A 2015 Optima shipped with two different 2.4-liter engines. Order a year alone and you have a coin flip. Every used kia engine for sale here is pulled from a titled donor, compression-tested, then matched to your VIN by engine code, trim and transmission pairing. We confirm in writing which unit you actually need before anything leaves the rack.
Sourcing a 2.4L replacement engine or an Optima ABS module? We pull, test, and ship major OEM drivetrain and electrical parts daily. Save up to 70% compared to new dealer prices. Select your component below to search the network.
Pick your vehicle type to see the Kia models we source parts for.
Take the 2015 Optima. It ran the Theta II 2.4 GDI and the Theta II 2.0T in the same body on the same lot, and a 2015 kia optima engine for sale search returns both without distinguishing them. The 2015 kia soul engine splits the same way between the Gamma 1.6 and the Nu 2.0.
Stop paying retail markup on backordered factory components. We quote actual price ranges up front. Need a replacement 2.4L for a 2011–2015 Sorento, a front clip for a 2020–2026 Telluride, or a transfer case for a 2009–2011 Borrego? Expect real savings without giving up original factory casting. The same applies to high-turnover sedans—2001–2020 Optima, 2021–2026 K5, 2010–2024 Forte, and the 2025–2026 K4.
Kia platforms share heavily with Hyundai, and they shift mid-generation. We don't guess. We run your 17-digit VIN against Hollander interchange data to confirm the control arm, ECU, or transfer case actually crosses over — critical on split-year models like the 1995–2002 and 2005–2026 Sportage; the 2000–2004 Sephia II/Spectra versus the 2005–2009 Spectra, and the 2002–2021 Sedona versus the 2022–2026 Carnival, which share a nameplate lineage but almost no parts.
Every unit is visually inspected and assigned an Automotive Recyclers Association condition grade, so you know what you're buying before it ships. That matters most on low-volume models where a second chance rarely comes around—the 2004–2009 Amanti, 2014–2020 Cadenza, 2015–2020 K900, 2018–2023 Stinger, 2010–2016 Forte Koup, and 2007–2010 Rondo. Every eligible part carries a 90-day warranty.
If you run a collision center or independent garage, you need parts that clear insurance estimate standards. We supply direct commercial to the lower 48, clear core return policies, and the grading documentation your service writers need — including electrified inventory like ICCU onboard chargers and drive motors for the 2015–2020 Soul EV, 2017–2026 Niro and Niro EV, 2022–2026 EV6 and 2024–2026 EV9, plus everyday volume parts for the 2001–2023 Rio, 2010–2026 Soul and 2021–2026 Seltos.
| Grade | Donor mileage | Condition standard |
|---|---|---|
| A | Under 60,000 | Compression within 10% across all cylinders. No oil-burn history on the donor. |
| B | 60,000–120,000 | Compression within 15%. Normal wear, documented in writing. |
| C | Over 120,000, or held for a discontinued application | Figures stated up front, priced accordingly. |
Theta II, Nu, Gamma, Lambda and Smartstream, graded and compression-tested.
A6GF, A6MF, A8LF, A8TR, D7UF and IVT units, pressure-tested with pan inspection.
Transfer cases, differentials, axle assemblies and axle shafts for AWD Sorento, Sportage and Telluride.
ABS units, airbags, climate control and instrument clusters, VIN-coded.
| Family | Code | Displacement | Fitted to | What catches people out |
|---|---|---|---|---|
| Theta II | G4KD / G4KE | 2.0L / 2.4L | Optima 2011–20, Sorento 2011–20, Sportage 2011–22 | GDI and MPI are not interchangeable — different heads, different injector wiring |
| Theta II T-GDI | G4KH / G4KJ | 2.0L turbo | Optima SX, Sorento SX, Sportage SX | Turbo block is a separate casting from the naturally aspirated 2.0 |
| Nu | G4NA | 2.0L | Forte 2014+, Soul 2.0, Sportage 2.0 2017+ | Shares displacement with Theta II 2.0 but shares no major part |
| Gamma | G4FC / G4FG / G4FJ | 1.6L / 1.6L T-GDI | Rio, Soul 1.6, Forte GT, Seltos 1.6T | Turbo and non-turbo Gamma use different pistons and oil feed |
| Lambda II | G6DH / G6DJ | 3.3L / 3.5L / 3.8L V6 | Sorento V6, Cadenza, Sedona, Telluride, Stinger 3.3TT | 3.3 GDI and 3.3 MPI split mid-generation |
| Smartstream | G4KP | 2.5L | K5 2021+, Sorento 2021+ | Replaced Theta II entirely — not backward compatible |
Every assembly ships as a long block, less the AC compressor and alternator. Block inspection, compression and leak-down figures go on the invoice. Cylinder heads and turbochargers are quoted separately.
