Supplier Annual Conference 2022-2

Supplier Annual Conference 2022 Mr. Surasak Saetiaw Acting GM-PH Department, Thai Summit PK Group March 04th, 2022 My Quality Declaration “I commit to the morals and good governance in purchasing management. With Honest, Justice and loyalty to the organization” “ผมจะใชจ้ รรยาบรรณและธรรมาภบิ าลในการบรหิ ารงานจดั ซอื ดว้ ยความซอื สตั ย ์ยุตธิ รรม และภกั ดตี อ่ องคก์ ร” Supplier Annual Conference 2022 Purchasing Agenda 1. Road Map Strategic Planning 2. Mid-Term Business Overview 2022-2025 3. New Project Status & Challenges 1

Supplier Annual Conference 2022 1. Road Map Strategic Planning 2022-2025 Road Map Strategic Planning 2022-2025 Road Map Strategic Planning “Together we grow” Target 2022 98% Activity 2022 Evaluation Score 0% Promote Supplier Award SQCD CKD Claim 100% SC Point Strictly Audit Welding Standard (CQI15) Quality PIST 100% Strictly PPAP Approval Process MY’20 (19 Item) Delivery On a Global Scale. Review STD Packing for Factory 4.0 and Delivery Actual Competitive Price Localize Prototype to Suppliers Model 5F00 & MY24 PHEV RFQ for Model W60D Milk Run Phase#1 Model MY’20, QX 24MY RFI for Model MY24 GNOME 2

Supplier Annual Conference 2022 2. Mid-Term Business Overview 2022-2025 Mid-Term Business Overview 2022-2025 Description 2022 TARGET FY21 RESULTS STATUS Safety Need to Quality Serious 38 cases Improve Cost Case Delivery Accident = 0 99.93% FY 21 9.29 PPM Achieved PIST 100% Claim < 10 Start New FY 21 Price Structure Achieved PPM Model P703, Need to Challenges U704 Improve Price Model 5F00, W60D 99.61% Delivery 100% 3

Supplier Annual Conference 2022 3. New Project Status & Challenges New Project Status & Challenges New Project Challenges Commercial and Rates Technical • Stamping rate • VA/VE commitment • Welding and Spot weld rate • Material yield challenges • Scrap return policy • Press machine competitiveness • Material handling charges 3%  1.5% (AAT/FTM/MMTh) • Process and equipment design cost to target • Sales & buyback scheme (MMTh, NMT) • Design changes for new product • Appointed supplier for price control (AAT/FTM) • Friction welding technology • New structure cost (AAT/FTM/MMTh) • Tooling control (GVT & Vendor tooling) Friction welding • Sourcing effect - Cooperate CR by lumpsum payment - Current model new rate impact SU Axle UT Axle 4

New Project Status & Challenges Customer 2020 2021 2022 2023 2024 2025 Project progress : MY20 Model (P703R RR Module 24MY TT Event : P703, U 704, P703R are completed (P703/U704 /P703R) KD) Program Gnome PP Event : P703, U 704, P703R is on progress P703 TT Event : 23 Aug 2021, PP Event : 15 Nov 2021 (Model(P703 KD) MP1 IPD : 7 Feb 2022, MP1 Ford : 21 Feb 2022 MP2 IPD : 28 Mar 2022, MP2 Ford : 1 Apr 2022 P05 FR TSPK loss this project (EA company award) SOP 30 Jun’22 Vol.100,000u/5yea SOP Oct’22 r P01 FR, Vol. 24,800 u/3yars RG06 IMSAF CKD P03 FR, Vol. 37,900 SOP Nov’21 vol. u/3yars 18K/year Production period: Jan '24 -Dec '25 (2years) Project progress Production volume: 60,000u / 2yearsC For UT, Prepare production for support DCV and PJ Lot on Nov’21. UT (5F00) Model QX 24MY Model For QX 24MY, TSPK will submit the quotation to MMTh on 18th Feb 2022 SOP : Feb 2023 SOP : Jan 2024 Progress of RFI and RFQ Development has been frozen indefinitely. Nissan H60A LCP will update and confirm RFQ status on end of Jun’22. W60D Model SOP : May 2024? SOP : Oct 202P060A (221A) 22MY For H60A Axle Argentina, Mass production period(plan) SOP :Jul 2021 Apr '23～Nov ‘24 and Nissan APO will judgement and confirm the result of this project to PKJ on end of Mar'22. BR20 Model SOP 2025 9 Quality Control Ms. Paradee Somsuk QC AMGR, Thai Summit PK Group March 4th, 2022 My Quality Declaration “I will deliver the highest quality products and services. To meet the customer's required specification & ultimate satisfactions” “ดฉิ นั จะส่งมอบผลติ ภณั ฑแ์ ละใหก้ ารดูแลลูกคา้ ดว้ ย คุณภาพดที สี ุด เพอื ตอบสนองความตอ้ งการและสรา้ ง ความพงึ พอใจอยา่ งสูงสดุ ใหก้ บั ลูกคา้ ” 5

