043-133-241 VW Fuel Injection Intake Manifold Boot - Beetle, Super Beetle Each

Fuel Injection Intake Manifold Boot – 043-133-241

The 043-133-241 is a critical rubber intake coupling designed specifically for air-cooled Volkswagen engines equipped with L-Jetronic fuel injection. This boot connects the intake air distributor (the central plenum) to the intake manifold runners. Because fuel-injected engines rely on precise air measurement via the Air Flow Meter, any crack or leak in this boot allows "unmeasured" air to enter the engine.

This unmeasured air causes the engine to run lean, leading to symptoms such as a wandering idle, hesitation upon acceleration, and overheating. Over decades of use, the original rubber boots succumb to engine bay heat and fuel vapors, losing their flexibility and developing splits in the bellows. Replacing these boots is a mandatory step in restoring the drivability of a fuel-injected Beetle or Bus.

Detailed Vehicle Compatibility

VW Beetle:

• 1975, 1976, 1977

VW Super Beetle:

• 1975, 1976, 1977, 1978, 1979

Product Highlights & Features

• Air-Tight Seal: Restores the vacuum integrity of the fuel induction system, ensuring accurate fuel delivery.

• Flexible Bellows Design: Accommodates the natural vibration and thermal expansion of the engine without stressing the metal intake components.

• Heat-Resistant Elastomer: Manufactured from a durable rubber compound designed to withstand the high-temperature environment of an air-cooled engine bay.

• Direct OE Replacement: Molded to factory specifications for a perfect slide-on fit over the manifold and plenum flanges.

Technical Specifications

• Part Number: 043-133-241

• Material: High-Temperature Rubber

• Quantity Per Engine: 2 (Sold Individually)

Installation & Maintenance Tips

• Clamp Inspection: Always use the correct size hose clamps to ensure even pressure around the circumference of the boot. Do not over-tighten, as this can cut into the new rubber.

• The "Soap Trick": If the boot is difficult to slide onto the aluminum manifold, apply a small amount of soapy water to the inside edge. Avoid petroleum-based lubricants which can rot the rubber.

• Visual Check: During routine oil changes, inspect the folds of the bellows. Often, cracks are hidden inside the ribs and only open up when the engine twists under torque.

• Plenum Alignment: Ensure the intake plenum is properly supported by its brackets; if the plenum is sagging, it puts constant tension on the 043-133-241 boots, causing them to fail prematurely.

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