1993 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 The third generation Soarer sport coupe, largely identical to the SC 430, was superseded by its Lexus counterpart in Japan when the Lexus marque débuted there in 2005.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 1993 Lexus Sc400 problems
The 1993 Lexus SC400 is a luxury vehicle known for its smooth ride and powerful engine. However, like any car, it has its share of common problems. Here are some of the most frequently reported issues based on complaints from owners:
- Interior Pieces Cracking: The interior pieces of the SC400, particularly the dashboard and door panels, can crack and fade over time. This is a cosmetic issue but can detract from the car's overall appearance and value .
- VSV Actuator/Interior Heating: The VSV actuator, which controls the interior heating system, can fail, causing the heater to stop working. This is a common issue in older SC400s and can be caused by a faulty heater core or a blown fuse .
- Coolant Overflow Reservoir: The coolant overflow reservoir in the SC400 can crack and leak, causing the car to overheat. This is a relatively easy fix, but it's essential to address it promptly to prevent further damage to the engine .
- Window Regulators: The window regulators in the SC400 can fail, causing the windows to stop working. This is a common issue in older cars and can be caused by wear and tear or a faulty motor .
- Climate Control Display/Gauge Cluster: The climate control display and gauge cluster in the SC400 can fail, causing the car's heating and cooling system to stop working. This is a common issue in older cars and can be caused by a faulty display or a blown fuse .
- Power Steering Leaks: The power steering system in the SC400 is known to have leaks, particularly in the high-pressure line and the power steering pump itself. These leaks can cause the power steering pump to fail, which can be costly to replace. Additionally, leaks can damage the alternator, which can also be expensive to repair .
In summary, the 1993 Lexus SC400 is a reliable car, but like any vehicle, it has its share of common problems. Power steering leaks, starter failure, lower control arm bushings, interior pieces cracking, VSV actuator/interior heating, coolant overflow reservoir, window regulators, climate control display/gauge cluster, and power steering leaks are some of the most frequently reported issues. Regular maintenance and prompt repairs can help prevent these issues and keep the car running smoothly.
Is Lexus SC400 reliable?
These cars will last forever and need very little. At 245K no issues with drive train at all. No oil loss at all.
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 does a 1993 Lexus SC400 cost?
The value of a used 1993 Lexus SC 400 ranges from $3,063 to $11,545, based on vehicle condition, mileage, and options.
What engine is in the 1993 Lexus SC400?
4.0 L V81993 Lexus SC 400 / Engine
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.
1993 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:
- Exterior lighting problems
- Equipment problems
- Vehicle speed control problems
- Air bags problems
- Engine and engine cooling problems
The graph below shows statistics for all 1993 Lexus Sc400 vehicle components and the number of complaints received.
1993 Lexus Sc400 complaints
The NHTSA has received 11 complaints about various vehicle components related to the 1993 Lexus Sc400.
AIR BAGS PROBLEM
- Date Of Incident: 2019-09-15
- Number Of Injuries: 1
- Crash: 1
- VIN: JT8UZ30C9P0
- Components: AIR BAGS
- Summary: TL* THE CONTACT OWNED A 1993 LEXUS SC400. WHILE DRIVING AT A LOW RATE OF SPEED, THE CONTACT DEPRESSED THE BRAKE PEDAL AND CRASHED INTO A WALL. THE AIR BAGS DEPLOYED, WHICH SEVERELY BURNED THE CONTACT'S CHIN, LIPS, AND NECK. THE AIR BAG ALSO BURNED PARTS OF THE CONTACT'S CHEST AND TORSO AREA. THE CONTACT WAS TAKEN TO A LOCAL HOSPITAL FOR MEDICAL ATTENTION. A POLICE REPORT WAS NOT FILED. THE VEHICLE WAS TOWED TO THE CONTACT'S HOME AND DEEMED TOTALED. THE MANUFACTURER AND DEALER WERE NOT NOTIFIED OF THE FAILURE. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE FAILURE MILEAGE WAS UNKNOWN.
ENGINE AND ENGINE COOLING,POWER TRAIN PROBLEM
- Date Of Incident: 2010-04-25
- Crash: 1
- VIN: JT8UZ30C5P0
- Components: ENGINE AND ENGINE COOLING,POWER TRAIN
- Summary: I WAS INVOLVED IN A MOTOR VEHICLE ACCIDENT ON 4/25/10 WITH A 1993 LEXUS SC400 VIN# [XXX] . I WAS APPROACHING A RED LIGHT CONTROLLED INTERSECTION WITH MY FOOT ON THE BRAKE PEDAL AND THE VEHICLE CONTINUED TO ACCELERATE THROUGH THE INTERSECTION. I FEEL THAT THE COMPUTER CHIP CONTROLLING EITHER THE TRANSMISSION OR IDLING SPEED FAILED AS THE VEHICLE COULD NOT COME TO A HALT AND RESULTED IN A COLLISION. THE TRANSMISSION FAILED TO DROP DOWN TO NEUTRAL AND/OR THE IDLE COULD NOT DROP DOWN TO LESS THAN 1000 RPM. I REALIZE IT IS AN OLDER VEHICLE AND COMPUTER CHIPS COULD FAIL DUE TO AGE BUT I WONDER IF THIS COULD BE A DESIGN FLAW OF THE FAIL SAFE ACCELERATOR ASSEMBLY. COULD YOU LET ME KNOW IF ANY OTHER COMPLAINTS HAVE BEEN LODGED. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
SERVICE BRAKES, HYDRAULIC PROBLEM
- Date Of Incident: 2006-05-01
- VIN: JT8UZ30C5P0
- Components: SERVICE BRAKES, HYDRAULIC
- Summary: TL* THE CONTACT OWNS A 1993 LEXUS SC400. THE TRACTION CONTROL LOGIC PROGRAM FAILED AND CAUSED LOSS OF STOPPING POWER. THE CONTACT STATED THE REAR BRAKES WERE DRAGGING. THE CURRENT AND FAILURE MILEAGE WAS 112,000. THE DEALER HAS ADVISED THE CONTACT THAT THE TRACTION CONTROL COMPUTER NEEDED TO BE REPLACED.
