The firing order for the Sorento’s 3.5-liter V6 is 1-2-3-4-5-6, with the cylinders numbered so that odd-numbered cylinders (1, 3, 5) are on one bank and even-numbered cylinders (2, 4, 6) on the opposite bank when you view the engine from the front.
Understanding this order is essential for tasks like spark plug replacement, ignition coil service, and diagnosing misfires. The exact firing order can vary by model year and market, so always confirm with the vehicle’s service manual or VIN-specific data for your Sorento.
Engine layout and cylinder numbering
The Lambda II 3.5L V6 used in many Kia Sorento models is a 60-degree V6 with two banks of three cylinders. For reference, when looking at the engine from the front, cylinders 1, 3, and 5 are on one bank and cylinders 2, 4, and 6 are on the opposite bank. This numbering scheme helps technicians map spark plugs, ignition coils, and fuel injectors to the correct cylinders.
Syntax and layout matter for accurate maintenance and diagnostics, so knowing which cylinders belong to which bank simplifies procedures like coil replacement and misfire testing.
- Bank A (one side): Cylinders 1, 3, 5
- Bank B (the opposite side): Cylinders 2, 4, 6
Being clear about the bank layout helps during troubleshooting and during parts replacement, reducing the chance of wiring or component misidentification.
Firing order for the Sorento 3.5 V6
The sequence in which the cylinders fire is the firing order. For the Sorento’s 3.5L Lambda V6, the commonly used firing order is 1-2-3-4-5-6, interleaving between the two banks as the engine rotates. This sequence is typical for many Lambda II 3.5L V6 configurations, but exact orders can vary slightly by year or market.
- Cylinder 1 fires first
- Cylinder 2 fires second
- Cylinder 3 fires third
- Cylinder 4 fires fourth
- Cylinder 5 fires fifth
- Cylinder 6 fires sixth
Note: Some model years or regional specifications may differ. Always verify the firing order with the official service manual for your exact vehicle (VIN-specific data).
How to verify the firing order on your Sorento
To confirm the correct firing order on your specific Kia Sorento, follow these steps that align with standard service practices for Lambda V6 engines.
- Consult the official service manual or OEM data for your exact VIN to confirm the firing order.
- Identify which ignition coil corresponds to each cylinder (the Sorento’s 3.5L typically uses coil-on-plug coils, one per cylinder).
- Match the coil/plug wiring to the cylinder numbering and cross-check against the documented firing sequence.
- When performing maintenance (spark plugs, coils, or misfire diagnosis), rotate the engine by hand to reference the position of cylinder 1 and verify the subsequent firing order against the manual.
- If in doubt, consult a Kia dealership or a qualified mechanic, especially if your vehicle has a year-specific variation.
Verifying against VIN-specific documentation helps prevent misfires and ensures correct wiring during maintenance or repairs.
Summary
In the Kia Sorento 3.5 V6, cylinders are numbered 1 through 6 with 1-3-5 on one bank and 2-4-6 on the opposite bank when viewed from the front. The typical firing order is 1-2-3-4-5-6, though exact sequences can vary by year and market. Always confirm with the vehicle’s VIN-specific service data before performing maintenance or diagnostics, and rely on OEM manuals for the most accurate guidance.