The cost to fix a vacuum leak in a car typically ranges from $150 to $800+, with the national average falling between $200 and $500. The final price depends heavily on two factors: the cost of diagnostic labor to find the leak and the price of the specific failed component that needs replacement.
Diagnosing the issue is often the most time-consuming part. A mechanic uses a smoke machine to pinpoint the exact source of the leak, which can take an hour or more of labor. Once found, the repair cost is determined by the part itself. Simple, accessible components like a vacuum hose are inexpensive, while complex parts like an intake manifold gasket are far more costly due to the extensive labor required for replacement.
The table below outlines common repair scenarios to give you a realistic expectation of potential costs.
| Repair Scenario | Part Cost (Approx.) | Labor Time (Hours) | Total Estimated Cost |
|---|
| Single, accessible vacuum hose replacement | $20 - $50 | 0.5 - 1 | $100 - $200 |
| Faulty brake booster hose | $50 - $150 | 1 - 1.5 | $175 - $300 |
| Leaking intake manifold gasket | $100 - $300 | 2 - 4 | $400 - $800 |
| Failed Positive Crankcase Ventilation (PCV) valve | $30 - $75 | 0.5 - 1 | $120 - $225 |
| Replacement of vacuum control solenoid | $80 - $200 | 1 - 1.5 | $200 - $350 |
Ignoring a vacuum leak is not advisable. It can lead to a rough idle, poor acceleration, reduced fuel economy, and even damage to oxygen sensors or the catalytic converter over time, resulting in a much more expensive repair bill.
