NHTSA ID Number: 10188220
Manufacturer Communication Number: 05-83-21
Summary
This bulletin announces design changes made to the rear sub frame retaining bolts
NUMBER: 05-83-21
DATE: 02/22/21
| APPLICABILITY: | 2010-21MY Legacy 2008-21MY Impreza 2008-20MY WRX  2008-20MY WRX STI2013-20MY BRZ 2019-21MY Ascent 2006-14MY Tribeca |
| SUBJECT: | Rear Sub Frame Bolts- Design Change |
INTRODUCTION:
This Service Information Bulletin announces design changes made to the rear sub frame retaining bolts. water drainage grooves have been added and the bolt head flange thickness has been increased for purposes of part unification with other models. These 4 (four) main bolts secure the rear sub frame into the vehicle.
PRODUCTION CHANGE INFORMATION:
The new bolts were incorporated into production as per the table below. Additional starting VIN information will be added as it becomes available.
| Model | Starting VIN |
| Legacy | M3009195 |
| Impreza 4-Door | M3603443 |
| Impreza 5-Door | M3707702 |
| WRX / STI | L9823684 |
| Ascent | M3429891 |
PART INFORMATION:
- For SBR / Japan-produced vehicles, the new sub frame bolt’s part number is: 20058FL020.
- For SIA -U.S. produced vehicles, the new sub frame bolt’s part number is: 20058AL00B.
IMPORTANT: These sub frame bolts are one-time use items as indicated by the black star in the Service Manual and the illustration above. Anytime these bolts are removed, they must be replaced.
REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being repaired. The changes made to the sub frame bolts are outlined in the illustrations below.
Torque Specifications:
- All models EXCEPT Tribeca: 145 Nm (107 ft. lbs.)
- Tribeca: 95Nm (70 ft. lbs.)
IMPORTANT NOTES:
- On models where the vehicle’s suspension height is measured using the top of the bolt head of the rear sub frame bolts, these new bolts will REDUCE that specification by 2mm due to the added flange thickness. An example image of the related Service Manual information (Impreza) is provided below.
- These new bolts may only be used as substitutes for bolt p.n. 901000378 for rear suspension mounting. There are other places on the vehicle where p.n. 901000378 is used but, these new bolts are NOT to be substituted for use in those areas.
SERVICE PROCEDURE / INFORMATION:
REMINDER: Customer satisfaction and retention starts with performing quality repairs.
The service procedures for sub frame bolt replacement remain unchanged. Always refer to STIS and review the full requirements of the repair being performed. The Service Manual procedures contain information critical to performing an effective repair the first time, every time. This includes but is not limited to important SAFETY precautions, proper inspection criteria, necessary special tools, required processes and related one-time-use parts needed for a complete and lasting repair.
IMPORTANT REMINDERS:
- SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time.
- Always check for any open recalls or campaigns anytime a vehicle is in for servicing.
- Always refer to STIS for the latest service information before performing any repairs.
1 Affected Product
Vehicle
1 Associated Document
Manufacturer Communications
NUMBER: 05-83-21
DATE: 02/22/21
MC-10188220-0001.pdf 1176.774KB
NHTSA ID Number: 10188218
Manufacturer Communication Number: 02-157-14R
Summary
As part of our dedication to customer satisfaction, Subaru of America, Inc. is initiating a program to extend the original New Car Powertrain Limited Warranty coverage for excessive engine oil consumption on applicable vehicles to 8 years / 100,000 miles from the original warranty start date.
1 Associated Document
Manufacturer Communications
NUMBER: 05-83-21
DATE: 02/22/21
MC-10188218-0001.pdf 1176.774KB
- PRECISE & HIGH QUALITY - Manufactured in Taiwan, our torque wrench is engineered for superior precision. It ships pre-calibrated to +/- 4% accuracy, ensuring dependable results every time. Includes a calibration certificate with a trackable serial number for your assurance.