Quality Weekly Meeting Agenda 1. Supplier quality score evaluation manual Y2022 1.1 Target Y2022 1.2 Quality evaluation score manual Y2022 2. Quality performance Y2021 2.1 Supplier quality score evaluation result 2.2 Top 10 supplier 2.3 Supplier trend 2.4 Lessons learned quality issue 3. Quality activity Y2022 4. Contact person 4.1 TSPK Contact 4.2 Supplier contact 1. Supplier quality score evaluation manual Y2022 6

1. Supplier quality evaluation manual Y2022 1.1 Target Y2022 *** A level = Supplier evaluation score 99 points up 1. Supplier quality evaluation manual Y2022 1.2 Quality evaluation score manual Y2022 *** The period from the 26th day of the immediately preceding period through the 25th day of the current period. 7

1. Supplier quality evaluation manual Y2022 1.2 Quality evaluation score manual Y2022 40 S1 : Claim (PPM) < 10 PPM 20 S2 : PDR & 8D reply 1 PDR + Reply 8D within due date 20 S3 : Problem frequency No repeat issue + No disruption TSPK 20 S4 : Co-operation Support activity 100 S5 : Field claim Without field claim 1. Supplier Quality Evaluation Manual S1 : Claim ( PPM ) - 40 Points Claim ( PPM ) = FY2021 Target ≤ 20 PPM Start : April 2022 FY2022 Target ≤ 10 PPM Reduce PPM Target from Claim PPM Score Claim PPM Deducts Score < 20 30 20 PPM to 10 PPM < 10 0 and change PPM Range 21 - 120 29 - 20 >10 - 60 - 10 121 - 220 19 - 10 >60 - 110 - 20 221 - 320 >110 - 160 - 30 9-0 - 40 > 320 0 > 160 8

1. Supplier Quality Evaluation Manual S2 : Number of PDR Issue and 8D Report reply - 20 Points S2 = S2.1 + S2.2 = -20 Point S2.1 : Number of PDR Issue -10 Points PDR issue Score Start : April 2022 PDR issue Deduct Score 1 9 1 0 2 8 2 -2 3 7 3 -4 4 6 4 -6 5 5 5 -8 6 4 ≥6 -10 7 3 8 2 No deduct score 1st Issue 9 1 If over deduct score 2 points / PDR ≥10 0 *** Major case within 3 Days / Minor case within 7 Days *** S2.2 : 8D Report reply -10 Points 8D Report Reply Within Due date Over 1 Week Over 2 Weeks Over 3 Weeks Deduct Score 0 -2 -4 -10 1. Supplier Quality Evaluation Manual S3 : Problem Frequency - 20 Point S3 = S3.1 + S3.2 + S3.3 = -20 Point S3.1 : Q’ty of Problem Type ≤ 1Type / Month Q’ty Problem 1 2 3 4 Deduct Score 0 -2 -4 -6 S3.2 : Q’ty of Repeat problem time “No repeat problem” 23 4 -4 -6 -8 Repeated Time 0 1 Deduct Score 0 -2 S3.3 : Q’ty of disruption TSPK line “No disruption” Disruption 0 1 Deduct Score 0 -6 New addition Evaluation Criterial *** Supplier must be accept claim only *** 9

