The TTLink (TTX) is Link Engine Management’s G4X plug-in ECU for the Volkswagen Group PQ34 platform with the 1.8T turbocharged engine and factory drive-by-wire e-throttle. It covers a wide range of Audi, VW, Seat, and Skoda models sharing the same 1.8T engine management hardware. The PCB fits inside the factory ECU enclosure with no loom modifications. Onboard MAP sensor (4-bar or 7-bar) is included.
Fitment requirements — check before ordering:
– Engine must be 1.8T 20V (engine codes include AJQ, APX, AUM, AUQ)
– ECU must have 2 connectors with 121 pins total
– Must be drive-by-wire (e-throttle) — not cable throttle models
– Must be manual transmission
– FWD or 4WD Haldex only (no DSG or automatic)
CAN cable note: The TTLink cannot use CANJST cables. Use the CANLTW (PN 101-0211) or CANF (PN 101-0020) cable for connecting CAN devices.
Vehicle Fitment (representative — all require 1.8T + DBW + manual + 2-plug 121-pin ECU)
| Vehicle | Years |
|---|---|
| Audi TT 8N (FWD/Quattro) | 1998–2006 |
| Audi A3 / S3 | 1998–2005 |
| Audi A4 / A6 | 1998–2007 |
| VW Golf / Bora / Jetta / New Beetle | 1999–2009 |
| VW Passat | 1998–2002 |
| Seat Leon / Ibiza | 1998–2008 |
| Skoda Octavia | 1999–2005 |
Manual transmission only.
Key Specifications
| Property | Value |
|---|---|
| SKU | 208-4000 |
| Link model code | TTX |
| Onboard MAP sensor | Yes — 4-bar or 7-bar (check board sticker) |
| E-throttle | Supported (factory DBW retained) |
| Transmission | Manual only (no DSG/auto) |
| CAN cable | CANLTW (101-0211) or CANF (101-0020) required — CANJST not compatible |
| CAN buses | 2 |
| Base map | Included |
| Software | PCLink G4X (free) |
G4X Platform Features
- Factory e-throttle retained and controlled
- Boost control
- Launch control, anti-lag, flat shift
- Sequential injection and direct spark
- 512 MB onboard data logging, 250 channels, 1 kHz/ch
- 6D fuel and ignition mapping
Recommended Accessories
- LinkECU CAN Lambda Controller — wideband lambda via CAN (CANLTW cable required)
- Link XS Expansion Loom — additional I/O
Frequently Asked Questions
My 1.8T VW/Audi has a single ECU connector — will the TTLink fit?
No. The TTLink requires the 2-connector, 121-pin ECU header. Single-connector 1.8T variants use a different ECU hardware platform and are not compatible.
Does it support cable throttle (non-DBW) 1.8T models?
No. The TTLink is specifically designed for drive-by-wire (e-throttle) models. Cable throttle 1.8T variants require a different product.
What CAN cable do I need?
Use the CANLTW (PN 101-0211) or CANF (PN 101-0020). The CANJST4 cable is not compatible with the TTLink.
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