G4NA G4NB 2.0L Theta II Cylinder Head for Hyundai Sonata Kia K5 Optima
In Stock | 100% Brand New | Factory Original | 12-Month Warranty
Request Wholesale QuoteTechnical Specifications
| Specification | Value |
|---|---|
| Engine Model | G4NA/G4NB 2.0L Theta II |
| Displacement | 2.0L (1998cc) |
| Configuration | Inline 4-Cylinder, DOHC 16V |
| Fuel Type | Gasoline, Multi-Point Injection |
| Aspiration | Naturally Aspirated |
| Max Power | 165-185 HP (121-136 kW) @ 6,000-6,500 RPM |
| Max Torque | 198-213 Nm @ 4,000-4,800 RPM |
| Compression Ratio | 10.2:1 |
| Emission Standard | Euro IV / China National IV |
| Dry Weight | Approx. 18 kg (cylinder head) |
| Part Number | 22100-2C000 / 22100-2C001 |
| Brand | Carval Auto Parts |
| Condition | 100% Brand New, Factory Original |
| Compatible Vehicles | Hyundai Sonata (2011-2014), Kia K5/Optima (2011-2015), Hyundai ix35, Kia Sportage R |
| Supply Type | 100% Brand New |
| Package | Plywood crate, suitable for sea/air freight |
What Is the G4NA/G4NB 2.0L Theta II Engine?
G4NA G4NB 2.0L Theta II Cylinder Head for Hyundai Sonata Kia K5 Optima，OEM: 22100-2C000 / 22100-2C001
This engine is manufactured to OEM specifications, ensuring direct-fit compatibility and reliable performance for Hyundai Sonata / Kia Optima. Factory-direct wholesale pricing available.
All Carval Auto Parts products come with a 12-month warranty and secure plywood crate packaging for sea or air freight worldwide.
Vehicle Fitment / Compatibility
This part is compatible with Hyundai Sonata 8th Gen (2011-2014), Kia K5/Optima (2011-2015), Hyundai ix35 (2010-2015), Kia Sportage R (2010-2015). Verify fitment using OEM number 22100-2C000 / 22100-2C001 or contact us with VIN.
Product Application & Use Cases
The G4NA/G4NB 2.0L Theta II cylinder head assembly serves the following applications:
Engine Performance
- Direct replacement for Hyundai Sonata / Kia Optima
- OEM-spec compression and power
- Long block assembly ready to install
Vehicle Applications
- Hyundai Sonata / Kia Optima engine replacement
- Fleet vehicle maintenance
- Workshop inventory
Replacement Scenarios
- High mileage engine failure
- Overheating damage
- Cracked block or head
Safety Note
- Verify oil prime before start
- Replace all gaskets and fluids
- Follow Hyundai Sonata / Kia Optima service intervals
Signs the Hyundai Sonata / Kia Optima Engine Needs Replacement
The following symptoms may indicate the need for replacement:
- Excessive black or blue smoke from exhaust — indicates worn piston rings or failed valve stem seals in Hyundai Sonata / Kia Optima
- Knocking or tapping noise from the engine block — typically caused by worn connecting rod bearings in Hyundai Sonata / Kia Optima
- Significant power loss under load — compression loss from worn cylinder liners - common in high-mileage the Hyundai Sonata / Kia Optima engines
- Coolant mixing with engine oil (milky oil) — cracked block or failed head gasket allowing coolant into oil galleries
- Engine will not start or stalls repeatedly — after ruling out fuel pump and ECU issues, internal mechanical failure is the likely cause
- Visible cracks or warping on the engine block — from severe overheating or fatigue; not repairable in the field
Continuing to operate with these symptoms risks further damage. Replace promptly.
Engine Replacement Guide — the Hyundai Sonata / Kia Optima
Replacing the G4NA/G4NB 2.0L Theta II cylinder head requires proper tools and procedure.
Prepare vehicle and drain fluids
Raise vehicle, disconnect battery, drain oil, coolant, and fuel
Disconnect engine connections
Label and disconnect wiring, fuel lines, coolant hoses, exhaust
Separate transmission
Unbolt transmission from bell housing, support with jack
Extract old engine
Use engine crane to lift old engine out carefully
Inspect engine mounts
Check mounts for wear, replace cracked rubber mounts
Install new engine
Lower new engine into bay, align with mounts and transmission
Reconnect systems
Reconnect all lines, hoses, and wiring with new gaskets
Test start
Bleed fuel system, start engine, check for leaks and warning lights
Frequently Asked Questions (FAQ)
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How to Order (Wholesale Process)
- Send us an email with OEM number (444), quantity, and destination country.
- We reply with wholesale price quote within 24 hours.
- Confirm order, pay deposit (T/T, L/C, PayPal, or Western Union).
- We prepare goods, inspect quality, ship within 7-15 days.
- Goods arrive in 20-35 days (sea) or 5-10 days (air).
Wholesale Business Information
- MOQ: 5 Pieces (mixed models accepted)
- Payment: T/T, L/C, Western Union, PayPal
- Price Terms: FOB Guangzhou / CIF / EXW
- Sample: Available (fee refundable on order)
- Lead Time: 7-15 days stock, 30 days bulk
- Quality: OEM equivalent, 12-month warranty
- Customization: OEM/ODM for bulk orders
- Packaging: Plywood crate, neutral or branded
Shipping & Logistics
Flexible shipping to meet your needs:
Sea Freight
Most economical for bulk
20-35 days
FCL/LCL available
Air Freight
Faster delivery
5-10 days
Best for urgent orders
Express (DHL/FedEx)
Fastest worldwide
3-7 days door-to-door
Best for samples
About Guangzhou Carval Auto Parts Co., Ltd.
Founded in 2008, Guangzhou Carval Auto Parts Co., Ltd. is a professional wholesale supplier of OEM-quality auto parts serving customers in over 80 countries. With 16+ years of experience, we specialize in comprehensive auto parts solutions for Japanese, Korean, German, and Chinese vehicles.
Our 80+ member team operates from a 5,000 sqm facility in Guangzhou, maintaining 10,000+ SKU inventory. We serve distributors, dealerships, repair shops, and e-commerce platforms globally.
Company Facilities & Gallery
Our 5,000 sqm facility in Guangzhou:
