1998 Lexus Sc400 problems
The Lexus SC (Japanese: レクサス・SC, Rekusasu SC) is a grand tourer that was retailed by Lexus (a luxury vehicle division of Toyota), and built from 1991 until 2010. It features a front-engine, rear-wheel-drive design and seating for up to four passengers. The first-generation SC debuted as the V8-powered SC 400 in 1991, and the I6-powered SC 300 was added in 1992. Both first-generation models were produced until 2000. The second-generation model, the SC 430, went into production in 2001. The SC 430 features a hardtop convertible design and a V8 engine. The first-generation SC was largely styled in California at Calty, and the second-generation SC was mainly conceived at design studios in Europe.
In Japan, the related third-generation Toyota Soarer, with which the first-generation SC originally shared body design and multiple components, featured a separate line-up of vehicle configurations and different powertrains. The third generation Soarer sport coupe, largely identical to the SC 430, was superseded by its Lexus counterpart in Japan when the Lexus marque débuted there in 2005. The SC was the sole coupé in the Lexus lineup until the arrival of the IS C. According to Lexus, the SC designation stands for Sport Coupe. The LC replaced the SC lineup in 2017.
First generation (Z30; 1991)
1991–2000
In the early 1990s, following the début of Lexus, automotive press reports indicated a forthcoming Full-size Lexus coupé to compete with other luxury GT coupés of other marques like the Mercedes-Benz CL, Acura Legend coupe and later the Acura CL, Mazda Eunos Cosmo, Buick Riviera, Cadillac Eldorado, Lincoln Mark VIII, Jaguar XJS, Bentley Continental, Maserati Shamal/Ghibli, Ferrari 456 and BMW 8 Series coupe. At that point, Toyota had no genuine luxury coupés in its model range. A coupe would complement the successful Lexus flagship model, the V8-powered, rear-wheel drive LS 400 sedan. The coupé was going to be targeted towards the American market, and the development effort for its exterior design was handed over to the Calty Design Research center in California in 1987.
The American Calty design team took a different approach to designing the car, using plaster molding shapes to design the body, and working three-dimensionally instead of the traditional 2-D sketch approach. As described by design chiefs Denis Campbell and Erwin Lui, the result was a car that was based on "emotion and feeling" rather than linear aesthetics. The resulting design possessed almost no straight edges, and produced a drag coefficient of Cd=0.31. The production design concept by Lui was approved at the beginning of 1989, resulting in Lui being sent back to Japan for 4 months to assist in completion of the production design. According to automotive journalist Bill Russ, the SC design was considered influential among automotive designs of the time.
Production of the Soarer started in April 1991 at the Motomachi plant in Toyota, Aichi, with the Lexus SC produced alongside the Soarer at a second Higashi Fuji plant at Susono, Shizuoka. Motomachi-sourced cars lasted until April 1997. The Lexus SC platform was used to develop Toyota's next generation Supra, both vehicles were manufactured in the same plant.
The SC 400 débuted on 1 June 1991 in the United States as a 1992 model. The SC 400's 4.0 L V8 1UZ-FE, the same engine as used in the LS 400, was reported to have cost over US$400,000,000 in research and development. The engine sits behind the front axles, which makes it a front mid engine rear wheel drive vehicle. The SC 400 was honored as the Motor Trend Import Car of the Year for 1992. It also made Car and Driver magazine's Ten Best list from 1992 through 1996.
In July 1992, the SC 300, a smaller-engined version of the SC 400, premiered in the United States. The SC 300 was equipped with a 3.0 L inline 6 2JZ-GE. Lexus' traction control system, TRAC, was offered as an option.
The first-generation SC lasted in production until 7 July 2000, over nine years, quite long compared to the other cars of the 1990s. Even with the SC's long production cycle, only minor exterior changes were made. New tail lighting and a modified spoiler design was part of the mid-cycle vehicle refresh. A front grille was added in 1996, along with a redesigned front bumper, side skirts and rocker panels. The SC 400 produced 250 hp (186 kW)/260 lb⋅ft (353 N⋅m) from 1991 to 1995. The original 1991–1997 engines for the 2JZ-GE-powered SC 300 were rated at 225 hp (168 kW)/210 lb⋅ft (285 N⋅m). The output of the SC 300 was 5 horsepower more than the equivalent engine used in the Toyota Supra.
In 1996, the SC 400's 1UZ-FE engine design was upgraded to 260 hp (194 kW) from 250 hp (186 kW). These engines were coupled with a 4-speed automatic transmission on both the SC 300 and SC 400 models. A 5-speed manual transmission was only offered on the SC 300 from its debut until 1997.
By the end of the decade, North American SC sales began dwindling due to the lack of significant design updates since the car's introduction and marketplace changes that led to loss of interest in coupes.
In 1997 (1998 model year), both the SC 300 and 400 were upgraded with VVT-i and thus the ratings were raised to 290 hp (216 kW)/300 lb⋅ft (407 N⋅m) of torque for the SC 400 and 225 hp (168 kW)/220 lb⋅ft (298 N⋅m) of torque for the SC 300. Tests conducted on the new engines showed an acceleration for the SC 400 for years 1992–1995 of 0–60 mph in 6.9 seconds, years 1996–1997 in 6.7 seconds, and years 1998–2000 in 6.1 seconds. For the SC 300 an acceleration 0–60 mph in 6.8 seconds with the 5-speed manual and 7.2 seconds with the 4-speed automatic for all years. This 1997 upgrade included the replacement of the four-speed automatic on the SC 400 to a five-speed unit. With the replacement of the five-speed unit those models also got a new differential with a final drive of 3.27 improving both fuel economy and top speed.
Sales of the automatic transmission SC 300 and SC 400 models formed the vast majority of models purchased. The Lexus SC 400 was never officially sold in the British Isles, but many examples found their way across the Atlantic as personal imports.
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Common 1998 Lexus Sc400 problems
Based on complaints from owners of the Lexus SC400 1998, here are some common problems with this car:
- Cracked Dash Vents: Another common problem is cracked dash vents. This issue can impact the aesthetics of the interior and may also affect the proper functioning of the vehicle's ventilation system.
- Broken Window Regulators: Owners have experienced problems with broken window regulators. Malfunctioning window regulators can prevent the smooth operation of the windows, causing inconvenience and potential safety concerns.
- Dead LCD Displays and Gauge-Cluster Lights: Dead LCD displays and gauge-cluster lights have been reported as common issues. This can make it challenging for drivers to monitor essential information about the car's performance and status.
- Worn Lower Control-Arm Bushings and Lower Ball Joints: Worn lower control-arm bushings and lower ball joints are also common problems with the Lexus SC400 1998. These components are crucial for the vehicle's suspension system, and when worn, they can lead to handling issues and compromise the overall driving experience.
- Power Steering Pump Leaks: Power steering pump leaks have been identified as a more serious problem with the SC400. These leaks can not only result in steering difficulties but can also damage other components like the alternator, leading to costly repairs.
- Cracks in the Coolant Overflow Reservoir: Cracks in the coolant overflow reservoir have been reported as a common issue. This can lead to coolant leaks, overheating, and potential engine damage if not addressed promptly.
These common problems with the Lexus SC400 1998 highlight various areas where owners may encounter issues with their vehicles. Regular maintenance and timely repairs can help mitigate these problems and ensure the longevity and performance of the car.
Is the Lexus SC400 a reliable car?
This is the most reliable car I've owned
It's relatively rare and super reliable. Turn-key and go every single time. I have never been stranded on the road with this thing. It is also really comfortable and a great road trip car.
How long can a SC400 last?
With proper maintenance these cars will easily go 300,000 miles or more with little trouble. The engine is based on the old Toyota IRL racing engine, is durable, and built with forged internals!
