BMW 5 7 X5 Series E38 E39 E53 M62 Engine Manifold Secondary Air Line 1433344

BMW 5 7 X5 Series E38 E39 E53 M62 Engine Manifold Secondary Air Line is an original intake system component designed for the 5, 7, and X5 series models of the E38, E39, and E53 generations. Engineered by BMW for precise integration with the M62 engine, it supports the proper operation of the secondary air system, which translates into stable engine performance and compliance with exhaust emission requirements.

Specifications and technical data

• SKU: 1433344
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1433344
• Substitutable numbers: 1433344, 11721433344, PK
• Category: Other Air & Fuel Delivery

Purpose and function in the M62 engine

The secondary air line for the M62 engine manifold is responsible for directing air to the appropriate channels in the exhaust-intake system during the engine's start-up and warm-up phases. In BMW 5, 7, and X5 series vehicles of the E38, E39, and E53 generations, this component works with the factory control system, ensuring:

• proper secondary air dosing to the manifold,
• stabilization of engine operation during cold starts,
• maintenance of exhaust emission parameters at the levels specified by the manufacturer.

Thanks to a design consistent with factory specifications, the system maintains proper sealing and flow, which is crucial for the diagnostics and operation of the M62 unit.

Original origin and BMW fitment

The offered secondary air line is a BMW OE group component, which means it retains factory geometry, connection diameters, and mounting points. In practice, this translates into:

• a secure fit to the manifold and other secondary air system components,
• compatibility with standard brackets and cable routing in the engine bay,
• easier installation without the need for modifications or adjustments required by aftermarket replacements.

This solution is particularly beneficial when servicing BMW E38, E39, and E53 models, where maintaining the original engine bay architecture facilitates subsequent maintenance and diagnostics.

Condition, service application, and benefits of replacement

The item comes from a used vehicle, making it an attractive cost-effective alternative to new parts while maintaining the manufacturer's original specifications. Replacing a worn or leaking secondary air line is recommended in situations such as:

• engine control unit errors related to the secondary air system,
• cold start issues or rough engine operation after ignition,
• leaks in the vicinity of the manifold and air supply lines.

Using an original component helps restore correct flow parameters, which promotes stable M62 engine operation and facilitates further diagnostics of potential faults.

Integration with other engine system components

The manifold secondary air line works in conjunction with other intake and exhaust system components, so its condition affects the overall performance of the engine area. In BMW 5, 7, and X5 series vehicles with the M62 unit, a properly functioning secondary air system supports:

• efficient catalytic converter warm-up,
• emission reduction during the start-up phase,
• correct sensor readings within the engine management system.

Choosing an original line is particularly important during comprehensive engine area maintenance, especially when other intake or exhaust system components are being serviced simultaneously.

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 hoses, connectors, or small mounting components, check out the available parts in the Other BMW category.

Technical support and project development

When planning modifications or servicing high-output units, it is worth considering the impact of the intake and exhaust system on engine durability and braking efficiency. To compare design solutions used in sports variants of other brands, you can use our comparative material on high-performance units: Audi RS vs other models – what is hidden under the hood and chassis?.