I want to take the guesswork out of selling your car. I analyze market data, decode DMV title laws, and test out online car buyers to give you a straight answer on whether it's worth holding out for a higher price or if you're better off taking the most convenient offer and moving on.
Published:Mar 31, 2026
Last Updated:Apr 16, 2026
✓ Fact Checked:Mar 31, 2026
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The bottom line: In most states, a failed emissions test doesn’t legally stop you from selling your car. You can sell it as-is to an online buyer today without fixing a thing. The exceptions are California, Georgia (metro Atlanta counties), and Missouri (St. Louis area), where sellers must provide a passing smog certificate to the buyer.
Some buyers give you an instant quote online with no questions about the smog issue. Others route emissions-problem cars to a phone call. The winner changed depending on the vehicle, so get 2 to 3 quotes before deciding.
offered the most on 3 out of 5 vehicles, including the highest single quote in the test at $2,045 for the 2008 Nissan Frontier
was the only service to give instant online quotes on all 5 vehicles without routing any to a phone call
beat on the 2006 BMW X5 and the 2010 Land Rover Range Rover, both by less than $40
routed 4 out of 5 vehicles to a required phone call and only gave an instant quote on the 2004 Lexus RX 330
lets you counter their first offer, which none of the other instant buyer services allow
and can get you more money but require you to disclose the emissions issue, handle all buyer contact, and find your own tow truck if the car won’t drive
No single company offered the most on every vehicle. The winner changed depending on the car.
Our take on Peddle:Peddle buys cars as-is and won’t turn you away because of a check engine light or a failed smog test. Their online form asks about your car’s condition, and a failed emissions issue doesn’t stop the quote from processing. Unlike some services that send emissions-issue cars to a phone call, Peddle gave us an instant quote on all 5 vehicles we tested, including the ones with active check engine lights that triggered the smog failure.
Pros
Gives instant online quotes even when your car has a check engine light or smog failure
Free towing at pickup, so a car that won’t pass inspection still gets picked up at no cost to you
Quotes stay valid for 7 days, giving you time to compare before deciding
Cons
Offers can change at pickup if the driver finds a problem you didn’t mention, like a missing catalytic converter that’s related to the emissions failure
Pickup windows are 4-hour blocks, not a specific time
Payment is by check or cash depending on the tow company, not your preference
Why we picked it: Peddle offered the most on 3 out of 5 test vehicles and was the only service to give instant quotes on all 5. Their highest offer was $2,045 for a 2008 Nissan Frontier with a catalytic converter check engine light. For sellers who want a number right away without being routed to a phone call, Peddle is the most reliable option for cars with emissions issues.
What Peddle says about buying cars with a failed emissions test:
Peddle gave the most instant quotes and the highest single offer in our test.
Our take on CashForCars:CashForCars is owned by Copart, one of the largest auto auction companies in the country, with about 200 locations. That network means they can move emissions-failed cars through auction channels that most small buyers can’t access. They state directly on their site that a failed emissions test isn’t a dealbreaker, and they gave us instant quotes on all 5 vehicles we tested.
Pros
Explicitly states that a failed emissions test doesn’t prevent them from buying your car
Backed by Copart’s auction network, which can sell emissions-failed cars to buyers who repair and resell
Gave instant quotes on all 5 test vehicles without routing any to a phone call
Cons
Payment is by check, and your bank may hold it for 24 hours before you can access the money
The offer may change at pickup if the driver finds emissions-related damage you didn’t mention, like a missing catalytic converter
Follow-up calls and emails after requesting a quote can be frequent
Why we picked it: CashForCars offered the most on 2 out of 5 vehicles, edging out Peddle by $12 on the 2010 Land Rover Range Rover and by $38 on the 2006 BMW X5. For higher-value cars with emissions issues, CashForCars’ auction network appears to give them a slight edge over the competition on certain vehicles. Their explicit messaging that failed emissions tests are acceptable removes any guesswork about whether to apply.
What CashForCars says about buying cars with a failed emissions test:
CashForCars offers the most on some vehicles and has about 200 locations for faster pickups.
Our take on Wheelzy:Wheelzy is known for fast pickups on problem cars and explicitly states on their site that a failed smog test doesn’t stop them from buying. Their process is usually 24 to 48 hours from quote to pickup. The catch we found in testing is that 4 out of 5 of our emissions-issue vehicles were routed to a required phone call instead of getting an instant online quote. If you don’t mind a quick call to get your number, Wheelzy is still a solid option for getting your car gone fast.
