Apologies if this has already been posted somewhere but whilst looking for some part numbers online i came across this... I take no credit for anything here but as its useful to me i thought it might be useful to others.
http://www.vagcars.co.uk/forums/showthread.php?2386-SEAT-Leon-1M-Info
Badges and Stickers
· 6K0 853 687 T 739 - SEAT letters, rear badge
· 1M6 853 687 E 739 - LEON letters, rear badge
· 6K5 853 713 A Z09 - Black LEON sticker-badge
· 1M6 853 687 C GQF - Chrome 20V with red T (Seat Dealer)
· 6K0 853 687 AE 739 - 20VT chrome rear badge
· 1ML 853 687 A - Leon black cupra badge
· 6KL 853 687 739 - Ibiza red R-badge without flag
· 6K6 853 687 AD JHQ - Ibiza black cupra badge with flag
· 6K6 853 675 F JHQ - Ibiza black cupra badge with flag, front
· 6K0 853 681 JHQ - Ibiza flag badge
· 1ML 853 687 - Leon red R badge with flag
· 1M6 853 687 G JHQ - 4 flag cupra badge
· 8D0 853 737 E 2ZZ - Audi A3 chrome/red T
· 8N0 853 601 A - Audi S line badge
· 8D9 853 740 2ZZ - Audi RS4 badge
· 1J0 853 675 Q 739 - VW R32 rear badge
· 1C0 853 675 A GX2 - new Beetle turbo badge
· 6K0 853 679 A 739 - SEAT front grille-badge
· 4D0 010 138 E - alarm sticker
· 038 103 940 G - SEAT badge for engine cover
Interior Modifications
· 1M0 099 002 - 4 pcs door-lock pin/button set
· 1M5 071 500 - 4 pcs sill guards set
· 6X0 857 552 E 3H8 - sunvisor, black
· 6X0 857 551 E 3H8 - sunvisor, black
· 3B0 857 561 B B41 – sunvisors part x2
· 3B0 857 563 B41 – sunvisors part x2
· 895 857 621 B41 – sunvisors part x2
· 3B0 857 511 A 01C - interior mirror, black
· 1M0 867 457 A 1UQ - A-pillar trim, black
· 1M0 867 458 A 1UQ - A-pillar trim, black
· 1M0 867 243 C 1UQ - B-pillar trim, black
· 1M0 867 244 C 1UQ - B-pillar trim, black
· 1M0 867 283 - B-pillar part
· 1M0 867 284 - B-pillar part
· 1M6 867 617 C 1UQ - C-pillar, upper middle trim, black
· 1M6867287H 1UQ - C-pillar, left upper trim, black
· 1M6867288H 1UQ - C-pillar, right upper trim, black
· 1M1 857 919 D 1UQ - panels under steering wheel, black (LHD cars)
· 1M1 857 095 M1UQ - glove box, black (LHD cars)
· 1M5 017 221 - boot net
· 8L9 711 463 PZE - handbrake lever trim, black/red leather
· 1M1 721 535 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M0 721 275 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M0 721 961 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M1 864 551 B B41 - left footrest, Cupra R/ Golf A4 GTI 337-style
· 8N1 064 200 - 3 pcs pedal set, Audi TT-style
· 000 071 700 - 3 pcs SEAT Sport aluminium pedals
· 1M0 061 510 - 4 pcs carpet mat set, red seams
· 1M1 819 793 A41P - air vent for door window, left
· 1M1 819 794 A41P - air vent for door window, right
· 1ML 820 951 40N C03D - center air vent, Cupra R
· 1ML 820 901 40N - left and right air vent, Cupra R
· 8L0 862 533 B AQ4 - Audi A3 2-cupholder-insert for armrest
· 000 061 127 - Vorex coat hanger
· 7L6 947 175 A - VW Touareg LED Electric Torch
· 1M1 959 561 56J - taxi light switch
· 3B7 947 105 F2EN – W8 Light housing
· 3B0 972 706 – Plug for W8 Light
· 000 979 131A x 2 – Wires for W8 light
· 1J0 857 465 Y20 – MkIV Golf Sunglasses Holder
· A8LO 820 901 CB 98 – Audi S3 Side vents (2 required)
· A8L2 820 951 B9 8 – Audi S3 Centre vent
· IM0 863 274 40N - OBDII Cover VAG-COM Cover
· 1MO-863-263-F40N - Seat Leon SatNav Centre Console Facia
· 1M0-858-061-C1-UQ - Seat Leon SatNav Centre Console (Expensive!!!)
