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Oct 20, 2025
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Hi All,

First time using this forum for information. Hopefully posting it right.
Recently thought about getting an engine under tray for my Seat Leon Cupra 290 (Year 2020) Mk3, with it coming up to winter conditions again. It didn't have one when I purchased the car last year.

I believe the part number for the Under Tray is SKU reference: 5Q0825236N? Let me know if incorrect.
Are the following codes correct for the fasteners used to fit the under tray?
  • WHT000729A - Self locking hex head bolt (not sure how many are used)?
  • N90335004 - Starlock washer (again not sure how many are used)?
Or is there any specific code for an assembling kit to go with the tray?

Final question: Is it worth buying the parts and getting a local garage to fit or get SEAT to complete the whole job (get the parts from stock and fit)?
 
Some Item numbers for the hevy duty tray:

Undertray 3q0825902b or 3q0825902c ?
90974701, Black wide head T-star screw A04B, £0.16 (x7)
0195307, Flange hex head bolt (M8x25mm), £0.93 (x7)
5Q0825921, Retaining bracket, £6.98 LHS
5Q0825922, Retaining bracket, £6.98 RHS
90755902, Spline head bolt with washer, £1.14 (x2)


Old prices - Found on the net :). I don't have any insulation on my Alltrack tray. Don't like the insulaion.....not possible to clean!

Forgot some of them but hope this is right!
 
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