1.4T Swap Wiki (In Development)

There is multiple reasons we chose to pursue the 1.4T swap in our MK1 and soon to expand to other generation chassis. If you want to read more about our main reasoning we would refer you to our Youtube video were we get in more details but to summarize it:
1. Power
2. Weight
3. Fuel efficiency
4. Availability

The EA211 has been in production since early 2011. Our swap was designed around the 1.4T which has been in mass production since 2013 to 2021. Since these engines have been mass produced they have became easily available on Market Place deals and Junk Yards.

You will be able to find your donor powertrain in the following North American chassis:
GEN1 – 2016-2017 Jetta (Engine code: CZTA / ECU code: MED17.1.21) — CURRENTLY AVAILABLE AND SUPPORTED
GEN2 – 2018-2024 Jetta and Golf (engine code: CAXA, DJXA / ECU code: MED17.1.27) — SUPPORT COMING IN 2026

It is important to note that GEN1 engines must be paired with a GEN1 ECU, and GEN2 engines must be paired with a GEN2 ECU, as the pinouts and ECU interfaces differ between generations. We currently offer full support for the GEN1 version, while GEN2 support is expected to be released in early 2026.

To complete this swap, there are several crucial components required, along with optional, but highly recommended parts to achieve peak performance. Throughout the development of our prototype car, we focused on optimizing the platform to the best of our ability and we continue to develop new solutions to make this swap more accessible, reliable, and high-performing. If you have any recommendations or feedback regarding the design or included components of our swap kit, feel free to reach out and let us know how we could further improve it.

3.1 OEM Mandatory Parts / Parts to Source and Pull From a Donor

To complete this swap, you will need to source a complete 1.4 TSI drivetrain with all associated accessories which includes:
Engine – complete long block with all accessories, coolant hose, turbocharger, and engine wiring sub-harness
Transmission – Complete unit including the full clutch assembly with flywheel, shifter, and shifter cables. Previously swapped 02J MK1 may reuse their existing transmission provided the complete clutch assembly with the 02J flywheel is retained. If you keep your 02J transmission you must make sure to use 100mm output flanges which came with the diesel versions. (Reach out or leave a comment if you need help sourcing them)

Our flashed ECU includes an immobilizer delete, allowing us to simplify the swap without requiring all OEM vehicle components. This also means you can source these parts individually, rather than needing to purchase or locate a complete donor vehicle.

3.2 Swap Kit Components (Base Swap Kit Components and Links)

During the development stage of the 1.4T swap kit, we tried to optimize the platform as much as possible meaning we developed and documented more than not enough to help support the community into achieving this swap. The aftermarket fundamentals needed to achieve this swap includes: 
Engine Mounts – Side engine mount, side transmission mount, front snub mount, rear transmission mount with aluminum dogbone, complete graded hardware kit. (view Section 8 for diagrams)
Downpipe – bolts directly to the OEM turbo V-band, features an integrated flex pipe, and terminates in a 2.5-inch V-band connection with an extended outlet pipe for users looking to completely delete the emissions system.
ECU (GEN1 or GEN2) – immobilizer delete, comfort module delete, N80 delete, all unnecessary ancillaries disabled, hard cut rev limiter.
Wiring harness (GEN1 or GEN2) – built from scratch with new OEM connectors (no core needed), integrated fuel pump controller (PWM), tachometer output signal, OBD-II port, professional sleeving.
Low Pressure Fuel Pump – low pressure fuel pump is required to feed high pressure fuel pump. Our kit has been designed around the Bosch 044 pump.
DBW Gas Pedal – sends signal to the ECU activating throttle body position. Our kit has been designed around the MK4 gas pedal.
Radiator – while our in-house radiator solution is still being developed a standalone system is currently available at S&P Automotive. This option may require you to source or modify your coolant hose to connect the engine to the radiator.

3.3 Optional and Recommended Parts (Optimized Setup and Links)

While the core components listed above are all required to successfully complete the 1.4T swap, further optimization can be achieved by addressing supporting systems around the drivetrain. The following optional but recommended parts are intended to complement the swap kit, reduce common bottlenecks, and help builders extract the full potential of the 1.4T platform in a clean and well-integrated manner.
Engine Mount Inserts – reduce engine movement from OEM bushings without having harsh NVH from stiffer mounts.
Speedometer Stepper Motor – allows you to have a GPS speedometer with the 0A4 transmission. 
Oil Pressure and Temperature Sensor – splits OEM oil sensor port in 2 to have both oil pressure and oil temperature readings.
Clutch Cable Conversion Kit – keeping the MK1 OEM like system and remove failure points from modern day hydraulic systems.
Water to Air Coolant Reservoir – required when using the standalone cooler system.
Water to Air Cooler – separating the system from the engine’s primary cooling circuit minimizes heat soak and keeps intake air temperatures consistently lower, even during aggressive driving.

