasing a brand-new engine. The mileage information allows for a better assessment of the operational potential, and the combination of a used block with a new timing chain represents a reasonable compromise between price and durability. Such a set is particularly interesting for workshops specializing in the BMW brand and for conscious users coordinating their car's repair themselves.

The four-cylinder petrol engine will perform well both in daily use and in more dynamic driving, typical for the Z4 model. It is a solution that allows restoring the vehicle's full performance while maintaining the engine refinement characteristic of BMW.

Additional technical information and materials

To facilitate selection and compatibility verification, the product specification includes data such as SKU, OEM part number, and reference numbers, marked with appropriate data-option attributes (including SKU, OEM part number, Reference numbers, Brand, Condition, Fuel type, Number of cylinders). This makes it easier to compare the offered engine with the unit factory-installed in the car.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as blocks, cylinder heads, or complete powertrain units, check the available parts in the BMW Engines category.

Before purchasing, it is also worth familiarizing yourself with practical experiences regarding BMW powertrains, especially in the context of typical faults and service costs. A good point of reference may be an article describing problematic engines in the E90 series – you can find it here: Troublesome BMW E90 engines: check what can ruin your budget!. This will allow you to better understand the specifics of BMW construction and consciously plan maintenance, even in the case of the Z4.