BMW Z3 E36 1.8i 316i 318i M43 Throttle Body Housing Assy Petrol Engine 1247594

BMW Z3 E36 1.8i 316i 318i M43 Throttle Body Housing Assy is an original BMW intake system component designed for M43 series petrol engines. This used throttle body from this series allows for an economical yet technically sound repair or replacement of the engine's air intake control component.

Specifications and technical data

• SKU: 1247594
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1247594
• Substitutable numbers: 13541247594, 1247594
• Fuel type: Petrol
• Category: Throttle Bodies

Purpose and function in the intake system

The throttle body in a petrol engine is responsible for the precise metering of air drawn into the intake manifold, thereby influencing idle stability, throttle response, and the overall performance of the power unit. For M43 engines fitted in BMW Z3 E36, 316i, and 318i models, a properly functioning throttle body is crucial for maintaining factory engine performance parameters and ensuring correct interaction with the control system.

The offered item comes from the Throttle Bodies group and is dedicated to petrol-powered engines, ensuring compatibility with the operating characteristics of BMW petrol units of this generation.

Benefits of using an original BMW throttle body

Using an original BMW throttle body instead of a worn or damaged component allows for the preservation of factory mixture control parameters. In practice, this translates into:

• more stable idle and reduced RPM fluctuations,
• more predictable throttle response,
• better compatibility with the factory engine control unit (ECU),
• reduced risk of intake system-related error codes.

For users who want to keep their car in a configuration close to factory specifications, a used BMW throttle body represents a reasonable compromise between cost and maintaining proper engine performance.

Selection and compatibility with M43 engines

The throttle body has been designed to work with M43 petrol units used in BMW Z3 E36, 316i, and 318i models. This ensures the correct geometry of the intake channels and the proper opening characteristics, matched to the injection and ignition maps intended for these engines.

The component has a dedicated OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific engine version and vehicle year. When selecting, it is worth comparing the markings with the currently installed throttle body or using the BMW parts catalog to confirm full compatibility.

Condition of the component and practical service application

The offered throttle body is a used original component, which in service practice often means better fitment and compliance with factory parameters than many low-budget replacements. This type of part is suitable both for standard replacement of a worn component and for restoring engine efficiency after issues with unstable idle or intake system-related errors.

Due to the nature of the throttle body's operation in a petrol engine, a standard service procedure is recommended before installation, including checking sockets, electrical connectors, and – if necessary – adaptation in the engine control unit in accordance with the procedure provided for the specific BMW model.

Expanding the BMW intake system – related components

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as additional housings, control elements, or supplementary throttle bodies, check the available parts in the BMW Throttle Bodies category.

For drivers interested in a broader approach to drivetrain maintenance – including proper diagnostics of components working with the engine – a guide article discussing the selection and assessment of key components may be helpful, available here: Clutch and dual-mass flywheel – diagnostics and selection of drivetrain parts.