- DURABLE - Built to last, featuring a reinforced ratchet gear head made from hardened, heat-treated Chrome Vanadium alloy steel for maximum strength and durability.
- LONGEVITY - Protect your investment with our proprietary Electro-Black finish, providing advanced rust and corrosion resistance for extended tool life.
- PERFORMANCE - Easily read and set torque levels with our patent-pending dual-range scale. The high-contrast, yellow-on-black markings are designed for easy visibility, even in low-light conditions.
- OMFORT - Equipped with a reversible ratchet head that drives in both directions and measures torque in a clockwise direction. The ergonomic, knurled handle ensures a non-slip, comfortable grip, reducing hand fatigue.
- Durable Ratchet Head: Made from Hardened treated Chrome Vanadium steel alloy (Cr-V) Corrosion-Retardant: Satin Finish. Made in Taiwan
- Easy Storage: A sturdy plastic storage case is included. Non-Slip Grip: Knurled handle
- Easy to Read: High Contrast & Dual Range Scale. Accurate: Pre-Calibrated to ± 4%
- Accessories included: 1/2" Drive 5" long Extension Bar
- Simple and Reliable: “Click” sound tells the preset torque value is reached. Stop applying force when you hear and feel it.
- 【9-in-1 Torque Solution】Complete set includes 1/4", 3/8", and 1/2" drive click torque wrenches plus 6 essential adapters (extension bars, universal joint, drive adapters) securely stored in a sturdy portable case.
- 【High Precision & Dual Scales】Factory-calibrated to ±3% accuracy with included certificate; features dual-range scales (1/4": 10-220 in.lb, 3/8": 5-45 ft.lb, 1/2": 10-170 ft.lb) for versatile application coverage.
- 【Clear & Safe Audible Click】Upgraded loud "Click" sound provides a distinct, reliable signal (strong over 5 N.m, subtle under) when preset torque is reached, preventing overtightening and ensuring safety.
- 【Smooth 72-Tooth Ratchet & Quick Release】Reversible 72-tooth ratchet head offers a low 5° arc swing for use in tight spaces and smooth operation in both directions. Quick-release button ensures secure socket changes.
- 【Durable Construction & Wide Use】Hardened Cr-V steel ratchet heads and phosphated adapters resist wear; aerospace aluminum handles ensure lightweight strength and corrosion resistance. Ideal for precise torque on bikes, motorcycles, cars, trucks, wheels, and industrial applications. Backed by 24-month support.
- PRECISION - Ships pre-calibrated to +/- 4% accuracy and ready to use. Include calibration certificate with traceable serial number.
- DURABLE - Reinforced ratchet gear head constructed from hardened, heat treated Chrome Vanadium alloy steel.
- LONG-LASTING - Rust & corrosion protection with our unique and newly invented Electro-Black finish treatment.
- PERFORMANCE - Features an easy-to-read, highlighted yellow print dual-range scale. Identify the markings even in low-light conditions.
- COMFORTABLE - Comes with a reversible ratchet head that drives in both directions and measure torque in a clockwise direction.
