Now Open Mon-Fri 9-5 Saturday Hours 9-2 Free Check-Engine Scan with Repair Honest Diagnostics, Fair Pricing Call 314-494-0310 North St. Louis Neighborhood Shop Now Open Mon-Fri 9-5 Saturday Hours 9-2 Free Check-Engine Scan with Repair Honest Diagnostics, Fair Pricing Call 314-494-0310 North St. Louis Neighborhood Shop
STL
Walnut Park // 6315 Lillian Ave // Est. Neighborhood Shop

Honest hands on every bolt you turn over.

The North Side's mechanic for people who want the truth about their car, not a story. Diagnostics, maintenance, tires, and complete car care at a price that respects your pocket. One shop, one owner, one standard: get it done right the first time.

// 24/7 AI Shop Assistant // Meet Nia Electrical Diagnostics Mechanical Repair Tires & Alignment Brakes Oil & Fluids
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100%
Response Rate
6hr
Avg. Reply Time
1on1
Owner-Operated
$$
Fair & Up-Front
01 // What We Fix

Complete car care, without the runaround.

We tell you exactly what's wrong, what it costs, and what can wait. No upsell theater. No "while we're in there." Just clean diagnostics and the right repair for your ride.

01DIAGNOSTIC

Electrical & Mechanical Diagnostics

Check-engine light on? Mystery rattle? Dashboard telling stories? We run real diagnostics, not guesses, and tell you exactly what we find.

  • OBD-II Scan & Code Read
  • Battery, Alternator, Starter Test
  • Wiring & Sensor Tracing
  • Drivability & Stall Diagnosis
02MAINTENANCE

Maintenance Repairs

Keep it running, keep it yours. Scheduled service done the way the factory intended, with the parts your car actually needs.

  • Oil & Filter Changes
  • Transmission & Coolant Flush
  • Belts, Hoses, Spark Plugs
  • Factory Service Intervals
03BRAKES

Brakes & Suspension

Grinding, pulling, bouncing, squealing. Anything your car does that it shouldn't. We handle pads, rotors, shocks, struts, and everything that keeps you planted.

  • Pads & Rotors
  • Brake Lines & Calipers
  • Shocks & Struts
  • Control Arms & Bushings
04TIRES

Tires & Alignment

New tires, used tires, patches, rotations, balance and alignment. Straight-line tracking and the right rubber for what you actually drive.

  • New & Quality Used Tires
  • Mount, Balance, Rotate
  • Flat Repair & Patching
  • Four-Wheel Alignment
05ENGINE

Engine & Drivetrain

Misfires, overheating, oil leaks, clunks, slipping gears. Real engine work by someone who has seen these problems a thousand times.

  • Timing Chains & Gaskets
  • Water Pumps & Radiators
  • Transmission Service
  • Axles, CV Joints, U-Joints
06A/C & HEAT

Heating & A/C

St. Louis summers don't play. Neither do the winters. We recharge, repair, and replace A/C and heater components so your cabin cooperates all year.

  • A/C Recharge & Leak Test
  • Compressor & Condenser
  • Heater Cores & Blowers
  • Cabin Air Filters
02 // Why Us

Four reasons people don't switch shops.

We're not the biggest shop in St. Louis. We're the one you keep coming back to.

01

Straight Talk Pricing

You get an estimate before we touch a wrench. No surprise line items, no inflated "shop supplies," no games. If the price changes, you hear about it first.

02

Done Right the First Time

We'd rather lose an hour being thorough than lose a customer on a comeback. Every job gets checked. Every fix gets tested. That's the whole standard.

03

Neighborhood Shop Energy

Walnut Park, North County, and the whole North Side. You'll talk to the same person every visit. No service-advisor scripts, no rotating staff. Just your mechanic.

04

Quality Service at a Discount

Fair labor, honest parts sourcing, and the flexibility to work with what your wallet looks like this week. Quality car care shouldn't require a dealership bill.

03 // The Shop

A North Side shop for people who need their car.

Your car isn't a luxury. It's how you get to work, pick up kids, get groceries, and run your life. So when it breaks, you need honest answers fast, not a sales pitch.

STL Auto Clinic sits at 6315 Lillian Ave in Walnut Park, right off Goodfellow. We've been a neighborhood fixture for drivers across North St. Louis and North County who are tired of dealership runarounds and chain-shop upsells. If you can drive it in, we can almost certainly figure it out.

"Best auto repair shop I've ever experienced. Honest, excellent, and kind. Really cares that the job is done right the first time." Regular Customer · Google Review

We run a tight shop on purpose. Smaller overhead, more attention per car, and a standard that doesn't budge whether you're in a 2003 Impala or a 2024 Accord.

Walnut Park // North STL
One shop.
One standard.
6 day Open week
All makes Domestic & Import
Walk-ins Welcome
04 // How It Works

From rattle to road, in four steps.

No mystery. No black-box repair. You know what's happening to your car from the minute it pulls in.

Step 01

Call or Drop In

Dial 314-494-0310 or pull up to the shop. We'll ask what's going on and give you a realistic window for when we can look at it.

Step 02

Real Diagnostic

We hook it up, listen to it, drive it if we need to. Then we tell you what's wrong in plain English, with the root cause, not just the symptom.

Step 03

Up-Front Quote

You get the full price before we start, including parts and labor. If we find something else mid-job, you hear about it and you decide.

Step 04

Tested, Then Keys

Repair, road test, double-check. You leave with a car that drives the way it's supposed to, not one that's coming back next week.

Nia, the AI shop manager for STL Auto Clinic
Nia.exe // Online STL // 24/7
Nia.
AI Shop Manager // STL Auto Clinic
24/7
On Call
<3s
Pickup
∞
Memory
// Meet Nia

The shop never sleeps anymore.

