TorqFix

Polo4 1.4/1.6 (BAH,BLM) — VW

Polo4 1.4/1.6 (BAH,BLM) on VW: 71 steps, engines BAH, BLM. What to remove, in what order, and what to check after.

Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.

71 steps 2 engine codes

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform codes 1.4, |, 1.6

Don't miss

  • Always fit a new timing belt after removal
  • Do not disconnect the cooling circuit

🔧 Engine codes this applies to

BAHBLM

📐 38 workshop diagrams for BAH

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 1
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 2
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 3
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 4
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 5
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 6
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 7
Polo4 1.4/1.6 (BAH,BLM) — BAH · diagram 8
+ 30 more diagrams
🔒 38 workshop diagrams for this job Ask about your VW BAH — free or sign up free to see the drawings

📋 Procedure

Preparation and removal

  1. Before disconnecting the battery cable, check the audio system security code
  2. Always fit a new timing belt after removal
  3. Remove the engine cover
  4. Remove the air filter housing
  5. Remove the front right wheel
BAH? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove the ancillary drive belt
  2. Remove the exhaust manifold heat shield
  3. Stage 1:
  4. Remove the ancillary drive belt tensioner
  5. Use new bolts
  6. Remove the timing belt lower cover
  7. Remove the engine support bracket (to the cylinder head)
  8. Loosen the tensioner pulley bolt
  9. Remove the timing belt

Installation and checks

  1. Check the tensioner and idler pulleys; renew if necessary
  2. Check the belt(s) for cracks, fraying, wear and oil contamination
  3. Align the marks on the tensioner
  4. Stage 1:
  5. The tension is set if the marks are aligned
  6. Crankshaft pulley
  7. Fit the crankshaft pulley
  8. Note: Do not disconnect the cooling circuit
  9. Refit the engine support
  10. Refit the coolant reservoir
  11. Refit the heat shield
  12. Fit the ancillary drive belt
  13. Refit the wheel arch cover lining
  14. Refit the front right wheel
  15. Refit the air filter
  16. Refit the engine cover
Workshop diagrams

Ask TorqFix about your VW BAH — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your VW BAH — free → or sign up free to see the drawings

Other VW 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.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.