Does the Lexus NX have a chain or belt?
Yes — all current Lexus NX models use a timing chain rather than a timing belt. This article explains which NX variants it covers and what it means for maintenance and ownership.
Which NX models use a timing chain
All current NX engines rely on a timing chain rather than a belt. The main variants available in many markets are listed below along with their powertrains and how the timing system is configured.
- NX 250 — 2.5-liter inline-4 gasoline engine; timing chain drives the camshafts.
- NX 350 — 2.4-liter turbocharged gasoline engine; timing chain drives the timing mechanism.
- NX 350h — Hybrid variant pairing the 2.5-liter engine with electric motors; timing chain drives the camshafts.
- NX 450h+ — Plug-in hybrid with the same 2.5-liter engine family; timing chain drives the camshafts.
Note: In some markets, naming and availability can vary (for example, earlier generations used different designations). The current-generation NX lineup generally uses a chain-driven timing system across gas, hybrid, and plug-in hybrid variants.
Maintenance implications
Because the NX uses a timing chain rather than a belt, there is no scheduled timing-belt replacement interval. Timing chains are designed to last the life of the engine with proper maintenance. Nonetheless, chain-related components such as tensioners, guides, and water pumps can wear over time and may require attention as part of regular preventive maintenance or if a service issue arises.
Owners should follow Lexus’s recommended service schedule, focusing on regular oil changes and cooling-system maintenance. If you notice unusual rattling or chain noise on startup or idle, have a dealer inspect the timing-chain area to assess tensioners or guides for wear.
Helpful notes for buyers
Using high-quality synthetic oil and adhering to the manufacturer’s oil-change intervals helps protect the timing chain and its supporting components. If evaluating a used NX, request service records that show timing-chain-related inspections or any related component replacements.
Summary
Across its current lineup, the Lexus NX uses a timing chain to drive the camshafts rather than a timing belt. This configuration reduces the need for belt-replacement maintenance and is complemented by standard maintenance practices. Prospective buyers and current owners should stay on top of regular oil changes and monitor for any timing-chain-related wear symptoms.
