Hillside Auto Repair

Hillside Auto Repair Loved by O'Fallon since 1985! 🚗 Hillside Auto Repair: The Professionals You Can Trust for expert service and honest advice.

All backed by a nationwide 3 yr/36k mile warranty. Your family deserves the best - we deliver!

$60,000 Truck? No Problem. $2,500 Repair? HIGHWAY ROBBERY?! 😂We had to talk about it because there is a very real lesson...
09/02/2026

$60,000 Truck? No Problem. $2,500 Repair? HIGHWAY ROBBERY?! 😂

We had to talk about it because there is a very real lesson hiding behind the joke.💥

People will finance a $60,000 truck at 9% and accept years of payments, but a $2,500 repair on a paid-off vehicle can suddenly feel outrageous.

Here is the thing: paid off does not mean maintenance free. 🧑‍🔧

A quality repair can sometimes be the smarter financial decision when compared with a new vehicle payment, higher insurance, taxes, registration and depreciation.

At Hillside Auto Repair, we want you to have the information you need to make that decision intelligently. We offer comprehensive auto repair services, use the same tools and equipment that the dealership does, provide multiple system maintenance services and back all services we provide with a 3-year/36,000-mile warranty.

And we have been doing it right here in O'Fallon since 1985.🧰

So before you write off your vehicle because of one scary repair estimate, read our latest blog!

Click the link to read:
👉 https://hillsideautomotiverepair.com/blog/repair-is-not-robbery

What would you choose: a $2,500 repair on a vehicle you already own, or another five or six years of car payments? 💸💸

Is your vehicle idling rough, using more oil than usual, or flashing that dreaded check-engine light? A tiny PCV valve c...
09/01/2026

Is your vehicle idling rough, using more oil than usual, or flashing that dreaded check-engine light? A tiny PCV valve could be part of the problem. 💥

We break down what this important engine component does, the symptoms that signal trouble, and why professional diagnosis matters. 🧰

At Hillside Auto Repair in O’Fallon, we use dealership-level tools, provide comprehensive repair and maintenance services, and back our work with a 3-year/36,000-mile warranty. 😎

Click the link to read the blog:
👉https://hillsideautomotiverepair.com/blog/what-is-a-pcv-valve-the-small-part-with-a-big-job

Let us help your engine breathe easier. What warning sign has your vehicle been giving you?

Is your car doing the "O'Fallon Shuffle" at every red light? 🌟 That rough idle, that hesitation when you hit the gas, th...
08/31/2026

Is your car doing the "O'Fallon Shuffle" at every red light? 🌟

That rough idle, that hesitation when you hit the gas, that flashing dashboard light that looks like a disco ball? Yeah, that's an engine misfire, and it's not dancing for joy. 🚗💨

We have been fixing these sneaky gremlins since 1985, and we can tell you exactly what is wrong without the song and dance.

Click the link below to read our full blog on "The Anatomy of a Misfire" and learn why your engine is throwing a tantrum.

Spoiler alert: Ignoring it will cost you way more than a diagnosis from the pros. Ready to save your engine and your wallet?

Tap that link! 👇
https://hillsideautomotiverepair.com/blog/the-anatomy-of-a-misfire-what-you-need-to-know

That little heated oxygen sensor has a big impact on fuel economy, engine performance, emissions, and your check-engine ...
08/26/2026

That little heated oxygen sensor has a big impact on fuel economy, engine performance, emissions, and your check-engine light. If it fails, the real issue may be more than a simple sensor replacement.💥

We break down how heated O2 sensors work, the warning signs to watch for, and why O’Fallon drivers have trusted Hillside Auto Repair since 1985. 🧑‍🔧🧰

We use dealership-level tools, provide comprehensive repairs and maintenance, and back every service with a 3-year/36,000-mile warranty.

Click the link to read the blog:

👉https://hillsideautomotiverepair.com/blog/design-and-failure-modes-of-a-heated-oxygen-sensor

Now tell us: has your check-engine light ever shown up at the worst possible time?