How much gas mileage does a 1998 SC400 get?
Options: Color-keyedspoiler, power moon roof, traction control, remote CD changer, wheel locks, floor mats. Base price: $52,700 As tested: $57,230 EPA rating: 19 mpg city, 25 mpg highway Test mileage: 19.7 mpg Competitors: Jaguar XK8, Mercedes SL, SLK, Lincoln Mark VIII, Cadillac Eldorado.
Is the SC400 fast?
The SC400 weighs 246 pounds less than the sedan. It puts the power multiplied by its shorter first-gear and final-drive ratios to good use. The coupe soars from zero to 60 mph in 6.7 seconds compared with 7.9 for the sedan. The coupe clears the quarter-mile in 15.2 seconds at 93 mph, versus the sedan's 15.9 at 90 mph.
1998 Lexus Sc400 car problems categorized by type of issue
After analyzing all complaints sent to the NHTSA and researching popular Lexus Sc400 problems, we found that the most common problems with these 2023 model year vehicles are:
- Vehicle speed control problems
- Engine and engine cooling problems
The graph below shows statistics for all 1998 Lexus Sc400 vehicle components and the number of complaints received.
1998 Lexus Sc400 complaints
The NHTSA has received 2 complaints about various vehicle components related to the 1998 Lexus Sc400.
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 2011-02-11
- Crash: 1
- VIN: JT8CH32Y2W1
- Components: VEHICLE SPEED CONTROL
- Summary: TL*THE CONTACT OWNS A 1998 LEXUS SC400. THE CONTACT STARTED THE VEHICLE, SHIFTED IT INTO REVERSE AND CRASHED. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO AN INDEPENDENT REPAIR SHOP WHERE THEY HAVE NOT DIAGNOSED THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 100,000.
ENGINE AND ENGINE COOLING PROBLEM
- Date Of Incident: 1999-08-14
- VIN: JT8CH32Y0W1
- Components: ENGINE AND ENGINE COOLING
- Summary: THE DAY I DROVE OFF THE LEXUS LOT ONLY A COUPLE HOURS LATER, IT WAS POURING THE RAIN. I CAME ACROSS STANDING WATER ON THE ROAD. SEVERAL CARS ZOOMED RIGHT THROUGH, INCLUDING THE FORD ESCORT IN FRONT OF ME. SO I PROCEEDED ONLY TO FIND THAT MY ENGINE WOULD CEASE AND FOR THE NEXT THREE MONTHS I WOULD PAY A HEFTY PAYMENT WITH NOTHING TO DRIVE. LEXUS SAID THEY COULDN'T DO A THING FOR US THAT IT WAS AN ACT OF GOD. I WANT TO KNOW WHY EVERY OTHER CAR DID NOT GET AFFECTED BY THE "ACT OF GOD". YOU'D EXPECT A $58,0000 TO BE ABLE TO DO WHAT A FORD ESCORT CAN DO AT LEAST. LUCKILY OUR INSURANCE COVERED THE $17,124 BILL. THE ENGINE ONLY HAD 4,329 MILES ON IT,I BOUGHT A PREOWNED. THE ENGINE HAD TO BE REPLACED,INTAKE/GASKETES, ALL HEADLIGHT LAMP ASSEMLIES,SENSOR ETC.. REPLACED. THE NIGHT OF THE INCIDENT I CALLED LEXUS CUSTOMER HOTLINE THEY GAVE ME A CONFIRMATION # TO GET REIMBURSED FOR ANY HOTEL , RESTAURANT RECEIPTS, OR RENTAL CAR FEES BUT WHEN I TRIED TO GET REIMBURSED THEY SAID THEIR CUSTOMER REP. HAD MADE A MISTAKE THAT THEY WERE NOT PAYING FOR ANYTHING. SEE WE BOUGHT THE CAR FROM OUT OF TOWN. I NO LONGER OWN THIS VEHICLE BUT I JUST RAN ACROSS THIS WEBSITE AND I THINK THE CONSUMER SHOULD KNOW ABOUT THIS. THE INSURANCE WAS STATE FARM THE CLAIM # 22-V169-45401.*AK
Positive 1998 Lexus Sc400 car reviews
Additional sources
More sources of information about 1998 Lexus Sc400 problems:
Lexus Sc400 Common Problems? - 92 - 00 Lexus SC300 / SC400 ...
