Car repair costs in Illinois: shop rates, labor and parts
Illinois sits almost exactly on the national middle for shop rates, and its Automotive Repair Act treats an itemized estimate differently from a single total price.
Water pump, SUV, Illinois: typical cost
$193
Range $146 to $253 · pump · before sales tax
| Labor time, SUV | 1 h |
| Shop rate, Illinois | $115 to $160 per hour |
| Labor, typical | $135 |
| Parts, typical listing | $58 |
Compiled by Radif Partners · How costs are estimated · Illinois technician wages, May 2025 · not a quote
Illinois technicians earned a mean $27.25 an hour in May 2025, a hair above the national $27.13, so the posted shop rate scaled from that wage is about $135 an hour, practically the national $134, with a band of $115 to $160. On that measure the state is 20th highest of 51 jurisdictions. A water pump on an SUV comes to about $193 against $192 at the national rate, and a starter on a sedan about $239 against $238; a sedan battery is about $236 fitted. Those near-identical pairs mean the national cost pages on this site already describe Illinois well. What is specific to the state is the paperwork: from $100 you are entitled to a written estimate, and how far the final bill may drift from it depends on whether the estimate breaks out parts and labor.
A rate at the national middle
About 29,500 automotive technicians work in Illinois according to the federal wage survey, and their mean pay is within 0.4 % of the national figure. Because the site scales the national band of posted rates by that wage ratio, the Illinois band is almost the national one. The average blends two different markets: shops in Chicago and its collar counties may face higher costs than those downstate, so treat the band as the statewide middle rather than your neighborhood price. The simulator below runs a single repair through every state for comparison.
One repair in every state
Water pump, SUV: national typical cost
$192
| Labor time | 1 h |
| Lowest state | West Virginia, $163 |
| Highest state | District of Columbia, $220 |
The written estimate from $100
Under the Illinois Automotive Repair Act, a repair expected to cost $100 or more entitles you to a written estimate, unless you waive it or never deal with the shop face to face. The Act leaves out collision work, jobs under that amount, and merchandise installed at a firm price without any diagnosis(Illinois Attorney General, Automotive Repair Act).
The detail that matters most is the form of the estimate. If it is itemized, with parts and labor on separate lines, the shop may go up to 10 % over it without asking; beyond that it needs your oral or written approval. If it only gives one total price, the shop may not exceed it at all without approval. An itemized estimate is easier to check, and the estimate checker needs exactly those lines: hours, rate and parts. The Attorney General's office takes complaints under the Act.
Emissions testing in two regions
Emissions testing applies only to vehicles registered in the Chicago area and in the Metro-East region near St. Louis, the two areas that do not meet the federal ozone standard (Illinois EPA, vehicle emissions testing). A car registered elsewhere in the state is not tested. For the national context of the hourly rate, see mechanic labor rates.
Illinois repair costs, repair by repair
| Repair | Sedan | SUV | Pickup | Luxury |
|---|---|---|---|---|
| Brake pads | $112 | $159 | $192 | $225 |
| Pads and rotors | $218 | $273 | $295 | $304 |
| Water pump | $226 | $193 | $305 | $534 |
| Head gasket | $937 | $1,746 | $1,845 | $1,858 |
| Battery | $236 | $232 | $256 | $259 |
| Catalytic converter | $388 | $556 | $513 | $828 |
| Alternator | $308 | $373 | $297 | $457 |
| Timing belt | $613 | $613 | $646 | $599 |
| Oil change | $97 | $101 | $95 | $103 |
| Alignment | $67 | $88 | $81 | $88 |
| Transmission | $891 | $796 | $1,195 | $1,215 |
| A/C recharge | $67 | $67 | $67 | $67 |
| Starter | $239 | $229 | $212 | $264 |
Illinois rules at a glance
| Rule | Illinois |
|---|---|
| Repair law | Automotive Repair Act (815 ILCS 306) |
| Written estimate | Consumers are entitled to a written estimate for repairs costing $100 or more unless waived or there is no face-to-face contact. The Act does not apply to collision repairs, repairs under $100, or merchandise installed for a firm price without diagnosis (Attorney General summary). |
| Threshold | $100 |
| Your consent before the bill exceeds the estimate | With an itemized estimate (parts and labor separated) the shop may not exceed it by more than 10% without oral or written authorization; with a non-itemized total-price estimate it may not exceed it at all. |
| Replaced parts returned on request | not read for this state |
| Shop registration | not read for this state |
| Safety inspection | not read for this state |
| Emissions testing | Emissions testing only for vehicles registered in the Chicago and Metro-East St. Louis ozone nonattainment areas (Illinois Vehicle Emissions Inspection Law of 2005, 625 ILCS 5/13C). |
| CARB-approved converter required | not read for this state |
| Sales tax on repair labor | not read for this state |