This section is dedicated to enthusiasts who appreciate the nitty-gritty details. Here, you’ll find comprehensive information on engine variants and specifications, transmission options, cooling system configurations and routing, fuel pump requirements, as well as electrical and wiring details. This section focuses on technical information, the step-by-step installation process is covered separately in Section 6

4.1 Engine

The 1.4T engine comes from Volkswagen’s EA211 engine family. While the 1.4L version is the most accessible and widely produced, the EA211 family actually includes 5 different engines, each designed with varying displacements, configurations, and applications across VW Group vehicles.

1L R3 – 12v inline-three variant ranging from 59-126bhp with engine codes: CHYA, CHYB, CPGA, CHZB, CHZD, CSEB, DHSB
1.2L TSI – 16v inline-four variant ranging from 84-109bhp with engine codes: CJZB, CYVA, CJZC, CJZA, CYVB, CJZD
1.4L TSI – 16v inline-four variant 109-148bhp with engine codes: CHPA, CMBA, CPVA, CPWA, CPVB, CUKB, CUKC, CXSA, CPTA, CZCA, CZDA, CZEA, CZTA, DGXA, DJKA, DJXA.
1.5L TSI EVO –16v inline-four variant ranging from 129-158bhp with engine codes: DACA, DACB, DADA, DFMYA, DPBA, DPBE, DPCA, DNKA, DXDB
1.6L MSI – 16v inline-four variant ranging from 89-109bhp with engine codes: CWVA, CWVB

While the EA211 family encompasses numerous engine codes, our swap kit is designed specifically for the 1.4L TSI variant. We have confirmed compatibility with the CZTA (GEN1) and CAXA/DJXA (GEN2) engines found in North America. Other EA211 variants may also be compatible, depending on their physical and electronic interfaces.

We have already made a video in the past on why we believe the 1.4T is the best option for the MK1 platform in the past, but here are some key features that makes this engine so attractive to us:
Bottom End Rotating Assembly – The crankshaft, connecting rods, and pistons are so precisely weight-balanced that a balance shaft is no longer required. In addition, the engine features a forged steel crankshaft, which significantly increases overall strength and durability. This robust bottom-end design suggests a high potential for further power upgrades without the typical concerns associated with crankshaft failure or premature wear.
Camshaft Design – The camshaft housing (also known as a valve cover) is constructed from cast aluminum and features integrated camshafts. On this platform, the camshafts are assembled directly into the camshaft housing itself, eliminating several traditional failure points. One drawback of this design is that camshaft upgrades are currently not possible on the EA211 platform. However, a major advantage is that all EA211 engines are equipped with continuously variable valve timing, offering up to 50° of adjustment on the intake side and 40° on the exhaust side. This wide adjustment range allows the engine to operate efficiently across various load and driving conditions.
Turbo Manifold Design – Compared to traditional turbocharged engines, this design integrates the exhaust runners directly into the cylinder head, merging them into a single central port that exits at the head where the turbocharger mounts. Eliminating a conventional external exhaust manifold reduces system complexity, minimizes heat, and significantly shortens the exhaust gas path to the turbocharger. At operating temperature, the close integration with the engine’s coolant circuit helps regulate exhaust gas temperatures, ensuring consistent energy delivery to the turbocharger, maintaining optimal spool-up response, and allowing the engine to operate closer to its target lambda. During cold starts, retained exhaust heat enables the engine to reach operating temperature more quickly, resulting in reduced fuel consumption, lower emissions, and faster cabin heating.
Cooling System – The cooling system works in close integration with the exhaust runners, providing multiple benefits including faster warm-up times, reduced fuel consumption, and lower exhaust gas temperatures. In addition, the 1.4T engine utilizes a water-to-air charge cooler instead of a conventional air-to-air intercooler resulting in a more compact packaging layout and improved throttle response. Further details on the cooling system are covered in Sections 4.3, 4.4, 6.6, 8.
Electric Vacuum Pump – This engine features an integrated electronic vacuum pump that connects directly to the brake booster supporting modern brake booster technology. It delivers consistent assisted brake pressures under full engine load ensuring safe and reliable braking in all conditions.