Exterior Modifications
· 1J1 955 426 A - VW Golf IV aero wiper blade (LHD cars)
· 1J1 955 425 A - VW Golf IV aero wiper blade (LHD cars)
· 1J1 955 409 D - VW Golf IV aero wiper arm (LHD cars)
· 1J1 955 410 D - VW Golf IV aero wiper arm (LHD cars)
· 1J2 955 426 A – VW Golf IV aero wiper blades (RHD cars)
· 1J2 955 425 A – VW Golf IV aero wiper blades (RHD cars)
· 1J2 955 409 D – VW Golf IV aero wiper arms (RHD cars)
· 1J2 955 410 D – VW Golf IV aero wiper arms (RHD cars)
· 6Q6 955 707 A - VW Polo rear wiper arm
· 6Q6 955 425 A - VW Polo rear aero wiper blade
· 6Q6 955 435 A - VW Polo rear wiper cover cap
· 1T0 955 707 A - VW Touran rear wiper arm
· 7E0 955 425 - VW Touran rear wiper arm
· 6Q6 955 435 B - VW Touran rear wiper cover cap
· 8N0 821 172 B - Audi TT Fender Liner w/vents
· 1J6 827 550 C - VW Golf IV hatch lifter
· 1M0 075 111- SEAT Leon front mudflaps
· 1ML 805 903 - Cupra R front lip
· 1MO 853 651J 79Y – Seat Honeycomb Centre Grill
· 1MO 853 653G 79Y – Seat Honeycomb Radiator Grill
· 391 51S 6AE 02 - Honda Civic Stubby Aerial
Security Modifications
· 3B4 839 879 A GRU - primed cover for de-locking
· 1K4 839 167 - de-locking metal blanking plate
· METALDISC – Delocking disc for drivers door (its FREE!)
Engine Bay Modifications
· 1M0 823 737 FB 41 - engine bonnet seal
· 1M5 064 700 - SEAT Sport fuel filler cap trim
· 06A 906 461 LX - MAF/LMM
· 059 919 501A - green coolant temperature sensor
· 06B 905 115E - Audi TT (225) Hitachi Bolt-down coilpacks
· N903 168 02 - round rubber seal
· 032 121 142 - retaining clip
· 8L9 805 629 A - Audi S3 upper strut brace
· 8N0 199 403 B - Audi S3 lower strut brace
· N 908 106 01 – riv nut x2, for lower strut brace
· N 104 176 01 - bolt x2, for lower strut brace
· N 904 773 01 - washer x2, for lower strut brace
· 06A 119 518 G - lower engine cover
· 06A 103 724 AC - Audi A3 engine cover
. 06A906461LX - Air mass meter' is engine specific AUQ 1.8
Neuspeed Part Numbers
· 66.02.86 - Audi TT Quattro, short shift kit
· 95.10.52P -Billet aluminium dipstick cap
· 95.10.57P - Billet aluminium coolant reservoir cap
PowerFlex Part Numbers
· PFF85-420 - Front Engine Mount Dog Bone
· BS009K Bump Stops Kit
K&N Part Numbers
· RR-2803 - Reverse Conical Universal Air Filter
Samco Part Numbers
· TCS195/1 - 4 piece turbo hose kit
Richbrook Part Numbers
· 3000.37 - Touring Gear ****, silver
· 4000.17 - Short Gear Shaft Sleeve, silver
· 4200.03 - Gear Shaft Gaiter, red
· 8000.16 - Gear Shaft Surround, chrome
· 4300.03 - Hand Brake Gaiter, red
· 7000.30 - Hand Brake Handle with grip, silver
· SEAT numbered Tax Disc Holder
Forge Motorsport Part Numbers
· FMCL007P - 007P Recirculating Dump Valve
· FMDVSU110 - New Springs for 007P Dump Valve
· FMSEAFMIC - Front Mounted Intercooler
· FMPFF85-420 - Poly Engine Mounting Dog Bone Bushes
http://www.vagcars.co.uk/forums/showthread.php?2386-SEAT-Leon-1M-Info
Badges and Stickers
· 6K0 853 687 T 739 - SEAT letters, rear badge
· 1M6 853 687 E 739 - LEON letters, rear badge
