OVERVIEW
Genuine sealing ring for the exact assigned engine connection
N-902-954-01 is the Genuine VW/Audi O-ring specified at the coolant-flange and oil-system connections listed below. The nominal factory size is 29.2×3.
The same complete factory number is used at different assigned connections. Follow the application in the fitment table and confirm the original fitting. Size or visual resemblance alone does not establish compatibility at another engine joint.
Technical details
- Complete factory number: N-902-954-01.
- Factory specification: 29.2 mm nominal inside diameter × 3 mm cross-section.
- Design: round-section engine sealing O-ring.
- Quantity supplied: one individual O-ring.
These are functional seal dimensions. This listing does not specify an unverified elastomer composition, temperature rating or universal fluid compatibility. Use the seal only at the connection assigned this exact factory number.
Common reasons to replace
- Leakage is traced to the original sealed connection.
- The removed ring is flattened, hardened or cracked.
- The seal is cut or pinched.
- The associated flange or pipe has been removed for service.
- An incorrect seal was installed previously.
Inspect the fitting, receiving bore and sealing surfaces before installing a replacement. Cracked flanges, corroded pipe ends or damaged grooves need separate repair; a new O-ring cannot compensate for a defective housing.
Vehicle fitment
Read the connection and engine restrictions carefully. The Volkswagen rows refer to the specified coolant-flange joint; the R8 row refers to its assigned oil-system connection.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Jetta GLI | 1992 | 2.0L 16-valve gasoline I4; 9A | A2 sedan; Original coolant flange connection | 16-valve engine and original N90295401 coolant flange position only. |
| Volkswagen GTI | 1989 | 1.8L 16-valve gasoline I4; PL | A2 16V hatchback; Original coolant flange connection | 16-valve engine and original N90295401 coolant flange position only. |
| Volkswagen Scirocco | 1986 | 1.8L 16-valve gasoline I4; PL | 16V coupe; Original coolant flange connection | 16-valve engine and original N90295401 coolant flange position only. |
| Volkswagen Passat | 1991 | 2.0L 16-valve gasoline I4; 9A | B3 sedan or wagon; Original coolant flange connection | 16-valve engine and original N90295401 coolant flange position only. |
| Audi R8 | 2015 | 4.2L FSI gasoline V8; TK7 | Coupe or Spyder; quattro; S tronic automatic; original oil-cooler pipe connection | Original N90295401 oil-system position; verify pipe number and automatic-transmission application. |
Installation guidance
Follow the factory procedure for the applicable system. Let the engine cool, safely drain or contain the relevant fluid and clean the sealing surfaces without scoring them. Fit the correct ring without twisting it and use the specified assembly lubricant and fastening procedure.
Restore the correct fluid level and complete the required bleeding, level-check or leak-test procedure for the serviced system. Recheck the connection as directed by the vehicle service information.
Ordering information
Supplied as one genuine sealing ring. Flanges, pipes, retaining hardware and fluids are not included. Confirm the complete number, engine configuration and required quantity before ordering.