4.2 Transmission

The 1.4T engine was offered with a variety of transmission options from the factory, ranging from manual gearboxes to advanced DSG automatics. As of this writing, there are 5 known transmission variants released with the 1.4T:
DQ200 – 7-speed automatic dry clutch DSG transmission available in FWD only.
DQ250 – 6-speed automatic wet clutch DSG transmission available in both FWD and AWD configuration.
AQ300 – 8-speed automatic standard torque converter transmission available in FWD only.
02T (MQ200) – 5-speed manual transmission available in FWD only.
02Q (MQ250) – 6-speed manual transmission available in FWD only.

It’s important to note that our swap kit mounts were designed specifically around the factory 1.4T 5-speed manual transmission, listed on the product page as the 0A4 (officially 02T/MQ200). This transmission does not have a VSS output, so a speedometer solution is required; in our case, we found a GPS speedometer stepper motor to work reliably.

During development, we realized that the 02J transmission, a popular swap for the MK1 platform, shares very similar mounting points with the 0A4 and does include a VSS output. To support the community, we engineered our mounts to be compatible with both the 0A4 and 02J, giving MK1 enthusiasts who have already upgraded to the 02J the option to keep their existing transmission, further reducing the overall cost of the swap. When using the 02J transmission, it’s important to ensure it is equipped with the 100 mm output shafts from the diesel variants as these are required to bolt up to the OEM Mk1 axles. The 108 mm output shafts found on petrol versions are not compatible with this setup. You must also retain the complete 02J clutch assembly and flywheel for proper compatibility and operation.

At this time, we have not developed a solution for DSG transmissions, as our current focus is still on expanding 1.4T mount options for other platforms. This doesn’t mean DSG swap options are off the table entirely, future development may include them but they won’t be available until our other projects are further along.

4.3 Engine Cooling System
 In the EA211 engine family, the cooling system features a dual-circuit design that separates the cylinder block and cylinder head, allowing each to be managed at different temperatures. This is achieved through two distinct thermostats housed within the same thermostat housing. The cylinder head thermostat opens at 87°C (188.8°F) and higher, while the cylinder block thermostat opens at 105°C (221°F) and higher. Additionally, the engine’s cooling system incorporates a seamless HVAC integration with the OEM MK1 heater core system when using the 1.4T coolant squid (hose system), ensuring consistent thermal management for both engine performance and cabin comfort.

Having two different thermostat set points allows the engine to operate more optimally under various conditions. The higher temperature in the cylinder block reduces friction in the crankshaft group, improving mechanical efficiency, while the lower cylinder head temperature ensures better cooling of the combustion chambers. This targeted cooling strategy helps reduce knocking tendencies and supports consistent engine performance.

When swapping the 1.4T into a MK1 chassis, we recommend using a new radiator to maintain a clean engine bay since both the inlet and outlet are located on the same side unlike the conventional MK1 radiator, which has a cross-passage design. Using a supporting radiator allows most of the hoses from the donor 1.4T to be reused and modified (cut, rotated, or trimmed) to complete the coolant circuit. More details can be found in Section 6.6 and Section 8

4.4 Water to Air Cooling System
In a turbocharged engine, the turbo compresses intake air using exhaust energy, increasing both pressure and temperature. Higher intake temperatures reduce air density, lowering oxygen content and increasing the risk of knock. To optimize performance and protect the engine, it is important to lower intake air temperatures, typically through an intercooler or water-to-air cooling system, ensuring the air entering the combustion chamber is as dense and oxygen-rich as possible. This leads to better combustion, higher power output, and improved engine reliability.

Volkswagen’s 1.4T platform uses a water-to-air cooler located directly in the intake manifold. This design provides a shorter, more direct pathway from the turbocharger to the intake, reducing charge pipe length. While many in the aftermarket community replace it with an intercooler to lower intake temperatures under heavy load, we explored ways to retain the advantages of the water-to-air system.

After analyzing the coolant pathways, we discovered that the water-to-air cooling system is driven by an external water pump, separate from the main engine cooling system. However, it still shares the same coolant circuit, which likely contributes to higher intake air temperatures under heavy load. To address this, we fully isolated the water-to-air system so that engine heat no longer affects its performance. This was achieved by rerouting and blocking certain coolant pathways and adding a dedicated standalone cooler and reservoir for the water-to-air system.

Installing a standalone cooler requires a few additional steps but isn’t mandatory, however, it does improve performance in high-demand applications. Due to the limited space in the engine bay, a motorcycle radiator (39060-0710) can be used to support the standalone system. A suitable coolant reservoir is also required, which we achieved by modifying a universal expansion tank (‎KEENSODOG9A2EN6B) into an inline reservoir. More details can be found in Section 6.6 and Section 8

4.5 Fuel System

The 1.4T engine operates using direct fuel injection, a system that requires significantly higher fuel pressures to ensure proper mixture formation while reducing particulate emissions. To achieve this, the factory setup utilizes a dual-stage fuel system consisting of a low-pressure fuel pump located in the fuel tank and a high-pressure fuel pump mounted on the fuel rail.

