OVERVIEW
Genuine VW/Audi air-conditioning hose attachment bolt, part number N-104-154-02. This original M8 x 40 fastener is cataloged for the specified A/C hose attachments at the compressor, including the RS4 compressor-to-condenser connection and the allroad compressor-to-receiver/drier connection listed below. Match the fastener to the actual hose connection before ordering.
Technical details
- Original part number: N-104-154-02 / N10415402.
- Published nominal size: M8 x 40.
- Socket-head bolt with a washer beneath the head, as shown in the original photograph.
- Cataloged earlier part number: N10415401.
- One bolt supplied. Hose, compressor, seals and refrigerant are separate.
The hose attachment must remain seated in the designed compressor connection. The correct bolt length and contact arrangement are necessary for assembling that joint as specified. Other M8 fasteners may have different lengths, heads or assigned mounting positions.
The mounting bolt retains the attachment; the separate connection seal provides the refrigerant seal. Replacing hardware alone does not repair a cracked fitting, damaged hose or deteriorated sealing ring. Inspect the complete connection when diagnosing a leak.
Common reasons to replace
Replace a missing bolt or one with damaged threads, a stripped drive recess, visible deformation or corrosion that affects serviceability. Renew hardware after removal whenever the factory procedure calls for replacement.
Compressor or hose replacement can reveal prior overtightening or driver damage. Inspect the mating threaded hole and hose attachment as well as the bolt before reassembly. Damage to either component requires attention before tightening new hardware.
Poor cooling, unusual compressor operation or refrigerant loss can have several causes. Diagnose the system and identify the faulty component instead of assuming the attachment bolt is responsible. Do not overtighten the connection to compensate for a leak.
Installation and service notes
Follow the repair procedure for the exact compressor and hose arrangement. If the refrigerant circuit must be opened, recover the refrigerant with the prescribed equipment before disconnecting the line.
Confirm the original part number at the assigned connection. Keep the hose aligned without strain and install the correct separate seal when required. Check that the connection surfaces and threaded hole are undamaged and prepared as directed.
Use the correct driver for the actual recess shown on the supplied fastener. Engage it fully, start the bolt by hand and confirm normal seating before final tightening. A bolt that binds or fails to seat can indicate incorrect hardware, poor alignment or damaged threads.
Use the tightening specification for this connection. Do not calculate torque from the M8 x 40 designation or transfer a value from a compressor bracket bolt. Follow the prescribed instructions for thread treatment and hardware replacement.
After service, complete the specified leak and functional checks. Use the refrigerant and lubricant required by the actual vehicle during any system servicing. This listing supplies one mounting bolt and contains no fluid or pressurized component.
Fitment
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi RS4 | 2007–2008 | 4.2L naturally aspirated V8, BNS | B7 sedan, quattro; 6-speed manual | Specified compressor-to-condenser hose attachment at the compressor. Confirm N10415402 and the original hose/compressor arrangement; other bolts and seals are separate. |
| Audi allroad quattro | 2001–2005 | 2.7L twin-turbocharged gasoline V6 | C5 wagon, quattro; Confirm original compressor and hose connection | Specified compressor-to-receiver/drier hose attachment at the compressor. Match N10415402 and the original hose/compressor arrangement; other fasteners and seals are separate. |
Confirm the original bolt number and exact compressor hose attachment before ordering. One bolt supplied.