What size is the oil drain plug on a Hyundai?

In most modern Hyundai engines, the oil drain plug uses M14x1.5 threads and a 14mm hex head. This configuration is common across many models from the 2010s and into the 2020s. Some older or special engines may use different sizes, so you should confirm for your specific vehicle.

Common thread sizes in Hyundai engines

Engine age and displacement influence drain plug sizing. The following sizes cover what you’re most likely to encounter in Hyundai models today:

• Thread size: M14x1.5 is the prevailing standard for most contemporary Hyundai engines.


• Alternate sizes: Some very old or niche engines may use M12x1.25; verify against your engine code.


• Plug head and seal: Most M14x1.5 plugs use a 14mm hex socket and require a new crush washer or gasket on reinstallation.

In practice, the M14x1.5 thread with a 14mm hex head is what you’ll commonly encounter, but always double-check for your exact model and engine code.

How to verify the exact size for your Hyundai

To confirm the plug size for your specific vehicle, follow these steps:

• Check the owner's manual or service booklet for oil change specifications and the plug type.


• Use Hyundai's official parts catalog or dealer resources by entering your VIN or engine code to find the exact drain plug size and part number.


• Inspect the current drain plug: measure the hex head with a torque wrench or socket to confirm the wrench size (often 14mm for M14x1.5). If in doubt, remove the plug and measure the thread diameter and pitch with calipers and a thread gauge.


• When replacing, install a new gasket/crush washer and ensure the thread matches to prevent leaks.

Proper verification helps prevent cross-threading and oil leaks during future oil changes.

Summary

For most Hyundai engines produced from the 2010s onward, the oil drain plug uses M14x1.5 threads and a 14mm hex head. There are exceptions based on engine model and era, so check your owner's manual or Hyundai’s official parts catalog for the exact specification. Always pair the correct drain plug with a new crush washer and follow the torque specification in your service manual.

What size socket for Hyundai Elantra oil drain plug?

17mm wrench
The drain plug is on the bottom of the oil pan. The pan is a flat metal piece under the engine. The plug is a small bolt at the back or side of this pan. Use a 17mm wrench to loosen it.

What size is the oil filter socket on a Hyundai?

The Hyundai oil filter socket size varies by model, but common sizes include 88mm with 15 flutes for many spin-on filters, 88.5mm or 88.8mm also with 15 flutes, or a 27mm socket for cap-style filter housings on many models. Some newer 1.6L diesel engines use an 80mm socket with 14 points. You may also need a smaller 79mm socket for certain filters, such as those used in Sonata, Santa, and Elantra models. 
Common sizes

• 88mm x 15 flutes: Many Hyundai models use an 88mm filter with 15 flutes. This is a very common size for spin-on filters. 
• 88.5mm or 88.8mm x 15 flutes: Some manufacturers offer tools for slight variations, like 88.5mm or 88.8mm, which are designed for specific Hyundai/Kia filters. 
• 27mm: For many newer Hyundai models with cap-style filter housings, a 27mm socket is the correct tool to remove the housing itself. 
• 80mm x 14 points: Some newer Hyundai and Kia 1.6L diesel engines use an 80mm filter housing with 14 points. 
• 79mm: This size is used for some specific filters, particularly for models like the Sonata and Santa. 

Tips for finding the correct size

• Check your owner's manual: The most accurate way to determine the correct size is to check your vehicle's owner's manual.
• Look up your specific model: Search online for your specific year, make, and model to find out the correct oil filter wrench size.
• Visually inspect the old filter: Before buying a new filter or socket, inspect the old one to see if it has any markings or if it's a spin-on or cartridge style. 

What size socket is the oil drain plug?

There is no single socket size for all oil drain plugs, as it varies by vehicle, but common metric sizes are 13mm, 14mm, 15mm, 17mm, and 19mm. To find the correct size, check your vehicle's owner's manual or a set of assorted metric sockets if unsure. 
This video shows how to use different tools to remove an oil drain plug: 1mOn The WorkbenchYouTube · Nov 1, 2024
Common sizes

• Metric: The most common sizes for passenger vehicles are between 13mm and 17mm. 
• SAE: Some older or specialty vehicles may use SAE (inch) sizes, which are often fractional (e.g., 3/8" or 1/2"). 
• Specialty: Some plugs might have a square opening, a hex (Allen/Allen key), or a Torx (star) shape instead of a traditional bolt head. 

How to find the right size

1. Check your owner's manual: This is the most reliable source for your specific car. 
2. Use a socket set: Start with common sizes like 13mm, 14mm, 15mm, and 17mm. A 6-point socket is best as it grips the bolt head more securely. 
3. Visit an auto parts store: You can tell them your vehicle's make and model, and they can look up the correct size. 
4. Try a universal set: If you frequently change the oil, consider buying a specialized oil drain plug socket set that includes common metric and SAE sizes. 

This video explains the importance of using the correct tool to remove an oil drain plug: 1mYour Home GarageYouTube · Nov 24, 2022

What size is a Hyundai drain plug?

The most common Hyundai drain plug size is M14-1.5 with a 17mm head, but this can vary by model and engine. It is best to confirm the specific size for your vehicle, as some models may have different requirements. For some engines, the filter housing itself may require a 27mm socket, and the oil filter housing drain plug might use an 8mm or other size socket, notes this YouTube video.
 
Common drain plug size

• Thread: M14-1.5
• Head: 17mm socket 

Other possible sizes

• Oil filter housing: May require a 27mm socket to remove the entire housing, and a smaller socket (like 8mm) may be needed for a separate drain plug on the housing, says this YouTube video. 

Important note

• Always check your vehicle's owner's manual or consult a parts store to confirm the exact size for your specific Hyundai model and year, as sizes can vary.