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BMW Intake Manifold Components (DISA, Vacuum, CCV, Etc) for BMW E34 M5 S38 3.5L

The intake manifold takes incoming air from the intake and distributes it to each cylinder. Over the years the manifolds have gotten more sophisticated and complex. Most of the additional work that it does is emissions-related - recirculating vapors back into the engine to be re-used. But there are also performance innovations such as BMW's DISA variable intake runners. All of the modern innovations have a part behind it and here you will find replacement components.

In some BMW models there are performance improvements with intake manifolds. These intake manifold upgrades use mostly BMW parts and are a direct replacement for your stock manifold. We offer manifolds and kits to make the conversion work easier.

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Idle Air Control Valve (1)

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Vacuum Check Valve - E23 E24 E34 E36 E38 E39 E46 E52 E53 Z3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:36100155

Part#: 1168000378

In Stock

Sale - Save 35% $ 4.99

This product was last offered at the strikethrough price on
05-03-2026

$ 3.26 USD

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Qty

Sale - Save 35%

$ 4.99

This product was last offered at the strikethrough price on
05-03-2026

$ 3.26 USD

Add to Wish List

A damaged, leaking, or missing vacuum check valve can lead to a range of engine performance issues. As a critical component in the vehicle's vacuum system, the check valve ensures proper air flow and pressure regulation within various engine systems. If compromised, it can cause erratic idling, poor acceleration, or rough engine performance. Additionally, a malfunctioning vacuum check valve may trigger the check engine light and could cause your vehicle to fail an emissions test due to improper control of exhaust gases. Timely replacement of a faulty vacuum check valve is essential for maintaining engine efficiency, preventing further damage, and ensuring compliance with emissions regulations.

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3 Pin Connector

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:33412930

Part#: 12521706096

In Stock

Sale - Save 11% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 9.78 USD

Add to Wish List

Qty

Sale - Save 11%

$ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 9.78 USD

Add to Wish List

Includes connector housing with terminals and seals. Commonly used for the idle air control valve (IACV).

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521706096 - Commonly used for the idle air control valve (IACV).

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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BMW Intake Manifold Components (DISA, Vacuum, CCV, Etc) for BMW E34 M5 S38 3.5L

Sub-Categories

Vacuum Check Valve - E23 E24 E34 E36 E38 E39 E46 E52 E53 Z3

3 Pin Connector

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