Port injection is making a comeback in modern vehicles, and it is not just because automotive engineers miss the good ol...
08/25/2026

Port injection is making a comeback in modern vehicles, and it is not just because automotive engineers miss the good old days. Some engines use it alongside direct injection to support smoother operation, cleaner intake valves, and smart fuel delivery.

Wondering whether your vehicle has port injection, direct injection, or both?

Click the link to read our latest blog, learn what warning signs to watch for, and see why O’Fallon drivers trust Hillside Auto Repair for fuel-system diagnostics and repairs.

https://hillsideautomotiverepair.com/blog/port-injection-why-an-old-favorite-is-finding-its-way-back-under-the-hood

Is your check-engine light behaving, or is it trying to become the most active member of your dashboard? Tell us below.

🚗 Your car's alignment is like its posture, and nobody likes a sloucher. Toe, camber, caster... sounds like a law firm, ...
08/24/2026

🚗 Your car's alignment is like its posture, and nobody likes a sloucher. Toe, camber, caster... sounds like a law firm, but these angles are actually eating your tires alive if they are off.

Want to stop throwing money at uneven tread and white-knuckle steering? We have the scoop in our latest blog.

Click the link to read the full story, and then come see us at Hillside Auto Repair, where we have been straightening out O'Fallon drivers since 1985. 👇

https://hillsideautomotiverepair.com/blog/the-wheel-alignment-trinity-understanding-toe-camber-and-caster

Your tires will thank you, and so will your chiropractor.

Happy 17th Birthday to Logan! 🎉🎂SEVENTEEN. How did that happen?! 😭From all of us at the shop, we want you to know just h...
08/20/2026

Happy 17th Birthday to Logan! 🎉🎂

SEVENTEEN. How did that happen?! 😭

From all of us at the shop, we want you to know just how proud we are of the young man you're becoming. You're already in your second intern/apprenticeship role at the shop, getting real-world experience and learning the automotive trade—and now you're taking the next big step by attending Lewis & Clark Career Center this school year in their Automotive Technology program! 🔧🚗

Logan, you've grown into a smart, funny, kind, slightly sarcastic, dog-loving gamer with a future that's already starting to take shape. We can't wait to see where you take it.

Happy 17th birthday, kiddo! We love you, we're proud of you, and we're so lucky to get to watch you grow up. ❤️

Now go enjoy being 17 before someone makes you do actual adult paperwork. 😂🎂🔧

Your engine is screaming at you, but are you even listening? 🚨 Ignore those knocks and ticking sounds, and you will be h...
08/19/2026

Your engine is screaming at you, but are you even listening? 🚨

Ignore those knocks and ticking sounds, and you will be hearing a mechanic's estimate that will make you scream even louder. 😱

We use BG's MOA in every oil change to give your engine the ultimate protection, because we actually care about your car outliving your payments.

🛞 Stop playing roulette with your ride and click the link to our latest blog post to see if you have gone too long. Trust us, your engine will thank you. 🤝

Read the full story here: https://hillsideautomotiverepair.com/blog/your-engine-is-screaming-but-are-you-listening

Tired of your car feeling like it's stuck between a rock and a hard place? Or worse, a hard shift? 😉 We just dropped a n...
08/18/2026

Tired of your car feeling like it's stuck between a rock and a hard place? Or worse, a hard shift? 😉 We just dropped a new blog diving deep into the world of CVT transmissions. We talk history, highway heroes, and the costly headaches we see rolling into our O'Fallon bays. Does your Nissan, Subaru, or Honda have one of these gearless wonders? You NEED to read this before your next road trip.

Click the link to learn more: https://hillsideautomotiverepair.com/blog/the-gearless-wonder-understanding-the-cvt 🔧🚗

Address

400 Church Street
O'Fallon, MO
63366

Opening Hours

Monday 8am - 1pm
2pm - 5pm
Tuesday 8am - 1pm
2pm - 5pm
Wednesday 8am - 1pm
2pm - 5pm
Thursday 8am - 1pm
2pm - 5pm
Friday 8am - 1pm
2pm - 5pm

Telephone

+16362401050

Website

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