Smog Check in Oxnard, CA — $59 Test & Repair Station
Registration due or selling a car? Get your smog test done for $59 on Ventura Blvd — and if it doesn't pass, our ASE-certified technicians diagnose and repair it in the same shop.
Mon–Fri 8am–5pm · Sat 9am–1pm · 2681 Ventura Blvd, Oxnard · Loaners & shuttle available
Pass the first time — or know exactly why not
In California most gasoline vehicles need a smog check every two years at registration, and most also need one when they change owners. When your DMV renewal notice says smog certification is required, bring it to Dieter's Motors on Ventura Blvd, just off the 101 in Oxnard. The test is $59 for cars, vans and light trucks. We test drivers from Oxnard, Camarillo, Port Hueneme, El Rio and across Ventura County (the state smog certificate fee may be added if your vehicle passes — ask when you book).
Because we are a smog and repair station, a failed test isn't a dead end. The same shop that ran the test reads the codes, checks the readiness monitors and finds what is actually wrong — a vacuum leak, a tired oxygen sensor, a catalytic converter or an EVAP fault. You get a written estimate before any repair starts. For harder problems we use the same tools as our check engine light diagnostics service. Once it's fixed, we re-test it here, so you leave with a passing result instead of a to-do list.
We have tested and repaired vehicles in Oxnard since 1972, from daily commuters and work vans to Mercedes-Benz and BMW. Running a diesel truck over 14,000 lbs GVWR? That falls under CARB's separate program — see our Clean Truck Check page. Whatever you drive, call (805) 485-1575 to book.
Smog testing and smog repair in one stop
Test, diagnose, repair and re-test without driving across town — and you always know the next step.
$59 Smog Check
California smog inspection for cars, vans and light trucks — registration renewals, transfers and DMV notices.
Failed Smog Diagnosis
We read the test report, pull codes and pinpoint why it failed instead of guessing with parts.
Check Engine & Monitors
A lit check engine light or incomplete readiness monitors will fail a test — we find the cause and fix it.
Catalytic Converter & O2
Converter efficiency codes and oxygen or air-fuel sensors diagnosed and replaced when they're the real problem.
EVAP & Vacuum Leaks
Gas caps, purge valves, hoses and intake leaks — common smog failures found with proper testing.
Diesel & Heavy Trucks
Diesel trucks over 14,000 lbs GVWR need CARB's Clean Truck Check — we're an official test station for that too.
Simple, posted smog prices
No guessing at the counter. These are our test prices — and if a vehicle fails, the repair is quoted before any work starts.
Cars, vans & light trucks — registration renewals, title transfers and DMV smog notices.
Official CARB HD I/M test for most non-gasoline vehicles over 14,000 lbs GVWR. Details
Failed here or somewhere else? We find the cause and give you a written estimate — free on most cars.
Signs your car may fail a smog test
- Check engine light is on — or was on recently
- Battery was disconnected or replaced in the last few days
- Rough idle, misfires or a raw-fuel smell
- Visible smoke from the tailpipe
- Fuel mileage has dropped noticeably
- It failed before and the problem was never fixed
Why Oxnard drivers bring their smog to us
- Test & repair, one roof No bouncing between a test-only station and a repair shop — we test, fix and re-test here.
- Posted price $59 for cars, vans and light trucks, so you know the cost before you pull in.
- Real diagnostics ASE-certified techs and factory-level scan tools, so repairs target the actual cause of the failure.
- Family-owned since 1972 The same Ventura Blvd shop for decades — we'd rather earn your next visit than sell you parts.
Based on online reviews from Ventura County drivers — many with us for decades.
“Outstanding, family-owned. Honest, thorough and knowledgeable. Large parts inventory, quick turnaround, fair prices.”
“Always a pleasure seeing Lothar and Linda. They only do what is needed and don't rob your pocketbook!”
“Professional, informative, accurate and friendly. When issues arise, there's only one service center for me to call.”
How much is a smog check in Oxnard?
A smog check at Dieter's Motors is $59 for cars, vans and light trucks. If the vehicle fails, we diagnose the cause and give you a written repair estimate before any work starts. Diesel trucks over 14,000 lbs GVWR need a Clean Truck Check instead, which is $99. Call (805) 485-1575.
Do I need an appointment for a smog check?
Calling ahead or booking online is recommended so we can confirm a test slot. We are open Monday through Friday 8am to 5pm and Saturday 9am to 1pm at 2681 Ventura Blvd in Oxnard. Drive the car for at least 15 to 20 minutes before you arrive so the engine is fully warmed up.
What happens if my car fails the smog check?
You get the test report and a clear explanation of why it failed. Because we are a smog and repair station, our technicians can diagnose the fault, quote the repair, fix it here and then re-test. Common causes include check engine codes, incomplete readiness monitors, oxygen sensors, catalytic converters and EVAP leaks.
How often does my car need a smog check in California?
Most gasoline vehicles need a smog check every two years at registration renewal once they are past their first several model years, and most vehicles need one when ownership changes. Your DMV renewal notice will say whether smog certification is required. Fully electric vehicles do not need smog checks.
Can I smog my car right after clearing a check engine light?
Usually not. Clearing codes or disconnecting the battery resets the readiness monitors, and incomplete monitors can fail the test. The car normally needs several days of mixed driving for the monitors to set. If the light keeps coming back, have the fault repaired first — we can diagnose it.
My DMV notice says I need a STAR station. Can you test my car?
Some DMV notices direct a vehicle to a specific type of smog station. Call us at (805) 485-1575 with your notice before you drive over, and we will tell you whether we can test your vehicle so you do not waste a trip.
Visit Dieter's Motors in Oxnard
Dieter's Motors2681 Ventura BlvdOxnard, CA 93036
Phone: (805) 485-1575
Free estimates on most cars.
Local shuttle service and loaner vehicles available while your car is in the shop. Serving Oxnard, Camarillo, Ventura, Port Hueneme, El Rio, Saticoy and all of Ventura County.
- Monday8:00 AM – 5:00 PM
- Tuesday8:00 AM – 5:00 PM
- Wednesday8:00 AM – 5:00 PM
- Thursday8:00 AM – 5:00 PM
- Friday8:00 AM – 5:00 PM
- Saturday9:00 AM – 1:00 PM
- SundayClosed