Pros
Explicitly buys cars that failed an emissions or smog test, no questions asked
Same-day pickup available in many areas, so a car stuck on your property due to emissions issues can be gone quickly
Free towing whether your car drives or not, which matters when emissions problems cause the car to run rough
Cons
Most emissions-issue vehicles were routed to a required phone call in our test instead of getting an instant online quote
The online quote process sometimes shows “speak with our team” instead of a dollar amount, adding a step before you know your offer
Won’t buy vehicles older than 1981, which cuts out some older cars that may also have emissions-related problems
Why we picked it: Wheelzy’s strength is pickup speed, not quote amounts. When they did give an instant quote (the 2004 Lexus RX 330 at $462), Peddle offered more than double at $1,000 for the same car. But if your priority is getting the car picked up as fast as possible and you’re willing to call for a quote, Wheelzy can move as quickly as anyone on this list.
What Wheelzy says about buying cars with a failed emissions test:
Wheelzy picks up fast. Call or go online to get your quote.
Our take on CarBrain:CarBrain has been buying problem cars since 2007 and explicitly handles cars with salvage titles, accident history, and mechanical problems, which puts emissions-failed vehicles squarely in their target market. What sets them apart from the other instant buyers on this list is that you can counter their first offer if you think your car is worth more. That flexibility matters when fewer buyers are willing to touch your car due to the emissions issue.
Pros
You can counter their first offer if you think the emissions issue is minor and your car is worth more
Buys cars with mechanical problems and salvage titles, including vehicles with emissions failures
Quotes valid for 7 days, giving you time to compare against Peddle and CashForCars before deciding
Cons
Offers generally run lower than competitors for the same car, so the negotiation option helps close that gap
Won’t buy cars missing the engine or transmission, which can overlap with some severe emissions-related failures
The title must be in your name before they’ll proceed, which adds a step if paperwork isn’t in order
Why we picked it: CarBrain is worth getting a quote from specifically because they let you push back on the first number. When your car has a known issue like a failed smog test, first offers from any buyer tend to be conservative. Having the option to counter can make a difference, especially on higher-value vehicles where the gap between a first offer and a fair offer is larger.
CarBrain is the only service on this list that lets you counter their offer.
Our take on eBay Motors:eBay Motors is a listing marketplace where you set your own price and sell directly to buyers. For cars with emissions issues, eBay reaches a national audience that includes mechanics, rebuilders, and buyers in states with looser smog requirements. A flat listing fee of $19 to $79 applies, but eBay takes no percentage of your sale price. You’ll need to be upfront about the emissions failure in your listing, and the right buyer may pay more than any instant offer service would.
The trade-off is time and effort. You write the listing, handle all buyer messages, and arrange shipping or local pickup yourself. If the car runs poorly due to the emissions issue, arranging a test drive or transport to a buyer can add complications that instant offer services avoid entirely.
Best For Free Local Listings: Facebook Marketplace
Our take on Facebook Marketplace:Facebook Marketplace is free to list on and reaches local buyers quickly. For cars with emissions issues, it works best when you disclose the problem clearly in the listing and price the car to reflect it. Sellers report getting more money here than from instant offer services, especially for cars that still drive fine but just can’t pass a smog test. The Craigslist listings we found for our 5 test vehicles showed sellers asking $1,500 to $19,900 with emissions issues disclosed, often with multiple interested buyers responding.
You’ll handle everything yourself: photos, messages, meeting buyers, and selling privately means no free towing if the car won’t drive. But if your car has value beyond what the instant offer services will give, listing locally is worth the extra effort.
Sell a Car with a Failed Emissions Test: Feature Comparison
Company
Quote Process
Free Towing
Counter Offer
Instant online
Yes
No
Instant online
Yes
No
Instant online
Yes
Yes
Instant or call required
Yes
No
DIY listing ($19 to $79)
No
You set the price
DIY listing (free)
No
You set the price
Selling a Car with a Failed Emissions Test: What Each Buyer Offered
We submitted 5 vehicles with known emissions issues or check engine lights that would prevent passing a smog test to Peddle, CashForCars, and Wheelzy. All quotes were collected using the same Florida zip code.
