The Lexus GS 350 is an executive rear-wheel-drive sedan produced for the U.S. market from the 2007 model year through 2020. It replaced the GS 300 within Lexus’s GS lineup and was sold across two platform generations before production ended.
The GS 350 is powered exclusively by 3.5-liter V6 engines across all U.S. production years. One engine code change occurred during the production run, making year-specific verification important before scheduling timing system service.
Confirming whether a vehicle uses a timing belt or chain affects maintenance scheduling and engine reliability planning. A timing belt requires replacement at fixed intervals, while a timing chain is designed for the life of the engine but still depends on consistent oil maintenance.
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Does the Lexus GS 350 Have a Timing Belt or Timing Chain?
All Lexus GS 350 models from 2007 through 2020 use a timing chain. No U.S.-market GS 350 engine uses a timing belt. Both the 2GR-FSE and 2GR-FKS engine variants are chain-driven across the entire production run.
2020 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FKS) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Final U.S. production year; high-mileage units may warrant timing chain and tensioner inspection |
The 2020 model year was the last for the Lexus GS 350 in the U.S. market. All 2020 units retain the 2GR-FKS and its timing chain configuration introduced with the 2016 mid-cycle refresh.
2019 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FKS) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
Timing system remained unchanged for the 2019 model year. The 2GR-FKS uses the same chain configuration introduced in 2016, with no scheduled replacement interval specified by Lexus for U.S.-market vehicles.
2018 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FKS) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
All 2018 GS 350 units are fitted with the 3.5L 2GR-FKS and its timing chain, unchanged from prior years. Consistent oil changes at manufacturer-specified intervals remain the primary maintenance requirement for chain and tensioner health.
2017 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FKS) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year; Lexus Safety System+ added as standard equipment |
No powertrain changes were made for the 2017 model year. A metallic rattle on cold startup is the most common early symptom of timing chain wear on 2017 GS 350 models and should prompt inspection.
2016 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FKS) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | 2GR-FKS replaces 2GR-FSE as part of mid-cycle refresh; timing chain system retained across the engine change |
Lexus introduced the 2GR-FKS for the 2016 GS 350 as part of the fourth-generation mid-cycle refresh. Both the outgoing 2GR-FSE and the new 2GR-FKS use timing chains, so the timing system type was unchanged by this engine update.
2015 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Final model year of the 2GR-FSE in the GS 350; timing chain configuration consistent with 2013 introduction |
The 2015 GS 350 uses the 3.5L 2GR-FSE with a timing chain shared with the 2013 fourth-generation introduction. No replacement interval is specified by Lexus; chain service is required only when wear symptoms are present.
2014 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
Same timing system as previous model year. Regular oil changes are the primary maintenance action required on 2014 GS 350 timing components; no manufacturer-scheduled chain replacement interval applies to the 2GR-FSE.
2013 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Fourth-generation GS 350 introduction on the L10 platform; 2GR-FSE and timing chain carried over from third generation |
The fourth-generation GS 350 debuted in 2013 on the new L10 platform. It retained the 2GR-FSE engine and timing chain from the prior generation, maintaining the same chain-driven camshaft timing configuration.
Note: No 2012 Lexus GS 350 was produced for the U.S. market. The model year was skipped during the transition from the third-generation S190 platform to the fourth-generation L10 platform.
2011 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Final year of the third-generation S190 platform; units at higher accumulated mileage should have timing chain components inspected |
Final production year for the third-generation GS 350. Units now at higher mileage should have timing chain tensioner and guide components inspected as part of standard high-mileage engine assessment.
2010 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
All 2010 GS 350 models use the 3.5L 2GR-FSE with a timing chain shared across both the RWD and AWD variants. No timing system changes were made for this model year.
2009 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
Same timing system as previous model year. Oil quality and change frequency directly affect timing chain and tensioner wear on the 2GR-FSE engine found in the 2009 GS 350.
2008 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | Same timing system as previous model year |
No changes were made to the engine or timing system for the 2008 model year. The 2GR-FSE timing chain system carried over from the 2007 introduction without modification.