Born and raised in North City. Wash U educated. Now running the phones, scheduling, and intake around the clock so every customer gets answered the first time they call.

Nia is the AI shop manager for STL Auto Clinic. She answers calls 24/7, remembers every customer she talks to, and routes the real work to the shop. Call after hours? She picks up. Need an estimate, want to schedule, lost your paperwork? She's got it.

Answers Every Call
Texts Back Instantly
Schedules Appointments
Pre-Intakes the Problem
Sends Status Updates
Remembers Every Customer
Quotes & Price Checks
Follow-Ups & Reminders
Or Call 314-494-0310
Tap to talk · Uses your microphone
05 // Word on the Street

What customers actually say.

Real people, real cars, real problems we fixed. Pulled straight from review pages.

4.8
★★★★★
Consistently high rated
★★★★★

The best auto repair shop I ever have experienced. The owner is honest, excellent, and kind. In and out quickly and really affordable. They care that the job is done right the first time.

Longtime Customer Repeat Visit
★★★★★

The most honest mechanic I've found in St. Louis. Very reasonable and does good work. I moved out of the city and still make the 40-minute drive back because I wouldn't trust anyone else to work on my car.

Out-of-City Regular Loyal
★★★★★

Finally a shop that explains what's wrong without making me feel stupid or trying to sell me stuff I don't need. Fair pricing and the repair held up. That's all I need from a mechanic.

First-Time Visit Converted
06 // Come By

6315 Lillian Ave // Walnut Park // STL

Right off Goodfellow. Walk-ins welcome, appointments even better. Closed Sunday so we can be sharp all week.

You are welcome here

STL Auto Clinic

North St. Louis // Walnut Park West
Address
6315 Lillian Ave
Saint Louis, MO 63136
Phone
314-494-0310
Shop Hours
Monday9:00 AM to 5:00 PM Tuesday9:00 AM to 5:00 PM Wednesday9:00 AM to 5:00 PM Thursday9:00 AM to 5:00 PM Friday9:00 AM to 5:00 PM Saturday9:00 AM to 2:00 PM SundayClosed
Call Now Directions
07 // Areas We Serve

Every neighborhood north of Delmar.

STL Auto Clinic sits at 6315 Lillian Ave in Walnut Park, right off Goodfellow Boulevard. We're the neighborhood mechanic for North St. Louis city, the inner suburbs of North County, and anywhere a short drive away. If you're searching "mechanic near me" from any of these areas, you're in the right spot.

North City

  • Walnut Park West
  • Walnut Park East
  • The Ville
  • Baden
  • Riverview
  • North Pointe
  • College Hill
  • Mark Twain
  • O'Fallon
  • Penrose
  • Fairground
  • JeffVanderLou

North County

  • Jennings
  • Ferguson
  • Dellwood
  • Black Jack
  • Florissant
  • Spanish Lake
  • Moline Acres
  • Country Club Hills
  • Bellefontaine Neighbors
  • Pine Lawn
  • Normandy
  • Cool Valley

Nearby & Metro East

  • Downtown STL
  • Central West End
  • The Grove
  • Midtown
  • University City
  • Hazelwood
  • Bridgeton
  • Overland
  • Wellston
  • East St. Louis, IL
  • Venice, IL
  • Granite City, IL
Zip codes we serve most: 63136 · 63137 · 63138 · 63121 · 63147 · 63133 · 63135 · 63134 · 63031 · 63033 · 63113 · 63112 · 63115 · 63120
08 // FAQ

Straight answers, no runaround.

If your question isn't here, call 314-494-0310 or talk to Nia. She answers 24/7.

Where is STL Auto Clinic located?
6315 Lillian Ave, Saint Louis, MO 63136, right off Goodfellow in the Walnut Park neighborhood of North St. Louis. We serve Walnut Park, The Ville, Baden, Jennings, Ferguson, Florissant, and all of North County. Get directions.
What are your shop hours?
Monday through Friday 9 AM to 5 PM, Saturday 9 AM to 2 PM. Closed Sunday. Call 314-494-0310 during shop hours, or use the Nia AI shop assistant on this site 24/7.
Do I need an appointment, or can I walk in?
Walk-ins are welcome and appointments are even better. Call or tap to talk to Nia and we'll get you on the calendar for the next open slot.
What makes and models do you work on?
All makes, domestic and import. Cars, SUVs, and light trucks of every age and brand. If you can drive it in, we can almost certainly figure it out and fix it.
How much does a diagnostic scan cost?
A basic OBD-II diagnostic scan starts around $65 to $95. The scan fee is typically waived when you book the recommended repair with us. Final price after we see the car.
Do you give free estimates?
Yes. Call or stop in and we'll give you an honest, up-front estimate before we touch your vehicle. If we find something else once the car is on the lift, you hear about it and you decide.
Are you a Black-owned mechanic shop in North St. Louis?
Yes. STL Auto Clinic is a Black-owned, independent neighborhood auto repair shop in North City. We're proud to serve North St. Louis and North County with fair prices and straight-talk service.
Can I get a quote after hours?
Absolutely. Use the Nia AI shop assistant on this site any time. She takes intake, gives ballpark pricing ranges, and books appointments for the next business day.
Do you offer financing or payment plans?
We'll work with you. Call and we'll be straight with you about what a repair costs and how we can make it fit. We accept cash, credit, and debit.
Ready when you are

Car acting up?
Let's fix it for real.

One call, one quote, one repair that holds. Pick up the phone and tell us what's going on. We'll take it from there.

Direct to the shop 314-494-0310
Call 314-494-0310 Get Directions