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Pro DRY S replacement with the correct engine and housing
The aFe 31-10118 replaces the original airbox filter in the specified applications with oil-free synthetic media. The current exact manufacturer identifies Audi A42002–2008 and specifies TWO oil-free synthetic media layers. Exact per-part retailer tables positively identify the carried A4/A4 Quattro Avant/Cabriolet rows through2009 with individual engine detail. Those original bounds are retained as chassis/body/housing qualifications rather than being deleted solely because the current primary headline ends2008. The2009 model year spans different sedan and carryover body generations; an engine displacement or shared A4 name does not certify every new B8 sedan, Avant or Cabriolet housing. Confirm the original element and exact body/chassis before ordering. No S4/RS4, later-generation or all-engine row is added from a generic vehicle selector. The exact two-layer synthetic description governs, rather than another Audi filter’s three-layer specification or a generic oiled-media field.
Key Features
- Oil-free synthetic filtration media.
- Washable oil-free synthetic media. Use the specified aFe POWER CLEANER, rinse appropriately and dry fully; do not apply air-filter oil. The current exact manufacturer specifies two layers of oil-free synthetic media.
- Rounded open pleats provide usable filter area and dust-holding capacity.
- Full polyurethane perimeter frame and progressive bump seal.
- The exact current manufacturer publishes no numerical airflow-gain, horsepower or efficiency result. A generic retailer99.2-percent or a different Audi filter’s result is not copied as this part’s current primary test.
Fitment
| Detail | Value |
|---|---|
| Current manufacturer scope | Audi A42002–2008; exact chassis/body/engine and original airbox required |
| Original retailer scopes | A4/A4 Quattro Avant/Cabriolet individual bounds through2009 retained qualified |
| 2009 generation hold | Carryover body and newer sedan scopes must be separated by actual housing; no blanket B8 approval |
| Current media | TWO progressively finer oil-free synthetic layers per exact primary |
| Package | One OE replacement panel; original airbox retained; no supplied hose/cleaning kit established |
31-10118: verify the exact engine, original element and housing. Model or trim names alone do not establish all-engine interchangeability.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 31-10118 |
| Media | Pro DRY S; oil-free synthetic media |
| Configuration | One OE-replacement air-filter element; original housing retained |
| Pleat description | Rounded open pleats; no verified numeric pleat depth on the exact current primary |
| Frame / seal | Polyurethane perimeter frame; progressive bump seal |
| Service | Washable oil-free synthetic media. Use the specified aFe POWER CLEANER, rinse appropriately and dry fully; do not apply air-filter oil. The current exact manufacturer specifies two layers of oil-free synthetic media. |
| Flow statement | The exact current manufacturer publishes no numerical airflow-gain, horsepower or efficiency result. A generic retailer99.2-percent or a different Audi filter’s result is not copied as this part’s current primary test. |
| Emissions | Exact manufacturer page states this filter does not require a CARB EO number; other modifications are not certified by that statement |
What's Included
- One Pro DRY S OE-replacement air-filter element.
- No complete airbox, intake tube, sensor, separate coupler kit or filter-service supplies are documented as included.
About aFe Power
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
Related Parts
- Browse aFe Power filter configurations; compare the exact original housing and engine.
- Manufacturer filter-media maintenance guidance; follow the oil-free Pro DRY S cleaning routine.
Frequently Asked Questions
What is the 31-10118?One Pro DRY S OE-replacement air-filter element for the verified housing and engine application described here; this is not a complete intake system.
Which application should I verify?The current exact manufacturer identifies Audi A42002–2008 and specifies TWO oil-free synthetic media layers. Exact per-part retailer tables positively identify the carried A4/A4 Quattro Avant/Cabriolet rows through2009 with individual engine detail. Those original bounds are retained as chassis/body/housing qualifications rather than being deleted solely because the current primary headline ends2008. The2009 model year spans different sedan and carryover body generations; an engine displacement or shared A4 name does not certify every new B8 sedan, Avant or Cabriolet housing. Confirm the original element and exact body/chassis before ordering. No S4/RS4, later-generation or all-engine row is added from a generic vehicle selector. The exact two-layer synthetic description governs, rather than another Audi filter’s three-layer specification or a generic oiled-media field.
Is the Pro DRY S media oiled?Washable oil-free synthetic media. Use the specified aFe POWER CLEANER, rinse appropriately and dry fully; do not apply air-filter oil. The current exact manufacturer specifies two layers of oil-free synthetic media.
Does the flow percentage guarantee more engine power?The exact current manufacturer publishes no numerical airflow-gain, horsepower or efficiency result. A generic retailer99.2-percent or a different Audi filter’s result is not copied as this part’s current primary test.
How does this filter seal?Its progressive bump seal and full polyurethane perimeter frame conform to the original housing. The manufacturer says separate filter gaskets or sealants are not required; the existing housing must still close and secure correctly.
Are a hose coupler and cleaning kit supplied?The exact listing identifies an OE-replacement filter. A generic Coupler Included field does not establish a separate hose package; no airbox, tube, sensor, cleaner or oil bottle is documented as supplied.
Does the2009 retailer endpoint certify every2009 A4?No. Exact retailer rows exist, but the model year contains different chassis and carryover bodies. Retain the original bounded scopes with exact engine/body/airbox verification; no blanket new-generation approval follows the model name.
When should I clean it?Inspect according to actual dust exposure and restriction. Washable oil-free synthetic media. Use the specified aFe POWER CLEANER, rinse appropriately and dry fully; do not apply air-filter oil. The current exact manufacturer specifies two layers of oil-free synthetic media. Use low-pressure rinse from the clean side toward the dirty side, let the element dry naturally before reinstalling. Do not use heat, compressed air or any filter oil. Do not treat an older general-care mileage example as a guaranteed interval for every vehicle or environment.
Installation Instructions
- Read the exact manufacturer product information for 31-10118 and the original vehicle airbox service procedure.
- With the engine off and cool, compare the new filter and original element, including the sealing interface. Resolve an engine or housing mismatch before installation.
- Open the original housing according to its service procedure, remove the old element and keep debris out of the clean intake path. Clean the housing seat.
- Seat the polyurethane frame evenly without folding the bump seal or adding sealant. Close and secure the original housing and inspect all its attachments.
- Washable oil-free synthetic media. Use the specified aFe POWER CLEANER, rinse appropriately and dry fully; do not apply air-filter oil. The current exact manufacturer specifies two layers of oil-free synthetic media.
No vehicle-specific installation PDF or numeric airbox torque is linked on this exact manufacturer page. Follow the original housing service procedure and the correct oil-free Pro DRY S maintenance directions. Read the manufacturer media maintenance guidance.
31-10118: verify the original filter interface before operation.
California Proposition 65 Warning
- This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
- California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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