Car repair costs in Missouri: shop rates, labor and parts
Missouri still sends cars past their exemption to a safety inspection every other year, and adds an emissions test around St. Louis.
Catalytic converter, SUV, Missouri: typical cost
$543
Range $324 to $894 · one converter · before sales tax
| Labor time, SUV | 1.3 h to 2.6 h |
| Shop rate, Missouri | $109 to $152 per hour |
| Labor, typical | $251 |
| Parts, typical listing | $292 |
Compiled by Radif Partners · How costs are estimated · Missouri technician wages, May 2025 · not a quote
Missouri technicians earned a mean $25.94 an hour in May 2025, under the national $27.13, and the shop rate scaled from that wage is a typical $129 an hour, with the middle half of posted rates between $109 and $152. Ranked from the cheapest, the state is 16th of 51 jurisdictions. A catalytic converter on an SUV comes to about $543 against $554 at the national rate, and front pads and rotors on a pickup to about $290 against $294. A water pump on a sedan is about $218. Missouri keeps a safety inspection every two years for cars past the exemption, tests emissions in the St. Louis area, has no statute written for repair estimates and leaves separated labor out of the sales tax.
A rate below the national middle
The Bureau of Labor Statistics wage survey counts about 17,200 automotive technicians in Missouri, earning 4 % less than the national mean. The site scales the national band of posted rates, whose middle is $134, by that ratio, without a survey of Missouri shops. Kansas City and St. Louis shops may post above the band, small-town shops in the Ozarks below it. When you know your shop's rate, put it in the estimator.
Any Missouri repair, your vehicle
Catalytic converter, SUV, Missouri: typical cost
$543
| Labor time, SUV | 1.3 h to 2.6 h |
| Shop rate, Missouri | $109 to $152 per hour |
| Labor, typical | $251 |
| Parts, typical listing | $292 |
The safety inspection is still the law
Missouri's statute still requires a safety inspection every two years, timed by model year: even model years in even calendar years, odd ones in odd years (Revised Statutes of Missouri, section 307.350). A vehicle within ten years of its model year and with fewer than 150,000 miles is exempt, as are historic vehicles and a few other categories. In practice, older or high-mileage cars are the ones that go through the check. The pads and rotors page prices that common case for every vehicle type.
The Gateway Vehicle Inspection Program adds an onboard diagnostic emissions test for 1996 and newer vehicles in the City of St. Louis and in St. Louis, St. Charles, Jefferson and Franklin counties. A federal EPA-compliant converter is acceptable in Missouri, since the state has not adopted the California standard (U.S. EPA aftermarket converter policy).
No repair act: get it in writing yourself
Missouri has no law written for auto repair estimates. Shops answer only to the general ban on deception and unfair practices in the Merchandising Practices Act (Revised Statutes of Missouri, section 407.020), which sets no threshold, no overrun margin and no consent rule. That leaves the paperwork to you. Ask for a written estimate with the hours, the rate and each part, say that any extra work needs your approval first, and keep the paper. The estimate checker then reads each line against the Missouri band.
Sales tax on the bill
Repair labor stated apart from the parts is not taxable in Missouri. If the invoice lumps everything together, the whole price is taxed, unless the parts make up less than 10 % of the total (Missouri Code of State Regulations, 12 CSR 10-103.600). An itemized invoice keeps the tax on the parts alone.
Missouri repair costs, repair by repair
| Repair | Sedan | SUV | Pickup | Luxury |
|---|---|---|---|---|
| Brake pads | $108 | $153 | $185 | $217 |
| Pads and rotors | $213 | $267 | $290 | $300 |
| Water pump | $218 | $187 | $293 | $520 |
| Head gasket | $900 | $1,672 | $1,771 | $1,779 |
| Battery | $232 | $229 | $252 | $255 |
| Catalytic converter | $381 | $543 | $504 | $816 |
| Alternator | $305 | $366 | $293 | $450 |
| Timing belt | $592 | $592 | $624 | $579 |
| Oil change | $95 | $98 | $93 | $101 |
| Alignment | $64 | $84 | $77 | $84 |
| Transmission | $848 | $758 | $1,137 | $1,157 |
| A/C recharge | $64 | $64 | $64 | $64 |
| Starter | $233 | $223 | $207 | $259 |
Missouri rules at a glance
| Rule | Missouri |
|---|---|
| Repair law | Missouri Merchandising Practices Act (general law; Missouri has no auto-repair-specific estimate statute) (RSMo 407.020) |
| Written estimate | No state law requires a written estimate for auto repair. Shops are covered only by the general ban on deception and unfair practices in RSMo 407.020. |
| Threshold | not read for this state |
| Your consent before the bill exceeds the estimate | No statutory tolerance or consent rule. |
| Replaced parts returned on request | not read for this state |
| Shop registration | not read for this state |
| Safety inspection | Still required; it has not been repealed. Safety inspection every 2 years (even model years in even calendar years, odd in odd), under RSMo 307.350. Exempt: vehicles under 150,000 miles within 10 years of their model year, historic vehicles, and some others. |
| Emissions testing | Gateway Vehicle Inspection Program: OBD testing of 1996 and newer vehicles in the City of St. Louis and St. Louis, St. Charles, Jefferson and Franklin counties (10 CSR 10-5.381; RSMo 643.303). |
| CARB-approved converter required | No |
| Sales tax on repair labor | No |