Emissions
Secondary air injection (smog) pump replacement: what it costs
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $150 | $700 |
| Labor: 1 to 2.5 hours × $110 to $150 an hour | $110 | $375 |
| Fees: shop supplies, disposal, diagnostics | $0 | $25 |
| Total, rounded | $260 | $1,100 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
The air pump blows fresh air into the exhaust at startup to cut emissions. A failed one sets codes and can fail an emissions test.
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What is usually included
- New air pump
- Check valves and hoses
- Clear codes
- Test the system
What moves the price
- Pump brand
- Combination valve and hose replacement
- Pump location, front or lower engine bay
- Water damage or corrosion
Questions to ask before you say yes
- Was the pump or the valve the problem?
- Are check valves replaced?
- Is it a recall or warranty item?
- Is the system tested after repair?
Can you do it yourself?
A moderate DIY; the main risk is damaged hoses and valves that have rusted in place.
Shopping for the part? Search car parts on eBay (affiliate link, disclosure). Make sure the part fits your car before buying.
Common questions
What does the pump do?
It adds air to the exhaust for the first few minutes after a cold start so the catalytic converter heats faster.
Can I drive with a bad one?
The car will usually run fine, but the check engine light will stay on and an emissions test may fail.
Why is the cost so wide?
Some pumps are cheap and easy to reach, while others cost a lot and sit behind other parts.
How much does secondary air injection (smog) pump replacement cost?
A typical range across the US is $260 to $1,100. That is an estimate from parts prices, labor hours and the local labor rate, not a quote.
Typical range in 10 metro areas
Only the labor rate changes between cities. Same parts, same hours.
| Area | Typical range, estimate |
|---|---|
| Boston area, Massachusetts | $270 to $1,175 |
| New York City area | $270 to $1,150 |
| Los Angeles area, California | $270 to $1,150 |
| Chicago area, Illinois | $260 to $1,125 |
| Houston area, Texas | $250 to $1,100 |
| Dallas-Fort Worth area, Texas | $250 to $1,100 |
| Phoenix area, Arizona | $260 to $1,100 |
| Atlanta area, Georgia | $260 to $1,125 |
| Miami area, Florida | $250 to $1,100 |
| Seattle area, Washington | $270 to $1,150 |