A6GF1A6MF1A6MF26-speed auto, transverse. Optima, Forte, Soul, Sportage, Sorento 2.4
A6LF2A6LF36-speed auto, heavy-duty transverse. Sorento V6, Sedona
A8LF18-speed auto FWD/AWD. Sorento 2021+, Carnival, Telluride
A8TR18-speed auto RWD. Stinger, K900
D7UF1D8LF17-speed dry and 8-speed wet DCT. Forte GT, Seltos 1.6T, K5 GT, Stinger
IVTContinuously variable. Forte 2019+, Seltos 2.0, Soul 2020+
The code is stamped on the bellhousing, and kia transmission for sale order in seconds. A 2019 kia forte transmission request is the clearest case — that year the Forte switched from the A6GF to the IVT mid-generation, and the two share no internals. A 2015 kia optima transmission splits between the A6GF and the A6LF depending on engine.
Send us the code, or send the VIN and we will read it for you.
If your Optima, Sorento or Sportage runs a Theta II 2.0 or 2.4 and falls inside Kia's extended engine coverage, the dealer may owe you a replacement at no cost. Check that first.
We would rather lose the sale than sell you an engine you were entitled to for free. Call with your VIN and we will tell you which side of that line you are on before we quote anything.
Not one supplier ranking for Kia engine terms says this. It costs nothing and it is the strongest trust signal available to this page.
The live page promises the team will "quote actual price ranges up front," then shows no prices anywhere. That gap is why visitors call competitors who publish. Here are the parent-site figures:
| Part | Typical delivered range | Against new OEM |
|---|---|---|
| Engine — long block, 4-cylinder | $900 – $1,900 | 55–70% less |
| Engine — long block, V6 | $1,400 – $3,200 | 55–70% less |
| Automatic transmission | $800 – $2,400 | 50–65% less |
| Transfer case | $450 – $1,100 | 50–65% less |
| Rear differential / axle assembly | $400 – $1,300 | 50–70% less |
| Cylinder head | $250 – $800 | 45–65% less |
| Turbocharger | $350 – $1,200 | 50–70% less |
| ABS module | $150 – $500 | 40–65% less |
Prices are delivered. A 2015 kia sorento engine in 2.4 Theta II form sits in the four-cylinder band; the 3.3 Lambda sits in the V6 band.
A 2015 kia optima airbag and a 2018 kia optima cv axle are both standing orders here — the Optima generation is the single highest-turnover Kia platform we handle.
A used Theta II 2.4 from a low-mileage donor costs less and arrives as a complete assembly. Rebuilt units vary by builder. We publish donor mileage and compression figures so you can judge.
We read the engine or gearbox code off your VIN, read the donor's off the unit, and compare both before crating. Model year alone does not separate Kia platforms reliably.
90 days from delivery, parts only, covering internal mechanical failure such as rod knock, a cracked block or heavy smoking. Labor, installation damage and consequential damage to other components are excluded.
Searching used kia parts near me returns local yards holding one or two Kia donors. We ship nationwide from a multi-yard network, so your exact engine code and trim are actually available.
A used Kia four-cylinder long block runs $900 to $1,900 delivered, and a Lambda V6 runs $1,400 to $3,200. Both land 55 to 70 percent below dealer pricing on the same part.
Give us the code stamped on the bellhousing — A6GF, A6MF, A8LF, D7UF or IVT. One model year can carry two of them, so the code settles fitment faster than the year.
Every used kia engine for sale here is matched to your VIN by engine code, gearbox code and trim level. Nothing gets pulled, crated or charged until you have confirmed the exact fit.
