What year did Sienna go to timing chain?

The switch occurred with the 2011 model year.

Timeline: belt vs. chain in Sienna generations

Here is a concise overview of how the timing system evolved across Sienna generations.

• Pre-2011 Sienna models (1998–2010) predominantly used engines with a timing belt for camshaft timing.


• From 2011 onward, Sienna models use the 3.5L V6 2GR-FE with a timing chain, aligning with Toyota’s shift to chain-driven timing in this generation.

In short, the significant shift to a timing chain occurred with the 2011 Sienna model year.

What this means for owners

Maintenance expectations differ between belt-driven and chain-driven engines. Timing belts typically require periodic replacement (often around 60,000–100,000 miles depending on the engine and manufacturer), while timing chains are designed to last longer but can still fail due to tensioner or guide issues. For Sienna owners, this means newer models (2011 and newer) generally avoid regular timing-belt replacements, which reduces maintenance downtime and cost related to belt service.

Engine details by generation

First and second generations (1998–2010)

Early Sienna variants used camshaft timing systems that relied on belts for the V6 engines, corresponding to the 1998–2010 production span. This setup required belt replacement at typical service intervals.

Third generation and later (2011–present)

The 2011 redesign introduced the 3.5L V6 2GR-FE with a timing chain, representing the transition to a chain-driven timing system across the current-generation Sienna lineup.

Summary

The moving point in Sienna design is the 2011 model year, which brought the 3.5L V6 2GR-FE with a timing chain. This shift away from a timing belt means lower frequency of belt-related maintenance for most owners of newer models, while earlier generations required belt service. For anyone evaluating a used Sienna, confirming the engine type and timing system for the specific year is advisable, as configurations can vary by market and trim.

What is the most reliable year of the Toyota Sienna?

The most reliable Toyota Sienna years are the 2015 and 2016 models, the newer 2021-current models, and several others like the 2018, 2003, and 2010, which have high dependability ratings. Newer models feature hybrid efficiency and safety tech, while the 2015 and 2016 years offer a great balance of features, value, and reliability. The 2003 and 2010 models are also highly regarded for their durability and proven performance.
 
Specifically recommended model years

• 2015 and 2016: Excellent blend of reliability, features, and value. 
• 2018: Earned the highest score for dependability in the minivan segment in 2021. 
• 2021-current: Modern redesign with standard hybrid engine and advanced safety features. 
• 2003: Named the "Most Reliable Minivan" by Consumer Reports in 2002. 
• 2010: Often cited as an extremely reliable model, with examples having over 300,000 miles. 

Other reliable options

• 2009-2014: These years are generally considered safe to buy, with the 2009 and 2014 receiving specific praise. 
• 2017 and 2019: Also considered reliable choices. 
• 2011: Praised for its safety features and overall reliability. 

What to consider when choosing

• Budget: Newer models are more expensive, but offer modern features and hybrid efficiency. Older models like the 2003 or 2010 are a good value, but may require more maintenance or lack modern technology like Bluetooth. 
• Maintenance history: Regardless of the year, a well-maintained vehicle will be more reliable. Look for a complete service history, especially for critical components like the timing belt and water pump. 
• Features: Consider whether you prioritize modern safety features, a hybrid engine, or other amenities. Some newer models, like the 2021+, come standard with safety technology like automatic emergency braking and adaptive cruise control. 

Does a 2018 Toyota Sienna have a timing belt or chain?

The 2018 Toyota Sienna has a timing chain, not a timing belt. This is because the model uses the 3.5L V6 engine (2GR-FE/FKS), which is equipped with a timing chain designed to last the life of the vehicle.
 

• Timing Chain: The 2018 Sienna uses a timing chain, which is made of metal and is designed to be a long-lasting component. 
• Timing Belt: Vehicles with older engines, such as the 1998-2006 Sienna, used a timing belt, which requires periodic replacement. 
• Engine: The 2018 model year corresponds to the 2GR-FE/FKS 3.5L V6 engine, which features a timing chain. 

Does a 2009 Toyota Sienna have a timing belt or chain?

The 2009 Toyota Sienna uses a timing chain, not a timing belt. This is because the 2007-2020 Sienna models, which include the 2009 model year, are equipped with a 3.5L V6 engine that utilizes a timing chain. Timing chains are designed to last the life of the engine and do not require periodic replacement like timing belts. 
You can watch this video to learn about timing belt replacement on older Toyota Sienna models: 58sWrenching With KennyYouTube · Jun 21, 2022

• Timing chain: The 2009 Sienna's 3.5L V6 engine is equipped with a timing chain. 
• No timing belt: Previous Sienna models (1998-2006) used a timing belt, but the 2007 and newer models do not. 
• Longevity: Timing chains are designed to last the lifetime of the engine and generally do not need replacement, unlike timing belts. 

This video demonstrates the timing belt replacement process on older Toyota Sienna models: 57sSchrodingers BoxYouTube · May 25, 2014

When did Toyota Sienna change to timing chain?

If you drive a Sienna made from 1998 to 2006, with a V6, then be prepared to replace that timing belt every 60k like clockwork. Those that own a 2011 or 2012 4-cylinder Sienna are in luck, as your model year has a chain- so do V6s built from 2007 on.