Send me your year, model and a clip of the knock. I'll tell you straight if it's the Theta II rod bearing — and the first thing I'll check is whether your recall or warranty covers it before you spend a dollar.
Prefer to talk? Call or text 647-450-0406 — answered 24/7.
Takes 30 seconds. I'll text you back with diagnosis + a real number.
A deep, oil-pressure-related knock on a Hyundai/Kia Theta II engine (the 2.0T and 2.4 GDI in the Sonata, Santa Fe, Tucson, Optima and Sorento) is almost always the rod bearing starving for oil — a known manufacturing defect. Before you pay anyone, the first move is checking whether your VIN is covered by the recall/settlement. If it isn't, an out-of-pocket short-block or engine job runs into the thousands. I diagnose it, check your coverage, and flat-quote the real fix at your home across the GTA. Call or text 647-450-0406.
So you've got a knock coming from the engine on your Sonata, Santa Fe, Tucson, Optima or Sorento, and someone's already said the word "engine." I get this exact message constantly, and there's one thing I want you to do before you panic or hand over a deposit anywhere: let me help you check if it's covered. A huge number of these are.
I'm Fares. I'm a mobile mechanic out of Mississauga and the Hyundai/Kia Theta II knock is one of the most common "is my engine done?" calls I get. It's a real, documented defect — not you, not your maintenance. Here's the whole picture.
Your engine is the Theta II — the 2.4L GDI or the 2.0T that Hyundai and Kia put in a pile of cars from roughly 2011 onward: Sonata, Santa Fe Sport, Tucson, Optima, Sportage, Sorento. During manufacturing, metal debris got left in the oil passages that feed the crankshaft. Over time that debris, plus the tight bearing clearances on these, starves the connecting-rod bearings of oil. The bearing wears, the clearance opens up, and you get a knock that gets louder under load. Left alone, the rod lets go and punches a hole in the block — that's the full failure people are scared of.
This was bad enough that it triggered recalls, a class-action settlement, and extended "lifetime" engine warranties on a lot of VINs. That matters more than anything else on this page, so I put it first.
The tells of a Theta II rod-bearing failure:
The single most valuable step: run your VIN against the Hyundai or Kia recall lookup, and call the dealer's service line with it. If your VIN is covered, the engine or short-block can be done at no cost to you through the warranty/settlement — and I'll tell you that straight, because there's no honest reason to pay me for something the manufacturer owes you. I'd rather point you to the free fix and earn the next job than take money you shouldn't be spending.
If your VIN isn't covered and the knock is confirmed, the honest fix isn't a band-aid — a knocking rod bearing means metal is already in the oil. The proper repair is a short block (the bottom end) or a complete replacement engine, transferring over your good parts. It's a big job, but it's a clean, well-understood one on these engines.
I'll be straight, because a page that hides the number wastes your time. The only truly accurate figure comes from confirming the failure and your coverage on your actual car — but here's the honest range for an out-of-pocket job in the GTA.
Dealer, out of pocket: typically $5,000–$7,000+
At your place with Cars With Fares: usually $3,200–$4,500 for a quality short-block/engine swap, flat-quoted before any work.
That's parts and labour as one number. What swings it: whether we go short-block vs. complete engine, the price/availability of a good unit, and the 2.0T turbo cars running a bit higher than the 2.4.
It lands under the dealer because there's no service-department overhead stacked on top, not because anything's skipped. The savings is a byproduct — what you're paying for is the job done once, properly, by the person turning the wrench.
An engine job sounds like a "tow it to a shop" thing, but with proper support and the right approach it's a driveway job, and there's a real advantage to that: you're standing right there. You see the old unit come out, you see what goes in. There's no car vanishing into a shop for a week and coming back with a bill that grew. On a repair this size — and on a brand where people have rightly lost trust over this exact engine — being able to watch it happen is the whole point. You get a flat quote up front, and that's the number.
And practically: most of these still limp along, so I come to you in Mississauga, Brampton, Etobicoke, wherever the car is. No tow, no losing the car to a shop's schedule.
If you've got a confirmed deep knock or a flashing check-engine light: stop driving it. The flashing light on these is often the knock-sensor software doing its job — it's telling you the rod is on the way out. Every extra start risks turning a fixable short-block job into a block with a hole in it. Park it, and let's check your coverage first. If you're covered, you might be getting a free engine and you'd hate to lose that by driving it into the ground.
Tell me your year, model and what the knock sounds like — I'll tell you if it's the Theta II, help you check your recall coverage, and quote the real fix if you're not covered.
Get My Quote →A very large number of Theta II engines (the 2.0T and 2.4 GDI in the Sonata, Santa Fe Sport, Tucson, Optima, Sportage, Sorento) are covered by recalls, an extended warranty, or a class-action settlement for the rod-bearing failure. The first thing to do is run your VIN through the Hyundai or Kia recall lookup and call the dealer with it. If you're covered, the engine or short block is done at no cost to you. I always check this first — there's no reason to pay for something the manufacturer owes you.
If your VIN has fallen outside the recall/settlement window, a quality short-block or replacement engine in the GTA runs roughly $3,200–$4,500 done at your home, versus $5,000–$7,000+ at a dealer. It depends on whether you need a short block or a complete engine, the unit's price and availability, and 2.0T turbo cars run a bit higher than the 2.4. I flat-quote it before any work — and only after confirming you're truly not covered.
It's a deep knock from the bottom of the engine, not a light tick up top. It speeds up with engine RPM and gets louder under load or when the oil's low. Often the oil light flickers at idle, and many cars throw a flashing check-engine light and go into limp mode because of the knock-sensor software update that's designed to catch it early. A light tap that's only there on cold start is usually something else.
Yes — with proper support a short-block or engine swap is doable in your driveway across Mississauga and the GTA, and you get to watch it happen instead of losing the car to a shop for a week. But on a Hyundai/Kia knock the real first step is confirming the failure and checking your recall/warranty coverage, because if you're covered, the right answer is the dealer's free engine, not my bill.
Hyundai or Kia making a noise you don't like? Mobile engine repair · check if your shop quote is fair · get a flat quote
I diagnose the Theta II knock, check your recall coverage first, and flat-quote the real fix at your driveway across the GTA if you're not covered.
Call 647-450-0406