Genuine Secondary Air Injection Pump Hose

When a vehicle's secondary air injection system develops a leak, the culprit is often a hardened, cracked, or collapsed hose. Genuine secondary air injection pump hoses are original-equipment-style replacements, built to match the routing, diameter, and connection style that the vehicle's manufacturer specified. For owners who want a repair that behaves exactly like the original part, this is the appeal of choosing a genuine hose over a universal length of tubing.

What a Secondary Air Injection Pump Hose Does

The secondary air injection system pushes fresh air into the exhaust stream shortly after a cold start. The extra oxygen helps burn off unburned hydrocarbons while the catalytic converter is still warming up, which lowers cold-start emissions. The pump hose carries that air from the pump to the check valve, combi valve, or exhaust manifold or cylinder head passages. Because these hoses sit near hot exhaust components and are exposed to heat cycling, moisture, and vibration, they are a common wear item on higher-mileage vehicles.

Why Fit and Specification Matter

Unlike a generic hose, a vehicle-specific part has pre-formed bends, the correct inner diameter, and end fittings that seat properly on the pump and valve. A hose that is even slightly off can kink, rub against nearby components, or leak at the connection. Leaks in this circuit can reduce the system's effectiveness and may contribute to fault codes related to secondary air system flow or efficiency, which in turn can lead to a failed emissions inspection. Matching the original part number helps avoid these headaches.

Shopping Considerations

• Match the part number: Confirm the hose against your vehicle's year, engine, and the original part number, since pump-to-valve and inlet hoses are often different parts.
• Inspect connected parts: If a hose has failed, check the secondary air pump, check valve, and any connector pipes for moisture damage or blockage.
• Check clamps and fittings: Replace worn clamps or seals at the same time so the new hose seals correctly.
• Consider heat exposure: Hoses routed near the exhaust deserve a careful look for heat damage when the system is opened up.

Explore More from Genuine

This page focuses on Genuine's selection of secondary air injection pump hoses, a compact range suited to owners and technicians who prefer OE-style parts for emissions repairs. To see everything offered under this name, visit the full Genuine brand page. If you want to compare options from other manufacturers, browse the complete Secondary Air Injection Pump Hose category for additional fitments and styles.

Whether you are addressing a cracked hose after an emissions warning or performing preventive maintenance on an aging air injection system, choosing a hose built to original specifications is a straightforward way to keep the system sealed and working as designed.