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Fitting location on radiator cowl — AUDI

Fitting location on radiator cowl on Audi: 13 steps, engines CDBA, CDCA, CNEA, CNFA. What to remove, in what order, and what to check after.

Despite its title, this job is the removal and refitting of continued coolant circulation pump V51, mounted at the radiator cowl, on the vehicles under the platform codes listed below (S1, 2H) with the four-cylinder diesel engine codes shown. Access is from underneath once any underbody guard is off. The two coolant hoses on the pump are pinched with hose clamps 3094 before the spring-type clips are released, which keeps coolant loss to a dribble you can catch with a cloth. The pump is unbolted, the wiring harness clip at the bracket is released and the connector unplugged. Fitting is the same in reverse. What matters most is clamping the hoses before opening anything and topping up and checking the coolant level at the end, since any air or loss shows up later as poor heating.

13 steps 6 engine codes

🧭 Before you start

Remove the underbody guard if fitted. Pinch both coolant hoses with clamps 3094, release the spring clips and pull the hoses off V51, catching coolant with a cloth. Unbolt the pump, free the harness clip at the bracket and unplug the connector. Fit the new pump with its bolts, refit the hoses with spring clips, plug in and secure the wiring, refit the guard and check the coolant level.

Fits: platform codes S1, 2H

  • Special tools named: 3094

Don't miss

  • Clamp both hoses with 3094 before releasing the clips to limit coolant loss.
  • Refit spring-type clips correctly; do not substitute worm-drive clips.
  • Re-secure the wiring harness to its bracket so it cannot chafe.
  • Check and correct the coolant level after the pump is installed.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

CDBACDCACNEACNFACNFBCSHA

📋 Procedure

  1. Remove underbody guard, if fitted General body repairs, exterior66Underbody guard.
  2. Pinch off coolant hoses (1 and 4) with hose clamps, up to 25 mm dia.3094.
  3. Remove coolant hoses (1 and 4) from continued coolant circulation pump V51. To do this, loosen spring-type clips.
  4. Collect escaping coolant with a cloth.
  5. Unscrew bolts (2) and remove continued coolant circulation pump V51.
CDBA? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Loosen clip (2) for wiring harness (1) at bracket (3).
  2. Disconnect connector (4) at continued circulation coolant pump V51.
  3. Install continued coolant circulation pump V51(3) and secure with bolts (2).
  4. Tighten bolts (2).
  5. Secure coolant hoses (1 and 4) to continued coolant circulation pump V51(3) using spring-type clips.
  6. Clip connector onto continued circulation coolant pump V51 and secure wiring harness to bracket.
  7. Install underbody guard, if fitted previously General body repairs, exterior66Underbody guard.
  8. Check coolant level .

Other AUDI procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

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Workshop data on this page last updated 20 Sep 2026.