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Bmw 318Is Secondary Air Injection Pump Mounts

Bmw 318Is Secondary air injection pump mounts

Starting at $24.95, AutoBuffy stocks 1 secondary air injection pump mounts from URO. This bracket secures the air injection pump to the engine block or chassis, absorbing vibration and holding the pump in precise alignment. When the mount cracks or collapses, the pump shifts, stresses its hoses and electrical connections, and can trigger emissions faults that put your Bmw 318Is into a failed smog check.

Signs your Bmw 318Is needs a new secondary air injection pump mount

  • Check Engine light on with stored codes P0410, P0411, or related secondary air system fault codes
  • Audible rattling or knocking from the engine bay at startup, especially during cold-start warm-up cycles when the pump runs hardest
  • Visible cracking, splitting, or total collapse of the rubber isolator portion of the mount bracket
  • Secondary air injection pump contacts nearby components such as the valve cover or intake manifold due to bracket looseness or failure
  • Broken, kinked, or prematurely worn air injection hoses traced back to excessive pump movement caused by a failed mount
  • Failed state emissions inspection attributable to secondary air system not functioning within spec, with no other obvious pump or valve fault

Which secondary air injection pump mount should you buy for your Bmw 318Is?

The main decision is whether to choose an OE-equivalent bracket with rubber isolator intact, a solid metal replacement without an isolator, or a complete kit that includes hardware. Material quality and isolator durometer matter most here — a mount that is too rigid transfers damaging vibration to the pump, while one that is too soft allows misalignment.

OE-equivalent replacement mount
Best for
Daily drivers and emissions-tested vehicles needing a direct factory fit
What you get
Stamped or cast bracket with matched rubber isolator, correct bolt pattern, and proper pump alignment out of the box
Heavy-duty metal bracket (solid, no isolator)
Best for
High-mileage vehicles where the isolator has repeatedly failed or off-road use with frequent vibration
What you get
Increased rigidity and longevity of the bracket itself; requires attention to pump vibration being transferred to surrounding components
Mount and hardware kit
Best for
Complete repairs or vehicles with corroded or stripped mounting hardware
What you get
Replacement bracket plus all necessary bolts, nuts, and washers to avoid a separate hardware sourcing trip
OEM dealer bracket
Best for
Owners wanting exact factory specifications and finish, especially on newer vehicles still near warranty
What you get
Guaranteed fitment and materials matching original equipment, typically at a higher price point than aftermarket alternatives

Secondary air injection pump mounts brands we stock for your Bmw 318Is

URO
1 option · from $24.95

Replacing the secondary air injection pump mount on a Bmw 318Is

Moderate⏱ 1–2 hoursSocket set with extensionsCombination wrench setTorque wrenchPenetrating oil (for corroded fasteners)Trim or hose pick (for disconnecting hoses without tearing)

Access the secondary air injection pump by removing any engine covers or intake components that block the work area, then disconnect the pump's hose and electrical connector before unbolting the old mount. Transfer or discard the mount and install the new bracket, snugging all fasteners in sequence before torquing to the manufacturer's specification for your engine. Reconnect the pump's hose and harness, clear any stored fault codes with a scan tool, and run the engine through a cold-start cycle to confirm the system operates without returning codes.

Frequently asked questions

How much does it cost to replace secondary air injection pump mounts on a Bmw 318Is?
Parts start at $24.95 on AutoBuffy. The mount itself is relatively inexpensive, but total repair cost rises if labor is needed, since accessing the pump can require removing intake components on some engines. Budget additional time and cost if corroded hardware must be extracted or if related hoses need replacement at the same visit.
Will a broken secondary air injection pump mount cause a check engine light on a Bmw 318Is?
Yes, indirectly. A failed mount lets the pump shift out of position, stressing its hoses and electrical connector. This disrupts airflow through the secondary air system, and the ECM detects the flow anomaly and sets a fault code — typically in the P0410–P0418 range — triggering the Check Engine light.
Can I drive my Bmw 318Is with a damaged secondary air injection pump mount?
Short distances are possible, but it is not advisable. An unsupported pump vibrates excessively, accelerating wear on its internal bearings and stressing the connected hoses and wiring harness. Continued driving risks turning a simple bracket replacement into a much costlier pump or wiring repair.
Is the secondary air injection pump mount the same as the pump bracket on a Bmw 318Is?
They are often the same component. 'Mount' and 'bracket' are used interchangeably for the hardware that fastens the pump to the engine. Some applications use a two-piece setup — a rigid bracket bolted to the block and a separate rubber isolator bushing — so confirm which piece has failed before ordering.
How long does a secondary air injection pump mount last on a Bmw 318Is?
The steel or cast bracket itself can last the life of the vehicle, but the rubber isolator bonded to it degrades over time from heat cycling and oil exposure. Expect the isolator to show wear after many years of use. Vehicles in hot climates or with oil leaks nearby tend to see faster rubber deterioration.
Do I need to replace any other parts when replacing the secondary air injection pump mount on a Bmw 318Is?
Inspect the air injection pump hoses and the electrical connector at the same time. A failed mount often damages these components through excessive movement. If mounting hardware shows corrosion or thread damage, replace it as well. Addressing related wear items during the same repair avoids a repeat visit for the same system.

Shop secondary air injection pump mounts by year for the Bmw 318Is

19971996

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