All Offers at a Glance
Vehicle
2008 Nissan Frontier
$2,045
$1,206
Required call
2010 Land Rover Range Rover
$1,015
$1,027
Required call
2004 Lexus RX 330
$1,000
$633
$462
2004 Toyota Corolla
$870
$428
Required call
2006 BMW X5
$390
$428
Required call
2008 Frontier
2010 Range Rover
2004 Lexus RX
2004 Corolla
2006 BMW X5
2008 Nissan Frontier Crew Cab LE
135,000 miles · Clean title · Catalytic converter check engine light (CEL) · Does not affect drivability
$2,045
$1,206
Required call
2010 Land Rover Range Rover HSE Luxury
69,200 miles · Clean title · Stored speed sensor code (P0500) · Failed California smog inspection
$1,027
$1,015
Required call
2004 Lexus RX 330
230,000 miles · Clean title · Won’t pass smog · Has one stored code
$1,000
$633
$462
2004 Toyota Corolla CE
221,000 miles · Clean title · Check engine code P0741 · Registration expired · Unable to smog
$870
$428
Required call
2006 BMW X5 3.0i
122,120 miles · Clean title · Check engine light on · Did not pass smog test
$428
$390
Required call
Keep in mind: We got these quotes using a Florida zip code. Offers can change depending on where you live, your car’s condition, and what buyers need in your area. You might get higher or lower offers.
What This Tells Us
What this tells us:
Peddle’s offer advantage was clearest on the older, high-mileage vehicles. The gap between Peddle and CashForCars narrowed considerably on the higher-value Land Rover and BMW.
CashForCars, backed by Copart’s auction network, scored higher on the luxury and European vehicles, likely because those cars have more resale value to auction buyers even with emissions issues.
Wheelzy routed 4 out of 5 vehicles to a required phone call. This is worth knowing before you apply, since you may not get a number instantly even though their site accepts these cars.
A failed emissions test doesn’t always mean the car has serious problems. Two of our test vehicles (the Range Rover and the Toyota Corolla) had clean titles and drove fine. Buyers price these based on the repair cost needed to pass smog, not the car’s overall condition.
CarBrain’s counter offer option is most valuable on cars where the first offer feels low relative to what you know the car is worth. When the pool of willing buyers is smaller due to an emissions issue, having the ability to push back on the number can matter.
Private buyers on Facebook Marketplace and eBay Motors priced emissions-issue cars a lot higher than what instant offer services offered in our test. That gap is the cost of handling the sale yourself versus having a buyer come to your door.
Getting quotes from both Peddle and CashForCars takes under 5 minutes each and can reveal a meaningful difference depending on your car. The gap between them was small on some vehicles and wide on others.
Your location affects which buyers are active and what they can offer. The quotes here used a Florida zip code, and results will vary in states with stricter emissions rules like California, where the smog issue may affect the offer more.
Not sure which service will offer the most for your car? Get quotes from multiple buyers at once and compare them side by side.
Which states require a passing emissions test before selling a car?
Only three states require sellers to provide a passing smog certificate to the buyer.
California requires it for most gasoline vehicles more than four model years old. Georgia requires it in 13 metro Atlanta counties: Cherokee, Clayton, Cobb, Coweta, DeKalb, Douglas, Fayette, Forsyth, Fulton, Gwinnett, Henry, Paulding, and Rockdale.
Missouri requires it in the St. Louis city and county area, including St. Louis City, St. Louis County, St. Charles, and Jefferson counties.
In all other states, a failed emissions test is not a legal barrier to selling. You can sell the car as-is to an instant offer service or a private buyer without passing a smog test first.
The buyer takes on the responsibility of getting it compliant for registration in their state.
Does Peddle buy cars with a failed emissions test?
Yes. Peddle buys cars as-is regardless of whether they passed a smog test. In our test, they gave instant online quotes on all 5 vehicles with emissions issues, including cars with check engine lights active.
Peddle has a 4.7/5 rating on Trustpilot from 190,094 reviews. They pick up within 24 to 48 hours and pay by check or cash at pickup.
Does CashForCars buy cars with a failed emissions test?
Yes. CashForCars explicitly states on their website that a failed emissions test doesn’t stop them from making an offer. They gave instant quotes on all 5 of our test vehicles.
CashForCars is owned by Copart and has about 200 locations. They have a 4.4/5 on Trustpilot from 8,840 reviews.
Does Wheelzy buy cars with a failed emissions test?
Yes. Wheelzy states on their site that a failed smog test doesn’t prevent them from buying your car.
In our test, 4 out of 5 vehicles were routed to a required phone call rather than an instant online quote, so be prepared to speak with someone to get your number.
Wheelzy has a 4.7/5 on Trustpilot from 77,445 reviews and typically picks up within 24 to 48 hours.
Does CarBrain buy cars with a failed emissions test?
Yes. CarBrain buys cars with mechanical problems, accident history, and salvage titles, which puts emissions-failed vehicles in their normal buying range.
They’ve been doing this since 2007 and have bought close to a million cars.
CarBrain has a 4.9/5 on Trustpilot from 7,500 reviews. One notable feature: you can counter their first offer if you feel it’s too low.
