1.8 & 1.8T

Section for all things related to the 20-valve 4 cyl engine

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  1. 20V_JIMMY
    Sticky

    OEM management wiring: 1.8T => Mk2 harness install FAQ

    20v_jimmy, Dec 29, 2009 ... 37 38 39
    Replies:
    764
    Views:
    476,675
    DamienC
    Sep 14, 2025
  2. rubjonny
    Sticky

    SEAT Ibiza AQX/AYP 20v -> CE2 + general fusebox plug reference guide

    rubjonny, Apr 25, 2017 ... 2
    Replies:
    37
    Views:
    13,663
    rubjonny
    May 28, 2025
  3. MICHAEL GHIA
    Sticky

    1.8T 20V Engine codes FAQ

    Michael Ghia, Oct 31, 2004 ... 4 5 6
    Replies:
    107
    Views:
    268,548
    J66KE B
    Oct 15, 2016
  4. A.N. OTHER
    Sticky

    VAG Engine Part Dimensions

    A.N. Other, Nov 8, 2007
    Replies:
    1
    Views:
    8,181
    A.N. Other
    May 9, 2011
  5. Brian.G
    Sticky

    1.8T AUG Block Cutaway Pictures.

    Brian.G, Jun 18, 2009
    Replies:
    11
    Views:
    13,883
    Brian.G
    Jul 8, 2009
  6. MICKY1
    Sticky

    20v spec check - AEB fitting list

    micky1, May 17, 2009
    Replies:
    15
    Views:
    24,394
    micky1
    Jun 1, 2009
  7. CA11UM43

    400whp

    Ca11um43, Feb 11, 2026 at 7:42 PM
    Replies:
    0
    Views:
    31
    Ca11um43
    Feb 11, 2026 at 7:42 PM
  8. CA11UM43

    Piston ring gaps

    Ca11um43, Dec 18, 2025
    Replies:
    6
    Views:
    157
    Ca11um43
    Jan 30, 2026
  9. 0ZMAN

    1.8t Tappets (AGU) - Stroker

    0zman, Nov 2, 2024
    Replies:
    1
    Views:
    314
    sambo
    Jan 30, 2026
  10. CA11UM43

    Diesel gearbox

    Ca11um43, Jan 4, 2026
    Replies:
    1
    Views:
    68
    Toyotec
    Jan 5, 2026
  11. CA11UM43

    Top vs bottom mount turbo

    Ca11um43, Jan 2, 2026
    Replies:
    6
    Views:
    101
    Ca11um43
    Jan 3, 2026
  12. CA11UM43

    AMK internals

    Ca11um43, Nov 23, 2025
    Replies:
    1
    Views:
    104
    rubjonny
    Nov 24, 2025
  13. MK2BAL

    Alloy radiator

    mk2bal, Oct 5, 2025
    Replies:
    2
    Views:
    155
    mk2bal
    Oct 8, 2025
  14. MK2BAL

    RM electronics stand-alone ecu

    mk2bal, Sep 20, 2025
    Replies:
    3
    Views:
    190
    mk2bal
    Oct 5, 2025
  15. BIGJOE72

    1.8T(AUM) No throttle body respond when engine is warm

    BiGJoE72, Sep 20, 2025
    Replies:
    9
    Views:
    219
    rubjonny
    Sep 29, 2025
  16. Gazzmondo

    APX Serpentine belt question

    Gazzmondo, Sep 24, 2025
    Replies:
    2
    Views:
    115
    Gazzmondo
    Sep 29, 2025
  17. EDDIEDEBO

    Open Circuits

    eddiedebo, Jul 7, 2025
    Replies:
    10
    Views:
    434
    eddiedebo
    Jul 16, 2025
  18. JIM POTER

    NON start after ecu flash - Idea's?

    jim poter, Jun 10, 2025
    Replies:
    4
    Views:
    270
    Toyotec
    Jun 11, 2025
  19. CHOONA

    AUM Query

    Choona, May 8, 2025
    Replies:
    0
    Views:
    713
    Choona
    May 8, 2025
  20. CGTEN

    Pre-Cat O2 Sensor for AUM

    cgten, Mar 10, 2025
    Replies:
    3
    Views:
    463
    rubjonny
    Apr 7, 2025
  21. MARTTI HOOP

    S3 APY engine wiring loom an ECU

    Martti Hoop, May 31, 2020
    Replies:
    9
    Views:
    2,474
    rubjonny
    Apr 7, 2025
  22. DSJ20V

    Help with few wires on a mk2 to mk4 loom

    dsj20v, Apr 4, 2025
    Replies:
    0
    Views:
    262
    dsj20v
    Apr 4, 2025
  23. ROCCO_BALBOA

    1.8T swap heater matrix plumbing

    Rocco_Balboa, Jul 24, 2022
    Replies:
    7
    Views:
    1,595
    rubjonny
    Feb 17, 2025
  24. BIGJOE72

    SWAP - 1.8t(AUM) lupo(AUC) wiring doube check

    BiGJoE72, Jan 9, 2025
    Replies:
    6
    Views:
    514
    BiGJoE72
    Feb 5, 2025
  25. FALL-APART-DAVE

    1.8 20v NA intake on a 1.8 20vT?

    fall-apart-dave, Sep 27, 2024
    Replies:
    2
    Views:
    435
    fall-apart-dave
    Sep 30, 2024
  26. MIG

    Complete cylinder misfire, Mk4 1.8T AGU.

    MiG, Aug 23, 2024
    Replies:
    18
    Views:
    1,374
    rubjonny
    Sep 9, 2024
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