· 6K5 853 713 A Z09 - Black LEON sticker-badge
· 1M6 853 687 C GQF - Chrome 20V with red T (Seat Dealer)
· 6K0 853 687 AE 739 - 20VT chrome rear badge
· 1ML 853 687 A - Leon black cupra badge
· 6KL 853 687 739 - Ibiza red R-badge without flag
· 6K6 853 687 AD JHQ - Ibiza black cupra badge with flag
· 6K6 853 675 F JHQ - Ibiza black cupra badge with flag, front
· 6K0 853 681 JHQ - Ibiza flag badge
· 1ML 853 687 - Leon red R badge with flag
· 1M6 853 687 G JHQ - 4 flag cupra badge
· 8D0 853 737 E 2ZZ - Audi A3 chrome/red T
· 8N0 853 601 A - Audi S line badge
· 8D9 853 740 2ZZ - Audi RS4 badge
· 1J0 853 675 Q 739 - VW R32 rear badge
· 1C0 853 675 A GX2 - new Beetle turbo badge
· 6K0 853 679 A 739 - SEAT front grille-badge
· 4D0 010 138 E - alarm sticker
· 038 103 940 G - SEAT badge for engine cover
Interior Modifications
· 1M0 099 002 - 4 pcs door-lock pin/button set
· 1M5 071 500 - 4 pcs sill guards set
· 6X0 857 552 E 3H8 - sunvisor, black
· 6X0 857 551 E 3H8 - sunvisor, black
· 3B0 857 561 B B41 – sunvisors part x2
· 3B0 857 563 B41 – sunvisors part x2
· 895 857 621 B41 – sunvisors part x2
· 3B0 857 511 A 01C - interior mirror, black
· 1M0 867 457 A 1UQ - A-pillar trim, black
· 1M0 867 458 A 1UQ - A-pillar trim, black
· 1M0 867 243 C 1UQ - B-pillar trim, black
· 1M0 867 244 C 1UQ - B-pillar trim, black
· 1M0 867 283 - B-pillar part
· 1M0 867 284 - B-pillar part
· 1M6 867 617 C 1UQ - C-pillar, upper middle trim, black
· 1M6867287H 1UQ - C-pillar, left upper trim, black
· 1M6867288H 1UQ - C-pillar, right upper trim, black
· 1M1 857 919 D 1UQ - panels under steering wheel, black (LHD cars)
· 1M1 857 095 M1UQ - glove box, black (LHD cars)
· 1M5 017 221 - boot net
· 8L9 711 463 PZE - handbrake lever trim, black/red leather
· 1M1 721 535 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M0 721 275 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M0 721 961 A - pedal, Cupra R/ Golf A4 GTI 337-style
· 1M1 864 551 B B41 - left footrest, Cupra R/ Golf A4 GTI 337-style
· 8N1 064 200 - 3 pcs pedal set, Audi TT-style
· 000 071 700 - 3 pcs SEAT Sport aluminium pedals
· 1M0 061 510 - 4 pcs carpet mat set, red seams
· 1M1 819 793 A41P - air vent for door window, left
· 1M1 819 794 A41P - air vent for door window, right
· 1ML 820 951 40N C03D - center air vent, Cupra R
· 1ML 820 901 40N - left and right air vent, Cupra R
· 8L0 862 533 B AQ4 - Audi A3 2-cupholder-insert for armrest
· 000 061 127 - Vorex coat hanger
· 7L6 947 175 A - VW Touareg LED Electric Torch
· 1M1 959 561 56J - taxi light switch
· 3B7 947 105 F2EN – W8 Light housing
· 3B0 972 706 – Plug for W8 Light
· 000 979 131A x 2 – Wires for W8 light
· 1J0 857 465 Y20 – MkIV Golf Sunglasses Holder
· A8LO 820 901 CB 98 – Audi S3 Side vents (2 required)
· A8L2 820 951 B9 8 – Audi S3 Centre vent
· IM0 863 274 40N - OBDII Cover VAG-COM Cover
· 1MO-863-263-F40N - Seat Leon SatNav Centre Console Facia
· 1M0-858-061-C1-UQ - Seat Leon SatNav Centre Console (Expensive!!!)