2007 Lexus GS 350 Timing Belt Or Timing Chain
| Specification | Detail |
|---|---|
| Engine Option(s) | 3.5L V6 (2GR-FSE) |
| Timing System | Timing Chain |
| Interference Engine | Yes |
| Replacement Interval | No scheduled interval; designed for engine life |
| Maintenance Notes | First U.S. model year for the GS 350; replaced the GS 300 and its 3.0L 3GR-FSE engine |
The 2007 model year marked the U.S. introduction of the Lexus GS 350 with the 3.5L 2GR-FSE V6 and a timing chain. This engine replaced the 3.0L V6 from the outgoing GS 300 in the third-generation lineup.
Timing Belt vs Timing Chain on the Lexus GS 350
A timing belt is a rubber-toothed component that controls camshaft rotation relative to the crankshaft. It operates outside the engine’s oil system, degrades with age and heat, and requires periodic replacement at manufacturer-specified intervals to prevent failure.
A timing chain performs the same camshaft synchronization role using metal links instead of rubber. Chains run inside the engine lubricated by oil, and Lexus rates the 2GR-FSE and 2GR-FKS chains as lifetime components under correct maintenance conditions.
Timing belts require scheduled replacement, commonly at 60,000 to 100,000 miles. Timing chains have no manufacturer-specified replacement interval on the GS 350, but require consistent oil maintenance to prevent wear on links, tensioners, and cam phaser components.
Timing chain replacement on the Lexus GS 350 typically costs between $1,000 and $1,500 depending on parts and labor rates. A metallic rattle during cold startup is the most common early indicator of chain slack or hydraulic tensioner wear.
Lexus GS 350 Timing System Maintenance
Lexus does not publish a scheduled replacement interval for the timing chain in either the 2GR-FSE or 2GR-FKS engine. The chain is designed to last the life of the engine when oil maintenance is performed on schedule and the correct oil viscosity is used.
Metallic rattling during cold engine startup is the most consistent early indicator of timing chain wear on the GS 350. This noise results from slack in the chain before oil pressure fully builds within the hydraulic tensioner.
Both the 2GR-FSE and 2GR-FKS use oil-fed hydraulic chain tensioners. Delayed oil changes or incorrect oil viscosity reduce tensioner effectiveness, accelerating chain stretch and increasing the risk of guide rail wear across all GS 350 production years.
Timing chain inspection is advisable at or beyond 100,000 miles or when misfires, rough idle, or engine fault codes related to camshaft timing appear. Inspection should include the primary chain, secondary sub-chains, tensioners, and cam phaser actuators.
| Specification | Timing Belt | Timing Chain |
|---|---|---|
| Material | Rubber with teeth | Metal links |
| Replacement Interval | 60,000-100,000 miles (typical) | No scheduled interval |
| Lubrication | External (dry running) | Internal (oil-bathed) |
| Failure Risk if Neglected | Belt snap, engine damage | Chain stretch, tensioner failure |
| GS 350 Application | Not used | 2007-2020 (2GR-FSE / 2GR-FKS) |
Frequently Asked Questions
Does the Lexus GS 350 have a timing belt or chain?
All Lexus GS 350 models from 2007 through 2020 use a timing chain. No U.S.-market GS 350 was equipped with a timing belt in any production year.
When should the Lexus GS 350 timing chain be replaced?
Lexus does not specify a replacement interval for the timing chain. Service is only required when wear symptoms or mechanical failure are confirmed through inspection.
Does the Lexus GS 350 timing chain need maintenance?
No scheduled replacement interval applies. Consistent oil changes are essential to maintain tensioner function and prevent chain stretch across all GS 350 model years.
Is the Lexus GS 350 an interference engine?
Yes, the GS 350 is confirmed as an interference engine. A broken or jumped timing chain can cause piston-to-valve contact and extensive internal engine damage.
How much does Lexus GS 350 timing chain replacement cost?
Timing chain replacement on the GS 350 typically ranges from $1,000 to $1,500 including parts and labor. Costs vary by model year, drivetrain configuration, and service location.
What are the symptoms of a failing timing chain on a Lexus GS 350?
Common symptoms include a metallic rattle on cold startup, engine misfires, rough idle, and stored fault codes related to camshaft timing such as P0016 or P0017.
Conclusion
All Lexus GS 350 production years from 2007 through 2020 use a timing chain. The engine changed from the 2GR-FSE to the 2GR-FKS beginning with the 2016 model year, though both engines share the same chain-driven timing system.
Timing system maintenance on the GS 350 centers on consistent oil changes and monitoring for cold-start rattling or cam timing fault codes. Always verify timing system details using the owner’s manual or manufacturer service information before scheduling repairs.