- 3/8 inch drive torque wrench with 15-80 ft.-lb./20.4-108.5 Nm range; reminder: to prevent the ratchet from breaking, please do not overload the torque wrench
- Durable ratchet head made from hardened treated Chrome Vanadium steel alloy (Cr-V); bright, full polish chrome finish wipes easily clean and resists rust and corrosion
- High contrast and dual range scale pre-calibrated to ± 4%; tips: for precise scale adjustment, please use the imperial scale; the conversion formula between imperial scale and metric scale is 1 Nm = 8.86 in-lbs
- Includes sturdy plastic case for storage and portability
- NOTE: unlock before adjusting the torque value, lock after adjusting for stability of working torque; when finished, loosen locking ring and adjust to the lowest value for next use
Last update on 2026-06-14 / Affiliate links / Images from Amazon Product Advertising API
SEOCONTENT-START
Bulletin Number: 05-83-21 ; Date: 02/22/21 Page 1 of 3 SERVICE INFORMATION BULLETIN Continued… CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS. Subaru Service Bulletins are intended for use by professional technicians ONLY. They are written to inform those technicians of conditions that may occur in some vehicles, or to provide information that could assist in the proper servicing of the vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job correctly and safely. If a condition is described, DO NOT assume that this Service Bulletin applies to your vehicle, or that your vehicle will have that condition. Subaru of America, Inc. is ISO 14001 Compliant ISO 14001 is the international standard for excellence in Environmental Management Systems. Please recycle or dispose of automotive products in a manner that is friendly to our environment and in accordance with all local, state and federal laws and regulations. NUMBER: 05-83-21 DATE: 02/22/21 APPLICABILITY: 2010-21MY Legacy 2008-21MY Impreza 2008-20MY WRX 2008-20MY WRX STI 2013-20MY BRZ 2019-21MY Ascent 2006-14MY Tribeca SUBJECT: Rear Sub Frame Bolts- Design Change INTRODUCTION: This Service Information Bulletin announces design changes made to the rear sub frame retaining bolts. water drainage grooves have been added and the bolt head flange thickness has been increased for purposes of part unification with other models. These 4 (four) main bolts secure the rear sub frame into the vehicle. = 1-Time Use Part ATTENTION: GENERAL MANAGER q PARTS MANAGER q CLAIMS PERSONNEL q SERVICE MANAGER q IMPORTANT – All Service Personnel Should Read and Initial in the boxes provided, right. © 2021 Subaru of America, Inc. All rights reserved. Bulletin Number: 05-83-21 ; Date: 02/22/21 Page 2 of 3 Continued… PRODUCTION CHANGE INFORMATION: The new bolts were incorporated into production as per the table below. Additional starting VIN information will be added as it becomes available. Model Starting VIN Legacy M3009195 Impreza 4-Door M3603443 Impreza 5-Door M3707702 WRX / STI L9823684 Ascent M3429891 PART INFORMATION: • For SBR / Japan-produced vehicles, the new sub frame bolt’s part number is: 20058FL020. • For SIA -U.S. produced vehicles, the new sub frame bolt’s part number is: 20058AL00B. IMPORTANT: These sub frame bolts are one-time use items as indicated by the black star in the Service Manual and the illustration above. Anytime these bolts are removed, they must be replaced. REMINDER: Always order the most up-to-date replacement parts based on the specific VIN being repaired. The changes made to the sub frame bolts are outlined in the illustrations below. NOTE: The new bolt’s torque specification is unchanged. Torque Specifications: • All models EXCEPT Tribeca: 145 Nm (107 ft. lbs.) • Tribeca: 95Nm (70 ft. lbs.) Bulletin Number: 05-83-21 ; Date: 02/22/21 Page 3 of 3 IMPORTANT NOTES: • On models where the vehicle’s suspension height is measured using the top of the bolt head of the rear sub frame bolts, these new bolts will REDUCE that specification by 2mm due to the added flange thickness. An example image of the related Service Manual information (Impreza) is provided below. • These new bolts may only be used as substitutes for bolt p.n. 901000378 for rear suspension mounting. There are other places on the vehicle where p.n. 901000378 is used but, these new bolts are NOT to be substituted for use in those areas. SERVICE PROCEDURE / INFORMATION: REMINDER: Customer satisfaction and retention starts with performing quality repairs. The service procedures for sub frame bolt replacement remain unchanged. Always refer to STIS and review the full requirements of the repair being performed. The Service Manual procedures contain information critical to performing an effective repair the first time, every time. This includes but is not limited to important SAFETY precautions, proper inspection criteria, necessary special tools, required processes and related one-time-use parts needed for a complete and lasting repair. IMPORTANT REMINDERS: • SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time. • Always check for any open recalls or campaigns anytime a vehicle is in for servicing. • Always refer to STIS for the latest service information before performing any repairs.
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