OVERVIEW
Genuine VW/Audi Heat Shield Retainer Nut
N-907-088-03 is an original formed retainer nut used to hold specified heat shields, protective shields and insulation components at their assigned mounting points. The broad seating face spreads retention over the shield's mounting area, while the formed center engages the matching original attachment. Correct retention helps keep the shield in its intended position and maintains clearance around adjacent components. This listing supplies one individual retainer nut; the shield, stud and other hardware are separate.
Technical details
- OEM number: N-907-088-03 / N90708803.
- Form: Formed round retainer with a broad seating flange, as shown in the original product photograph.
- Assigned uses: Selected fuel tank-area shields, exhaust and floor pan heat shields, drive shaft-area shields and sound absorber mounting positions.
- Quantity supplied: One individual retainer nut.
- Application distinction: Shield retention hardware; this is not a driveshaft joint nut or a general-purpose structural fastening nut.
Common reasons to replace
A missing retainer can leave a shield loose, allowing vibration or rattling and reducing clearance from nearby parts. Replace a retainer with damaged center engagement, corrosion, a distorted seating flange or damage caused during shield removal. It may also be needed when replacing a shield or restoring missing original hardware after previous service. Inspect the mounting stud and shield hole before fitting new hardware. A new retainer cannot repair a torn shield mounting hole, a broken stud or a shield that is bent into contact with an exhaust component; correct those faults as part of the repair.
Installation and service notes
Allow the exhaust and surrounding components to cool before shield service. Support the shield, check its locating points and align it without forcing or distorting the mounting area. Confirm the original retaining point in the vehicle-specific diagram, then install the correct retainer using the specified procedure and tool. Follow the original tightening or seating instructions rather than applying a generic structural-nut torque. Check that the shield remains secure and clears rotating shafts, exhaust components and nearby lines. If more than one mounting point has missing or damaged hardware, obtain the number of retainers required for the complete repair.
Vehicle fitment
Each entry below is restricted to the identified shield or insulation fastening position that specifies N90708803. The same vehicle may use several different shield retainers; confirm the original mounting position and do not substitute this part for adjacent fasteners.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A4 | 2015 | 2.0L turbo gasoline | Premium / Premium Plus; B8; Match original shield fastening diagram | Fuel tank shield retaining position only; original N90708803 location. |
| Audi S4 | 2015 | 3.0L supercharged gasoline V6 | Premium Plus; quattro; B8; Match original shield fastening diagram | Fuel tank area heat shield retaining position only; original N90708803 location. |
| Audi A5 | 2015 | 2.0L turbo flex-fuel | Premium Plus; quattro; Cabriolet; Match original shield fastening diagram | Fuel tank diagram position 10; confirm original Cabriolet configuration. |
| Audi S5 | 2015 | 3.0L supercharged gasoline V6 | Premium Plus / Prestige; quattro; Match original shield fastening diagram | Fuel tank area shield retaining position only; body style and shield matched by VIN. |
| Audi A5 | 2018 | 2.0L turbo gasoline | Prestige; quattro; B9; Match original shield fastening diagram | Floor pan heat shield clip, diagram position 4; not adjacent 8E0825265D shield nut. |
| Audi S5 | 2018 | 3.0L turbo gasoline V6 | Prestige; quattro; B9; Match original shield fastening diagram | Assigned front heat shield retaining position; match original nut. |
| Audi Q7 | 2018 | 2.0L turbo gasoline | Premium Plus; quattro; 4M; Match original shield fastening diagram | Drive shaft-area shield retainer only; not prop shaft joint hardware. |
| Audi Q7 | 2018 | 3.0L supercharged gasoline V6 | Premium Plus; quattro; 4M; Match original shield fastening diagram | Drive shaft-area shield retainer only; not prop shaft joint hardware. |
| Audi RS7 | 2018 | 4.0L twin-turbo gasoline V8 | Base / Performance; quattro; C7; Match original shield fastening diagram | Drive shaft-area shield nut, diagram position 8; not prop shaft joint hardware. |
| Audi A5 Sportback | 2018 | 2.0L turbo gasoline | Premium Plus; Sportback; B9; Match original shield fastening diagram | Assigned cowl sound absorber nut; match original retainer location. |
| Audi SQ8 | 2021 | 4.0L twin-turbo gasoline V8 with mild-hybrid system | Premium Plus; quattro; Match original drive shaft-area shield assembly | Drive shaft-area shield retainer, diagram position 8. Match original N90708803 shield attachment; this is not a drive shaft joint bolt. |
| Audi SQ7 | 2021 | 4.0L twin-turbo gasoline V8 with mild-hybrid system | Prestige; quattro; Match original drive shaft-area shield assembly | Drive shaft-area shield retainer, diagram position 8. Match original N90708803 shield attachment; this is not a drive shaft joint bolt. |
| Audi RS Q8 | 2021 | 4.0L twin-turbo gasoline V8 with mild-hybrid system | Base; quattro; Match original drive shaft-area shield assembly | Drive shaft-area shield retainer, diagram position 8. Match original N90708803 shield attachment; this is not a drive shaft joint bolt. |
Confirm N90708803, original retainer location and shield configuration by VIN before ordering.