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Reliability-first replacement of the 993 non-turbo intake hose, with filter and adjacent intake inspection.
Plan
Parts
Gallery
Decisions & Unknowns
What I need to figure out:
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Verify the hose part number and final fitment against the VIN before ordering or opening the package.
Tasks
What I need to do:
Replace the aging non-turbo intake hose with Genuine Porsche 993 110 118 00, retain the stock airbox and dry paper filter, and confirm the intake is sealed with stable idle afterward.
Existing engine air-filter element — 993 110 327 01 (replace if dirty, damaged, or of unknown age)
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Reuse clamps only if undamaged and able to hold tension; otherwise replace with correct factory-style clamps
Tools and supplies
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Flat-blade screwdriver or suitable clamp driver
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Small socket/driver set as required by the installed clamps and airbox hardware
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Flashlight, shop towels, and masking tape or labels
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Optional smoke tester for the final leak check
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Do not use oily filter treatments; preserve the stock dry filtration setup
Procedure
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Verify the hose part number and final fitment against the VIN before ordering or opening the package.
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Park on level ground, let the engine cool fully, remove the key, and disconnect the battery ground. Follow the radio/security-code precautions applicable to the car.
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Photograph the existing hose routing, clamp positions, electrical plugs, and every small branch connection before disturbing them.
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Open the airbox clips and remove the lid/filter as needed for access. Keep debris out of the exposed airbox and intake tract.
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Label and disconnect any electrical connector or small hose that prevents the intake hose from moving. Pull on connector housings, never the wires.
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Loosen the clamps at both ends of the angled hose. Note their orientation so the screw heads remain accessible after reassembly.
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Gently twist the old hose free without levering against the air-flow meter, airbox neck, or other plastic fittings. Cap or cover open intake ports immediately.
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Compare the old and new hoses side by side. Confirm that the diameter, molded bends, branch ports, sealing lips, and overall length match.
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Inspect the airbox outlet, air-flow meter connection, sealing ring, clamps, and nearby rubber connectors. Replace cracked or hardened pieces rather than forcing the new hose over damaged fittings.
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Wipe the mating surfaces clean with a lint-free cloth. Do not allow cleaner or debris into the air-flow meter or intake.
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Fit the new hose without twisting it. Seat both ends fully against their stops and reconnect every labeled branch hose and electrical plug.
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Reposition the clamps as photographed and tighten evenly. Use the factory torque specification if available; do not overtighten or crush plastic necks.
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Reinstall the dry air-filter element and airbox cover. Confirm the filter is seated flat and every retaining clip is locked.
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Reconnect the battery. Start the engine without touching the throttle, listen for hissing, and confirm a steady idle with no warning light.
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Check for unmetered-air leaks, ideally with a smoke test. Perform a short road test, then recheck hose seating and clamp security after the engine cools.
Completion checklist
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No tools, caps, or rags left in the engine bay
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Every connector and branch hose reattached
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Hose untwisted and clear of rubbing points
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Airbox fully sealed
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Stable hot and cold idle
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No intake hiss or check-engine light
References
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Stoddard — 1997 993 air-cleaner parts diagram and fitment listing
