NHTSA lists 1 safety recall and 22 owner complaints for the 2008 Lexus GS450H. Most complaints involve engine (5) and fuel/propulsion system (4). The EPA rates it 23 mpg combined.
TOYOTA IS RECALLING CERTAIN MODEL YEAR 2006 THROUGH 2008 LEXUS PASSENGER CARS MANUFACTURED FROM AUGUST 26, 2005 THROUGH AUGUST 4, 2008. MICRO-FOREIGN OBJECTS IN THE MATERIAL OF THE VALVE SPRING MAY DEGRADE THE STRENGTH OF THE VALVE SPRING, POSSIBLY CAUSING THE SPRING TO BREAK.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“I am writing to file a complaint against Lexus Corporation regarding a significant safety issue with my vehicle. Despite NHTSA’s recall notice for defective engine valve springs installed in certain 2008 GS350 vehicles with a specified range of VIN numbers that includes my vehicle’s, Lexus still persevered my car is not applicable for the recall and refused to cover the necessary repair costs after identifying the root cause of my car’s engine failure to be a broken valve spring out of a total of 24, as was initially diagnosed by a local auto repair shop. Their negligence of timely contacting impacted vehicle’s owner and outright refusal to cover this critical recall repair cost is truly outrageous as my own life and public safety have been in danger during these years. My vehicle experienced a near-catastrophic sudden engine failure with violent shaking and stalling at around 7:30am on April 27 while traveling on Highway 101. Fortunately, I managed to exit the highway safely during the heavy traffic and pulled into a nearby parking lot. It was towed to a local auto repair shop for initial diagnosis and a few days later transported to the Stevens Creek Lexus…”
“2008 GS350 - 129k miles - 1 owner Looking for input on whether/how to proceed as this is now a multi-year problem (2019- 2021). My 2008 Lexus GS350 had the following recalls (All fuel and engine related): NHTSA CAMPAIGN ID: 18V432000; NHTSA Campaign Number: 14V647000 NHTSA CAMPAIGN ID: 09V020000; NHTSA CAMPAIGN ID: 10V309000 Before the last fuel assembly recall work was out of warranty 2019, I started experiencing an extreme fuel odor after a decline AND each time car was started (noticeable only with windows down). No warning lights, system reported no issues. Independent mechanic found a leaking fuel injector (port on that side is "clean".) (Lexus dealerships found no issues). Replaced fuel injector, no change in fuel smell, strong as ever. Neither Lexus or Independent mechanic can determine what is wrong. Pandemic happened and I only drive the car once a week to the grocery store, strong fuel smell on startup still happens. (Haven't been on any incline/declines). 5/9/21, filled gas tank, started car, made 2 stops before heading home, "Check engine, Check VSC" and a myriad of lights came up on dash. (Total of 3 startups after filling tank, lights came on…”
“The contact owns a 2008 Lexus GS 450 Hybrid. The contact stated that after his vehicle was rear-ended by another vehicle, the check engine light was illuminated and the vehicle was not able to start. The vehicle was towed to the dealer where it was diagnosed that the failure was not related to the collision but that the hybrid transmission cooling pump needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| GS 450h Auto (S6), 6 cyl, 3.5 L · Rear-Wheel Drive | 22 | 25 | 23 | $3,450 | 386 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
1 safety recall as of Oct 28, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 22 complaints with NHTSA. The most-cited components are engine (5), fuel/propulsion system (4), power train (3). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2008 Lexus GS450H at 23 mpg combined, depending on engine and drivetrain (1 version rated).