A rule this site holds itself to: figures appear only when we can verify them against a primary source, and repair pricing for the whole VW group fleet across UK garages has no such source. Aggregator estimates move with parts pricing, model and region, and copying them here would launder guesses into facts. So this page gives you the structure of the bill, which is stable, rather than numbers, which are not.
Diagnosis is its own line
Most garages bill an initial diagnostic session separately from the repair: reading codes OBD-Codes, testing the implicated circuit, confirming the component. If the quote you receive does not separate diagnosis from repair, ask; you want the code list either way, because it travels with you to any second quote.
Cheap end versus expensive end
| Cause | Cost profile |
|---|---|
| Brake light switch | The classic cheap fix: a small part and modest labour. The outcome every EPC-light owner hopes for |
| Pedal or airflow sensor | Moderate: sensor cost plus access labour, varying by engine |
| Wiring repair | Unpredictable: the part is cheap, finding the chafe is the labour. Intermittent faults cost more to chase |
| Throttle body | Upper end: a significant component, sometimes salvageable by cleaning and adaptation, which is worth asking about before replacement |
| ECU fault | The expensive outlier, and mercifully the rarest of the common causes |
Keeping the bill down
- Get the codes read before authorising parts: replacing a throttle body to cure a brake switch code is a real and avoidable story.
- Ask whether cleaning and re-adaptation is viable before throttle body replacement.
- Take the code list to a second independent quote for anything beyond the cheap tier.
Whether the car should be driven at all while you arrange this is on safe to drive.