Sep 25, 2010 ... 1) Lower control arm bushings, check for play, replace with Daizan bushings from TM Engineering or replace with Supra 94-98. · 2) Lower ball ...
SCFAQ: Common problems experienced with the SC300 & SC400 ...
Jan 17, 2005 ... Common problems experienced with the SC300 & SC400 · Blacked-out needles: · Blacked-out Displays: · Leaking power steering pump: · Worn leather ...
What Should I Keep In Mind If I Buy A 96 Sc400? - 92 - 00 Lexus ...
Aug 11, 2009 ... Other common problems are side view mirrors control unit (in the steering column, not the doors), Rear trunk hold-open cylinders, trunk mounted ...
Thinking about getting a Lexus SC400 (1991-00). Thoughts? : r/Lexus
Oct 8, 2019 ... The SC400 has a common issue with the power steering pump where if it leaks, it leaks directly into the alternator. (This is not an issue on ...
All my crazy Lexus issues SOLVED!! (ECU-leaking capacitor ...
Sep 20, 2012 ... ○ Lexus LS400 - 1990-2000 (in 1997 and earlier models, the problem is extremely common) ○ Lexus SC300 - 1993-2000 ○ Lexus SC400 - 1992-2000
Other years of Lexus Sc400
Are you having problems with your 1998 Lexus Sc400?
Al Homenick 2024-11-02
Quiet and very solid ride, with lots of power when you need it. The engine is great, and I believe it's going to last over 500,000 km.
Ezekiel Keeling 2024-11-01
I've got a 187,000 miles on my SC400 and it's never required anything other than routine maintenance and a new timing belt. I'm sure that with proper care, this car could easily reach over 300,000 miles!
Braden Wisoky 2024-09-24
This car represents luxury and performance wrapped up in one bundle. Driving it is an experience all by itself. With the windows up and driving, you absolutely feel isolated from the outside world. The handling has a nice blend of luxury and sportiness, and the interior is laid out nicely. The build quality is superb. People ask me how we like the car all the time. I can't say anything negative about this vehicle. You'll have to drive it for yourself to see what all the hype is about the Lexus SC400.
Avery Larson 2024-09-09
As a certified gear head, I have owned several classic cars including a '55 Porsche Speedster, '67 Duetto Spider, and various Austin Healys and MGs. Although I always dreamed of owning a Ferrari, the cost of maintenance scared me, especially for a high-performance model like the 355. After some research, I discovered the SC400, which not only looked great but was also rare enough to stand out. I purchased a '92 SC400 and made some modifications to the suspension and brakes to improve its performance. However, I still wanted more power, so I searched nationwide and found a low mileage '98 model in Arizona. It had everything I wanted, including a Ferrari color scheme, red with tan interior, and all the power I needed. I upgraded the suspension to a Toyota Supra and the brakes to those of a Lexus 400 sedan, and added 18-inch wheels with 40-series tires. The car now goes plenty fast, handles wonderfully, and stops amazingly. It's the best package I've ever had, and it's even appreciating in value. Although I have no plans to sell it, unless I win the proverbial lottery and can afford a Ferrari, it will probably be my last car. I'm in my 70s and only drive 5000 miles a year, so with legendary Lexus reliability and longevity, it should last my lifetime. Then, I will leave it to my son.
Travon Spinka 2024-07-28
I'm glad to hear that you've never had a single problem!