Does the Lexus RX350 have a timing belt?
The short answer is no. Lexus’s RX350 models use a timing chain rather than a timing belt across its modern generations.
In more detail, the RX350 has evolved through two major generations. The pre-2023 models largely relied on the 3.5-liter V6 (2GR-FE) with a timing chain, while the 2023 redesign introduced a new 2.4-liter turbocharged engine (A25A-FXS) that also uses a timing chain. Because these are chain-driven systems, routine belt replacements are not part of RX350 maintenance. If you’re considering a used RX350, it’s still wise to be mindful of chain-related wear—such as tensioners or guides—especially at higher mileage.
Engine lineup and timing method
Below is a quick breakdown of the RX350’s primary engine configurations and whether they use a belt or chain.
- 2GR-FE 3.5L V6 (most pre-2023 RX350 models): timing chain
- A25A-FXS 2.4L turbocharged inline-4 (2023-onward RX350): timing chain
- RX450h and related hybrid variants: timing chain-driven camshafts in the hybrid powertrain
All current RX350 variants rely on a timing chain rather than a timing belt. This arrangement generally eliminates the need for scheduled belt replacements, though wear-related maintenance on tensioners or guides can occur as the vehicle ages.
Why timing chains are preferred
Timing chains are designed to last longer than timing belts and typically require less routine maintenance. However, they still need periodic inspection—especially the chain guides and tensioners—to prevent potential noise or slippage as engines rack up mileage.
Notes for buyers and owners
If you’re shopping for a used RX350, confirm the exact engine and review the maintenance history for any chain-related work. A light rattle on startup can indicate tensioner wear, while a well-maintained oil change regimen helps extend chain life. For most owners, a scheduled belt replacement is not a consideration with RX350 models, but overall maintenance remains important for long-term reliability.
Summary
Conclusion: The Lexus RX350 does not use a timing belt. Across its generations, the engines—whether the 3.5L V6 (2GR-FE) or the newer 2.4L turbo (A25A-FXS)—use timing chains, which generally reduces the need for belt-related maintenance. Always verify the specific engine in your vehicle’s documentation and stay current with recommended maintenance to preserve engine timing integrity.
