035-133-554 VW & Audi Fuel Injector Bushing Insert - Golf, Jetta, 4000

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Fuel Injector Bushing Insert – 035-133-554 The 035-133-554 is a specialized injector bushing (also known as an injector insert or shroud) used in Volkswagen and Audi engines equipp ed with Bosch Continuous Injection Systems (CIS). Unlike the rubber O-ring that seals the injector, this rigid insert provides the structural seat for the injector within the intake manifold. It ensures the fuel injector remains perfectly centered and at the correct depth for an optimal spray pattern. Over hundreds of heat cycles, these plastic or phenolic inserts can become brittle, crack, or even fuse to the intake manifold. A cracked bushing is a major source of unmetered air leaks, which disrupts the delicate air-fuel balance required for CIS systems to idle and accelerate correctly. Replacing these during an injector service is highly recommended to restore factory-spec vacuum integrity and engine smoothness. Detailed Vehicle Compatibility Audi 200: 1989, 1990, 1991 Audi 200 Quattro: 1989, 1990, 1991 Audi 4000: 1987 Audi 4000 Quattro: 1984, 1985, 1986, 1987 Audi 5000: 1985, 1986, 1987, 1988 Audi 5000 Quattro: 1986, 1987, 1988 Audi Coupe: 1985, 1986, 1987 VW Cabriolet: 1985, 1986, 1987, 1988, 1989 VW Fox: 1987, 1988, 1989, 1990 VW Golf: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992 VW Jetta: 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992 VW Quantum: 1984, 1986, 1987, 1988 VW Scirocco: 1985, 1986, 1987, 1988 Product Highlights & Features Precise Injector Seating: Designed to the exact tolerances of the Bosch CIS injector body to prevent vibration and movement. Heat-Resistant Composite: Built to withstand the extreme temperatures of the cylinder head and intake manifold without warping. Vacuum Leak Prevention: Provides a smooth, non-porous surface for the injector O-ring to press against, ensuring an airtight seal. Direct OEM Fit: A genuine replacement for the original Audi/VW part number 035-133-554, maintaining the original engineering specs of the fuel rail assembly. Technical Specifications Part Number: 035-133-554 Component Type: Injector Shroud / Bushing Insert Material: Specialty High-Temp Plastic Application: CIS and CIS-E Fuel Injection Systems Installation & Maintenance Tips Removal Tool: These inserts can be difficult to remove if they are old and brittle. Using a large internal hex (Allen) wrench or a specialized injector seat tool can help unscrew them without stripping the plastic. Clean the Threads: Before installing the new 035-133-554 inserts, ensure the threads in the intake manifold are completely clear of old plastic fragments or carbon buildup. Replace the Seals: Always install new rubber injector O-rings when replacing these bushings. Putting old, flattened rubber into a new insert will likely result in a vacuum leak. Sealant Warning: Do not use RTV or silicone sealant on the threads of the insert unless specifically directed. Most are designed to seal via the precision of the threads and the accompanying O-ring. 035133554 Show more