EXTERIOR LIGHTING PROBLEM
- Date Of Incident: 2006-09-01
- VIN: JT8UZ30C1P0
- Components: EXTERIOR LIGHTING
- Summary: PART FAUILURE. *JB
EXTERIOR LIGHTING PROBLEM
- Date Of Incident: 2004-12-29
- VIN: JT8UZ30C8P0
- Components: EXTERIOR LIGHTING
- Summary: CONDENSATION DEVELOPED OVER THE RIGHT HEADLIGHT. CONSUMER CONTACTED THE DEALER, WHO STATED THEY DIDN'T KNOW WHY THIS WAS HAPPENING . *AK
UNKNOWN OR OTHER PROBLEM
- Date Of Incident: 1998-08-25
- VIN: JT8UZ30C7P0
- Components: UNKNOWN OR OTHER
- Summary: THE ILLUMINATION FOR THE INSTRUMENTS ON THE DASH HAS FAILED. VEHICLE SPEED IS NOT KNOWN. *AK
EQUIPMENT PROBLEM
- Date Of Incident: 2024-11-24
- Components: EQUIPMENT
- Summary: I HAVE HAD PERSISTENT MOLD AND BAD ORDOR COMING FROM AIR CONDITIONING SYSTEM. I'M ALLERGIC TO MOLD AND OTHER THINGS AT TIMES IT CAUSES NAUSEA, SORE THROAT, HEADACHE AND CONGESTION.
EQUIPMENT PROBLEM
- Date Of Incident: 2024-11-24
- VIN: JT8V230C3P0
- Components: EQUIPMENT
- Summary: BAD ODOR AND MOLD COMING FROM THE AIR CONDITIONING SYSTEM CAUSES NOUSEA, SORE THROAT AND HEADACHE TO THE OWNER. YH
TIRES PROBLEM
- Date Of Incident: 2024-11-24
- VIN: JT8V230C3P0
- Components: TIRES
- Summary: TIRE WORN OUT. YH
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1999-01-01
- Crash: 1
- VIN: JT8UZ30C4P0
- Components: VEHICLE SPEED CONTROL
- Summary: CONSUMER WAS PARKING VEHICLE INTO A PARKING SPACE WHEN VEHICLE ALL OF A SUDDEN ACCELERATTED FOR UNKNOWN REASON, CAUSING VEHICLE TO ROLLOVER TWO OTHER VEHICLES, WHICH WERE DAMAGED. DEALER/ MANUFACTURER NOTIFIED AND INFORMED THAT NOTHING COULD BE FOUND. *AK
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 2024-11-24
- Crash: 1
- Components: VEHICLE SPEED CONTROL
- Summary: VEHICLE SUDDENLY ACCELERATED TO FULL SPEED WHILE CONSUMER WAS COMING TO A STOP. DEALER HAS BEEN CONTACTED. *AK *ML
Positive 1993 Lexus Sc400 car reviews
Additional sources
More sources of information about 1993 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 ...
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 ...
common repairs for the SC400? - ClubLexus - Lexus Forum ...
Oct 11, 2001 ... My 93 Green SC400 has all the problems people just list for you and more. Those are the very common problem with SC400 (don't know about SC300).
Lexus SC400 Problems and Complaints - 3 Issues
Top Lexus SC400 Problems · Dashboard Gauges May Have LED Problems. 52 people have reported this. 23 · Heating and AC Control May Fail Intermittently. 41 people ...
Other years of Lexus Sc400
Are you having problems with your 1993 Lexus Sc400?
Emory Brakus 2025-01-01
I love how this car has aged (even though it really hasn't). The stylish lines are just as beautiful as they were when it was new. The one I purchased, from a previous owner who took great care of it, looks like it just rolled off the lot. If you take good care of a car like this, it can remain in pristine condition for years to come. It has all the features of a car built just a couple of years ago, despite being over a decade old. Lexus was truly ahead of the game with the SC400.
Isai Bogisich 2024-11-26
I have had this car for three years now. I got it as a graduation gift and I have loved every minute of driving it. Even though it's over ten years old and I live in Scottsdale surrounded by Rolls, Benz, and other luxury cars, I still get a lot of attention in it. I really can't see myself ever selling it. And have I mentioned the interior? I absolutely love it all!
Merlin Kling 2024-10-27
I hope you're doing well! I just wanted to share that I bought my SC 400 last summer and it has been my best purchase. I absolutely love the sleek design, powerful and very quiet V8 that provides plenty of power and decent gas mileage.
Timothy Gerlach 2024-10-15
It's great to hear about your experience with your car! You've had it for 5 years now and it's still going strong with less than 90k on the odometer. You mentioned how comfortable you feel driving it, even at higher speeds, and how quiet it is both at idle and on the highway. The only minor issues you've had are a slight delay in downshifting during heavy acceleration and the back end feeling a bit light. It's impressive that you're still getting 20-22 miles per gallon after all this time. It's interesting to note that the car is not as rare as it once was, perhaps due to the popularity of the Lexus CPO program. Thank you for sharing your thoughts with us!
Abe McKenzie 2024-09-21
This is my first Lexus experience, and I have to admit it has been the best purchase I have ever made. I have owned BMW, Mercedes, Cadillac, however the Lexus does not show age even after 12 years. I recommend doing a carfax before you purchase so you better aware of maintenance. Even with 100K, the car drives like new.