Exterior Modifications
· 1J1 955 426 A - VW Golf IV aero wiper blade (LHD cars)
· 1J1 955 425 A - VW Golf IV aero wiper blade (LHD cars)
· 1J1 955 409 D - VW Golf IV aero wiper arm (LHD cars)
· 1J1 955 410 D - VW Golf IV aero wiper arm (LHD cars)
· 1J2 955 426 A – VW Golf IV aero wiper blades (RHD cars)
· 1J2 955 425 A – VW Golf IV aero wiper blades (RHD cars)
· 1J2 955 409 D – VW Golf IV aero wiper arms (RHD cars)
· 1J2 955 410 D – VW Golf IV aero wiper arms (RHD cars)
· 6Q6 955 707 A - VW Polo rear wiper arm
· 6Q6 955 425 A - VW Polo rear aero wiper blade
· 6Q6 955 435 A - VW Polo rear wiper cover cap
· 1T0 955 707 A - VW Touran rear wiper arm
· 7E0 955 425 - VW Touran rear wiper arm
· 6Q6 955 435 B - VW Touran rear wiper cover cap
· 8N0 821 172 B - Audi TT Fender Liner w/vents
· 1J6 827 550 C - VW Golf IV hatch lifter
· 1M0 075 111- SEAT Leon front mudflaps
· 1ML 805 903 - Cupra R front lip
· 1MO 853 651J 79Y – Seat Honeycomb Centre Grill
· 1MO 853 653G 79Y – Seat Honeycomb Radiator Grill
· 391 51S 6AE 02 - Honda Civic Stubby Aerial
Security Modifications
· 3B4 839 879 A GRU - primed cover for de-locking
· 1K4 839 167 - de-locking metal blanking plate
· METALDISC – Delocking disc for drivers door (its FREE!)
Engine Bay Modifications
· 1M0 823 737 FB 41 - engine bonnet seal
· 1M5 064 700 - SEAT Sport fuel filler cap trim
· 06A 906 461 LX - MAF/LMM
· 059 919 501A - green coolant temperature sensor
· 06B 905 115E - Audi TT (225) Hitachi Bolt-down coilpacks
· N903 168 02 - round rubber seal
· 032 121 142 - retaining clip
· 8L9 805 629 A - Audi S3 upper strut brace
· 8N0 199 403 B - Audi S3 lower strut brace
· N 908 106 01 – riv nut x2, for lower strut brace
· N 104 176 01 - bolt x2, for lower strut brace
· N 904 773 01 - washer x2, for lower strut brace
· 06A 119 518 G - lower engine cover
· 06A 103 724 AC - Audi A3 engine cover
. 06A906461LX - Air mass meter' is engine specific AUQ 1.8
Neuspeed Part Numbers
· 66.02.86 - Audi TT Quattro, short shift kit
· 95.10.52P -Billet aluminium dipstick cap
· 95.10.57P - Billet aluminium coolant reservoir cap
PowerFlex Part Numbers
· PFF85-420 - Front Engine Mount Dog Bone
· BS009K Bump Stops Kit
K&N Part Numbers
· RR-2803 - Reverse Conical Universal Air Filter
Samco Part Numbers
· TCS195/1 - 4 piece turbo hose kit
Richbrook Part Numbers
· 3000.37 - Touring Gear ****, silver
· 4000.17 - Short Gear Shaft Sleeve, silver
· 4200.03 - Gear Shaft Gaiter, red
· 8000.16 - Gear Shaft Surround, chrome
· 4300.03 - Hand Brake Gaiter, red
· 7000.30 - Hand Brake Handle with grip, silver
· SEAT numbered Tax Disc Holder
Forge Motorsport Part Numbers
· FMCL007P - 007P Recirculating Dump Valve
· FMDVSU110 - New Springs for 007P Dump Valve
· FMSEAFMIC - Front Mounted Intercooler
· FMPFF85-420 - Poly Engine Mounting Dog Bone Bushes
its in the FAQ 
