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Freeman Alignment
- Suspension
- Ethic
- Job
“It is rare to find a honest mechanic, and John/company exemplify the highest level of customer service, business ethics, and really know what they are doing!”
Car Tune-Up in Janesville, WI
24 technicians listed · 5 in Janesville · 10 open weekends · 23 rated 4.5+
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PS Auto Glass / Maxxed Out Motorsports
- Turbo
- Fair
- Truck
“Marshall was quick, did quality work, and was very good at translating what he saw and what he thought about it into information that made sense to the layperson.”
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K W Truck Auto Repair
- Prices
- Mechanic
“Ken has been a mechanic for over 30+ years.”
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Rock Diesel
- Truck
“Rock diesel wasn't able to repair me in such short notice, but they were knowledgeable with my diesel problem and helped diagnose a solution over the phone.”
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CTR Automotive Service South
- Fair
- Towed
- Honest
“Above and beyond, my vehicle was diagnosed and serviced quickly, and I was kept informed and up-to-date about what was happening to my truck from the beginning to end.”
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Street Performance Mufflers & Brakes
“Jr & Jesus helped me out in a matter of seconds i literally wasn't even there 30 min I was out these guys are kind, professional, and respectful, highly recommend they are consistent and efficient.”
Area overview: Janesville, WI
Of the 24 technicians we list here, 5 are in Janesville itself and 19 come from towns including South Beloit (5, 13 mi), Beloit (3, 10 mi) and Afton (1, 7 mi). The technicians on this page are rated from 4.3 to 5.0 across 2,862 reviews; 11 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (93%), quality (83%) and punctuality (69%). The topics that come up most in reviews of the technicians on this page are "price", "fair" and "honest". 10 are open on Saturdays and 1 on Sundays. 1 lists staff certifications (ASE) and 4 have a BBB rating of A or A+. Domain records put 7 websites of the technicians on this page at ten or more years old; the oldest dates from 1997. 2 offer financing; 2 give free estimates; 4 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 14 of the technicians on this page; 10 publish a contact page; 8 list a public email and 1 takes bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Data verified October 9, 2026
Listed for drivers in and around Janesville, WI, these 24 shops handle tune-up work and running faults. What each one says about diagnostics, warranties and service specials comes from its own website; ratings and quotes come from public reviews.
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High Velocity Diesel Performance
- Work
- Job
- Powerstroke
“There communications and documentation was outstanding and there was never a question about what needed to be done to my Excursion after they got into the engine based on the documentation.”
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Road Medic
- Engine
- Mechanic
- Prices
“He was able to repair a very stubborn engine misfire my wife and I experienced with our '04 Tahoe, and it now runs better than it did before the misfire appeared!”
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De-Denter Shop
- Job
“He also explained to us some information about our insurance that we were unaware of for an accident on another vehicle we have, and that we are waiting for information on.”
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Ace Auto Sales & Mechanic
- Auto Mechanic
- Price
- Vehicle
“I've tried other mechanics and everytime they "fix" the problem, it ends up coming back and I have to bring my vehicle back in to fix the same problem.”
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Real's Auto Repair
“If you want a great mechanic go here and the prices are way beyond reasonable same quality you get at the dealership but a better outcome on your pockets”
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South Beloit Auto Repair
“We had a car emergency on a long trip away from home, when we called asking for help they were able to see the car right away and do a temporary fix to at least get us back on the road home.”
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DC Auto Repair & Towing Service
- Price
“Very good”
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Best Test Auto Electric
“Fast, fair, experienced.”
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South Beloit Lube
“Appreciate Andrew and his guys…thank you again”
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C & G Auto Repair
“Great service”
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S & H Automotive
“Great mechanics”
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Dimaggio Auto
- Oil
- Communication
- Fair
“They did a full inspection of my car free of charge with pictures and they listed out everything that's in working order, what things need to be fixed in the future, and what things need my immediate attention.”
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Nelson's Imports
- Understanding
- Light
- Mechanic
“Ryan and his team treat you like family and they make sure everything is well explained making the customer feel very secure and pleased with their decision to use Nelson's.”
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Dan's Diesel Performance
- GMC
- Chevy
- Trans
“Update to my 100% satisfied customer note here but currently had a fuel pressure issue and it was with a cp3 conversion and come to find out i had 2 wires crossed.”
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Tilford's Towing and Recovery LLC Automotive Repair
“These guys were quick, the inside of the truck was 1000x cleaner than most of the tow trucks I've seen and been in, our driver was nice and very professional and most of all they were very reasonably priced.”
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Griffin Chrysler Dodge Jeep RAM Service Department
- Truck
- Dealership
- Morning
“Services Tires, Auto battery replacement, General repairs & maintenance, Tire rotations, Brakes, Auto tire replacement, Auto maintenance, Battery, Oil change”
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Kellymoss Inc.
“Unfortunately we encountered another issue on our way to Wisconsin which required various changes to the original repair commitment we had received from Louis.”
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Main & Page Auto & Towing
- Fair
- Communication
- Morning
“I used to do most of my own work but age has caught up to me and I am more than thrilled that I have found a mechanic I will be using for the rest of my lifetime.”
Car Tune Up Services in Janesville, WI Cost Estimates
Minimum cost
$163
Maximum cost
$869
National Average
$326
Avg Per Hour Rates
$71
$218
$489
Typical price range is based on 448 cost profiles
Why these companies made our list
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FAQ
Which shops listed for Janesville open on Saturdays or Sundays?
10 of the 24 shops here show Saturday or Sunday hours. Plugs and filters fit neatly into a Saturday. A chase for an intermittent misfire does not, since it can need the car overnight to catch the fault happening from cold.