Should I fix the emissions problem before selling?
It depends on what caused the failure. Minor fixes like an oxygen sensor or gas cap replacement cost very little and might open up more buyers.
Bigger repairs like a catalytic converter replacement or an evap system fix can cost $500 to $2,000 or more, and the increase in your offer often won’t cover that cost.
Get quotes first without fixing anything. If the gap between what instant buyers offer and what you’d get after repairs is bigger than the repair cost, fixing it makes sense. If not, sell as-is.
How much does a failed emissions test lower a car’s value?
It depends on what caused it. A cheap fix like a loose gas cap causes almost no real drop in value once disclosed.
A catalytic converter failure or a complex engine code can lower offers by hundreds of dollars because the buyer prices in the repair.
In our test, the 2008 Nissan Frontier with a catalytic converter check engine light still got offers over $1,200 from multiple buyers.
The 2004 Toyota Corolla with a transmission code (P0741) got offers between $428 and $870. The nature of the code matters more than just the fact of failing.
Can I sell a car with a failed emissions test privately?
Yes, but you need to disclose the issue. Private buyers often want the car for parts, to fix and register in a different state, or because they’re mechanics who can handle the repair cheaply.
Craigslist listings we reviewed for our 5 test vehicles showed sellers asking $1,500 to $19,900 with the emissions issue clearly listed.
The main challenge is that most buyers will negotiate hard once they see the failed smog test.
Be prepared for lower-than-asking offers and buyer questions about what the check engine code is and how much the repair costs.
What do I need to sell a car that failed its emissions test?
For instant offer services like Peddle, CashForCars, and CarBrain, you’ll need a clean title in your name and basic car details like the VIN, year, make, model, and mileage.
You don’t need to fix anything first. Just describe the condition honestly, including the check engine code if you know it.
For private sales on Facebook Marketplace or eBay Motors, you’ll also want the diagnostic code from your last smog test so buyers can research the repair cost before making an offer.
Having that information ready reduces back-and-forth with buyers.
Does a failed emissions test mean the car won’t start?
Not at all. Most cars with failed emissions tests run fine.
An emissions failure usually means the car has a stored diagnostic code that puts it outside the legal limit for pollutants or doesn’t allow it to be registered.
Three of our 5 test vehicles were listed by their owners as driving well.
If your car won’t start in addition to having an emissions issue, that’s a separate problem.
Instant offer services still buy cars that won’t start, but those typically get lower offers than cars that drive but just can’t pass smog.
How fast can I sell a car with a failed emissions test?
With an instant offer service, you can get a quote in a few minutes and have the car picked up within 24 to 48 hours.
Peddle, CashForCars, and Wheelzy all offer free towing and can schedule pickup as soon as the next day in most areas.
Selling privately takes longer.
A Facebook Marketplace listing for a car with a disclosed emissions issue may take anywhere from a few days to a few weeks to find the right buyer, depending on your asking price and location.
Does a failed emissions test affect which states I can sell in?
Not for instant offer services. Peddle, CashForCars, Wheelzy, and CarBrain all operate nationwide and don’t require the car to pass a smog test before buying.
Your state’s rules only affect whether the next owner can register the car locally.
For private sales, selling to a buyer in a state with no emissions testing requirements (like many rural states) can help you get closer to full market value since that buyer won’t need to repair anything before registering.
Methodology
We selected 5 vehicles with known emissions failures or check engine lights that would prevent passing a smog test: a 2008 Nissan Frontier Crew Cab LE (135,000 miles, catalytic converter CEL), a 2010 Land Rover Range Rover HSE Luxury (69,200 miles, failed smog due to stored speed sensor code), a 2004 Lexus RX 330 (230,000 miles, won’t pass smog, one stored code), a 2004 Toyota Corolla CE (221,000 miles, P0741 transmission code, unable to smog), and a 2006 BMW X5 3.0i (122,120 miles, check engine light on, did not pass smog). All 5 had clean titles.
We submitted each vehicle to Peddle, CashForCars, and Wheelzy using the same Florida zip code. We answered all condition questions honestly, disclosed the emissions status, and captured screenshots of every result. We did not attempt to negotiate or improve our descriptions to inflate quotes.
We did not accept any offers. Your results may differ based on your location, your car’s exact condition, and which buyers are active in your area at the time you apply.
offered the most on 3 out of 5 vehicles, including the highest single quote in the test at $2,045 for the 2008 Nissan Frontier
beat
routed 4 out of 5 vehicles to a required phone call and only gave an instant quote on the 2004 Lexus RX 330
lets you counter their first offer, which none of the other instant buyer services allow