The low-pressure fuel system operates within a 2–6 bar (29-87psi) range depending on engine load. Under normal driving conditions, fuel pressure typically remains between 2–5 bar (29-72psi), while cold-start operation requires elevated pressure in the 5–6 bar (72-87psi) range. The low-pressure pump supplies fuel directly to the engine-bay fuel filter, which incorporates an internal 6.6 bar (95 psi) fuel pressure regulator with a return line to the fuel tank ensuring a stable supply to the high-pressure system. Mounted on the fuel rail, the high-pressure fuel pump further amplifies this supply to meet direct-injection demands, operating in the 140–200 bar (2030-2900psi) range. Pressure is precisely controlled by the fuel pressure regulating valve to maintain optimal injection performance across all operating conditions.

The MK1 chassis does not come with an in-tank fuel sending unit so we developed an inline solution using the Bosch 044 fuel pump to replace the factory low-pressure pump system. To promote proper pump longevity and maintain OEM-style control, we retained a factory like fuel pump control module also known as the Pulse Width Modulation (PWM) module which regulates pump output based on real-time engine demand. More details can be found in Section 6.5 and Section 8

4.6 Wiring Harness

To support the community with a complete plug-and-play swap solution, we developed a fully custom wiring harness built entirely from scratch, using all brand-new OEM-quality connectors, no donor harnesses or cores required. Some key features are:
Engine Fuse Box – ECU, Coil, Valve, O2 and OBD-II
Relay Box – Required relays and vacuum pump relay
Low Pressure Fuel Module – OEM Volkswagen pulse module to ensure longevity on the 044 pump
Tach Adapt Module – Ensures proper RPM output for the cluster
OBD-II Plug – For user friendly diagnostics
MK4 Drive-by-Wire (DBW) Plug – Enables you to connect a DBW pedal without having to cut the firewall

To install our harness, a small number of wires (labeled) must be spliced in to properly input and output the required signals between the chassis, powerplant, and ECU. To give the end user maximum flexibility, we equipped this harness with more options than strictly necessary. While not every wire is required for basic operation, we strongly recommend utilizing all available inputs and outputs to ensure full functionality, safety, and OEM-like integration. More details can be found in Section 6.4 and Section 8

4.7 Miscellaneous Information and Stats

Located below, you’ll find detailed breakdown of additional information, technical specifications, and relevant part numbers. This section is intended to provide further clarity and support.

Engine Specifications
Displacement – 1395cm³
Bore – 74.5mm
Stroke – 80mm
Valves per Cylinder – 4
Compression Ratio – 10.5:1
Oil Pressure – 3.3bar (47.86psi)

Engine Accessories and Sensors
MK4 DBW Pedal – OEM Volkswagen (1J1 721 503J)
Alternator Belt – OEM Volkswagen (04E 145 299K)
Accessory Belt Tensioner – OEM Volkswagen (04E 145 933N)
Oil Temperature Sensor – OE Replacement (049 919 563A)
Coolant Temperature Sensor – OE Replacement (049 919 501)
Upstream O2 Sensor – OEM Volkswagen (04E-906-262-EE)

Water to Air Cooler Hardware, Hose and Fittings
Cooler – 13-17 Kawasaki EX300 (39060-0710)
Reservoir – 2.5L universal overflow tank (KEENSODOG9A2EN6B)
V188 Pump (water to air pump) Hose – 3/4” hose
Water to air cooler Hose – 5/8” hose
Radiator Hose – 5/8” hose
(Turbo water lines relocation?)

Fuel System Hardware, Hose and Fittings
Low Pressure Pump – Bosch 044 (0580254044) or equivalent (6.6bar (95psi), 110 LPH minimum)
Fuel filter – OEM Volkswagen (1K0 201 051K) or equivalent (H280WK)
Clamp for fuel injection – 5/16” x 10unit
Barb adapters – M12 to 5/16” barb x 1unit / M18x1.5 to 5/8” barb x 1unit
Cap nut – M12x1.5 x 1unit
Fuel lines – 8mm ID high pressure hose Gates (4219-5652) or equivalent
Mount – 60mm fuel pump clamp / 55mm fuel filter clamp

