Description
Engineered by INA (a leading original equipment manufacturer under the Schaeffler Group), the INA Electronic Throttle Body for VW AUDI is a precision-manufactured Drive-by-Wire (DbW) air intake control module built specifically for Volkswagen Group (VAG) engines. Serving as a direct-fit replacement for worn or malfunctioning factory throttle bodies, this assembly integrates a high-torque DC servo motor, a heavy-duty micro-gear drivetrain, a dual-circuit contactless position sensor, and a CNC-contoured throttle plate within an OE-spec aluminum housing. Fully compatible with Bosch ME/MED and Siemens Simos Engine Control Units (ECUs), it responds instantaneously to pedal inputs to optimize air-fuel mixing across idling, turbo-boost, and overrun conditions. Built to eliminate the notorious “EPC Light” illuminated faults, erratic idling, and acceleration dead spots common to aging VAG vehicles, this INA assembly delivers original factory driveability, fuel economy, and emission compliance. It is an indispensable stock item for Euro-specialist repair facilities, engine reconditioners, and VAG auto parts importers globally.
Technical Parameters
| Category | Specifications & Technical Details |
| VAG-Specific 6-Pin Connector & Dual Non-Contact TPS | Integrates a 6-pin sealed connector fully matching Volkswagen Audi OEM wiring harnesses, with built-in dual-channel Hall effect position sensors (TPS 1 & TPS 2). The sensors have no physical friction contacts, transmitting throttle opening feedback signals linearly to the ECU in real time, with signal synchronization error maintained within ±0.5%. This solves EPC warning light illumination and P0121 / P0221 fault codes at the source caused by carbon-film contact wear. |
| High-Speed DC Servo Motor & High-Strength Reduction Gear Train | Specifically engineered for the intake pressure fluctuation characteristics of VAG turbocharged engines (TSI / TFSI). Internally matched with a high-torque DC servo motor and wear-resistant reduction gears. Completes full-closed to full-open action in under 45 ms, completely resolving throttle lag in VW / Audi vehicles when the pedal is pressed, ensuring instant power response during standing starts and mid-range overtaking. |
| VAG Fail-Safe Dual Spring Architecture & Limp-Home Mode | Internally contains two independently pre-loaded steel mechanical return springs. When encountering vehicle network communication interruption or electronic control failure, the spring mechanism forces the throttle plate back to the preset 6° Limp-Home Position mechanical safety angle within milliseconds. This allows the vehicle to drive away from dangerous areas at extremely low speed, preventing unintended surging caused by a fully open throttle. |
| CNC-Machined Air Bore & Precision Idle Sealing Performance | The throttle body intake bore inner wall and brass / aluminum alloy throttle plate outer edge are CNC high-precision ground, with plate closure clearance achieving micron-level precision. Parasitic air leakage under idle conditions is controlled below 1.2 kg/h, ensuring no shaking during cold start of VW / Audi gasoline and diesel engines, and eliminating idle surge caused by air leakage. |
| Robust Die-Cast Aluminum Housing & IP6K9K Environmental Protection | The housing is manufactured from die-cast aluminum with the same thermal expansion coefficient as VW / Audi aluminum alloy intake manifolds. The motor and electronic cover plate feature IP6K9K-rated protection architecture. Perfectly resists oil vapor and carbon deposit corrosion from exhaust gas recirculation (EGR) and crankcase ventilation (PCV) backflow. Withstands extreme temperature differentials from -40°C to +140°C in the engine bay. |
Applicable Car Brands & Models
On Volkswagen and Audi vehicles, the EPC (Electronic Power Control) light indicates a glitch in the drive-by-wire engine management system. When the ECU detects a voltage mismatch between TPS 1 and TPS 2 sensor signals inside the throttle body, or if the electric motor struggles against carbon buildup, the ECU throws an EPC light and restricts engine power to protect the drivetrain.
Yes, absolutely. After replacing the throttle body on any VW or Audi, a basic setting alignment (Group 060 in VCDS/ODIS or via a diagnostic scan tool) must be performed with the ignition ON and engine OFF. This process calibrates the ECU to the mechanical minimum (0%) and maximum (100%) stops of the new throttle body. Failing to do this may cause high idling, rough idling, or a persistent EPC light.
Depending on the specific kit packaging, the INA Electronic Throttle Body is supplied with or designed to pair perfectly with the OE-grade rubber sealing ring. It is strongly recommended to replace the green/black rubber sealing gasket between the throttle body and the intake manifold during installation to avoid vacuum leaks.
Each INA Electronic Throttle Body for VW AUDI is packed in a protective, original Schaeffler INA branded box, secured with anti-static bubble wrap and a protective plastic cap on the electrical connector pins. For B2B export orders, minimum order quantities generally start at 5 to 10 units per part number, with palletization options for bulk distributor orders.