Wiring Harness Input/Output/Connectors
OEM ECU Plug – Plugs directly into your the ECU
1.4T Engine Harness Plug – Plugs directly into the OEM 1.4T engine sub-harness
O2 Sensor Plug – Plugs directly into OEM O2 sensor
Alternator Plug – Plugs directly into OEM 1.4T Alternator
MK4 DBW Plug – Plugs directly into MK4 DBW pedal harness
OBD-II Port – Plug in OBD scanner or real time data software
12V Wire – Splice in to feed power
Ground Wire – Splice in to ground
Key On Wire – Splice in to activate features
Alternator Light Wire – Splice in to enable battery light feature
Brake Signal Wire – ___________________________
Oil Pressure Light Wire – Splice in to enable oil pressure light
Tach Adapt Wire – Splice in a coil pack to enable RPM reading
Tach Output Wire – Splice in tach to enable RPM reading
Clutch Switch Wire – Wire to clutch switch to enable clutch switch functions
12V Low Pressure Fuel Pump Wire – Wire to power inline low pressure fuel pump
Ground Low Pressure Fuel Pump Wire – Wire to ground inline low pressure fuel pump

Preparation is always key when aiming for the best results, and engine swaps are no exception. This section of our wiki is dedicated to guiding you through the essential and recommended tools needed to complete this swap efficiently and safely. Whether you’re a seasoned builder or tackling your first major project, having everything organized and accessible will save you time, prevent frustration, and help ensure the installation goes smoothly.

5.1 Required Tools

This section is divided into two parts: preparation and installation. Here, you’ll find the tools required to complete the swap. We also recommend referring to Section 5.2 for a full list of suggested tools to make the job easier.
Preparation Stage Required Tools:
- Flat head screw driver (to pry with)
- Cutters (to cut coolant hoses)
- Pliers (to remove clamps)
- Ratchet (to remove bolts)
- Torx T30 (for the removal of the coolant hard pipes, secondary air pump, air box adapter, timing belt cover, engine mount)
- 10mm 12 point driver (for the removal of the secondary air pump, OEM tensioner, OEM downpipe support bracket)
- 13mm socket (for the removal of the A/C unit, alternator)
- 16mm socket (for the removal of the OEM engine mount, accessory belt)

Installation Stage Required Tools:
Coming soon

5.2 Recommended Tools

This section highlights recommended tools to help make the swap process easier. It is divided into two stages: preparation and installation.
Preparation Stage Required Tools:
Pry bar (for more leverage)

Installation Stage  Required Tools:
Coming soon

A successful installation begins with understanding the process from start to finish. This section of our wiki is designed to walk you through each step of the swap, providing clear instructions and practical tips to make the job easier and more efficient. Following a structured approach will help you avoid common pitfalls, reduce errors, and achieve professional results. Taking the time to familiarize yourself with the workflow ensures that each stage of the installation is handled with confidence.

6.1 Engine Removal (MK1 Platform)

Coming soon

6.2 Engine Preparation

Once you’ve sourced your donor engine, we recommend going through and stripping down the coolant and vacuum lines to ensure everything is in good condition. Since this is a swap application, several coolant lines will need to be deleted or modified, along with some vacuum lines, to simplify the setup and make it easier to work on and diagnose. It’s best to handle this prep before dropping the engine in, while access is still wide open.

6.3 Mounting the 1.4T Engine

Coming soon

6.4 Wiring & ECU
Coming soon

6.5 Fuel System Modifications
Coming soon

6.6 Cooling System
Coming soon

6.7 Turbo & Exhaust Fitment

Coming soon

Starting your engine for the first time is a critical moment, and careful preparation can make all the difference. This section of our wiki is dedicated to guiding you through the essential steps and checks before firing up your swap. Following these guidelines will help prevent damage and give you confidence that your installation is ready for the road. Taking the time to do it right the first time sets the foundation for a smooth-running engine and long-term performance.

7.1 Post-Swap Checks

Coming soon

7.2 Common Issues & Fixes

Coming soon

Visual references are an invaluable part of any installation or build process. This section of our wiki compiles detailed photos and diagrams to guide you through each component, connection, and step of the swap. Each attached file is linked to an explanatory text listed above for easy reference.

Mount kit and hardware:

Before and after dyno graph tune on a stock 1.4T:

Fuel system routing:
Water-to-air coolant routing:

External water-to-air cooler routing:

Turbo line routing:

We’re currently putting together a comprehensive checklist to guide you through this swap from start to finish. It will cover all the required OEM parts, optional and recommended components, as well as the tools you’ll need to ensure a smooth, hassle-free process with no surprises along the way.

What are the meaning of the used abbreviations?
FAQ – Frequently asked questions
DBW – Drive-by-wire
VSS – Vehicle speed sensor
OEM – Original equipment manufacture
OE – Original equipment