1. Supplier Quality Evaluation Manual S4 : Co-Operation & Counter Measurement - 20 Points 4.1 Inspection data - Supplier need to submit monthly inspection data within 25th day. And in February for yearly inspection / annual test. Item Frequency Due date Data Type Monthly inspection data 1 / Month Before 25th Electronic file Full Layout 100% on Dwg. February Electronic file 1 / Year February Electronic file ELV. Regulation (SoC) 1 / Year - Sending data support Over target or Not send Over due date 1 Month 2 Months continue 3 Months continue Over 3 Months continue Deduct Score -5 Points -10 Points -15 Points - 20 points 4.2 Support in TSPK activity - Co-operation in countermeasure problem and support sorting & Repair - Process and product audit : preparation of document and process , including concern person support - Co-operation for new model / ECN : PPAP submission - Process change information : If RPCA. Submit to TSPK less than 4 weeks before SOP. 4.3 Containment action - Quality alert reply within 24 hours and 1st lot information *** If Supplier any feed back over due date deduct score 5 points / Case*** 19 1. Supplier Quality Evaluation Manual S5 : Field Claim *** Supplier must be accept claim only *** S5 Case of field claim at our customer - Customer Disruption - Customer Field return - Customer Notification Case of field claim Domestic parts CKD Parts Deduct Score -5 Point -35 Point 10

2. Quality performance Y2021 2. Quality performance Y2021 2.1 Supplier quality score evaluation result Y2021 Overview of TSPK-G Target > 99 points 100 99.62 99.64 99.46 99.91 99.93 120 99.31 100 98.93 99.02 99.16 99.26 98.73 98.73 98.74 80 95 60 40 20 90 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC AVG. 11

2. Quality performance Y2021 2.2 Top 10 supplier P1 P4 2. Quality performance Y2021 2.3 Supplier trend BMW PTA SPA KLK 98.8 99.2 99.7 98.5 98.5 99.3 98.7 99.0 99.2 97.2 96.5 97.6 2019 2020 2021 2019 2020 2021 2019 2020 2021 2019 2020 2021 Up trend : Suppliers which have a better trend Down trend : Suppliers which downward trend and success to reach the target. “Keep going” over the past year. “Mind your trend” HUAMEI TYL UHM TSAT4 95.4 96.0 96.7 98.8 96.55 97.9 96.4 98.6 96.2 93.4 94.2 93.3 2021 2019 2020 2021 2019 2020 2021 2019 2020 2021 2019 2020 Side way : Suppliers which inadequate improvement continue 3 past year. “Let’s start now” 12

2. Quality performance Y2021 2.4 Lessons learned quality issue (Dimension) Detail Problem Details : BRKT ASS’Y ENGINE LH 1) Engine LH trim line out off spec. 2) Engine LH dimension out off spec. Effect for This Problems 1. Deduct Score 35 points & Problem recurrent 5 points 2. Lost cost for sorting and reworked 1,936,110 Baht (Still Sorting & Rework) No. Process Problem Root cause Improvement In-Charge Mission Description Jan’22 Feb’22 Mar’22 Apr’22 Status QC D Merit / Advantage 1. Press 1.On July 02nd'2019, K. Fernandez 1.At the Stamping process 1. Die F1+Pi UHM adjusted Mr. Pongphon  - No complain by 31/07/19 Pablo notified Engine LH trim line F1+ Pi stopper die damage distance the stopper & die F2 customer out off spec. was 14.00 mm, which &F2 pad cushion was loose process UHM developed insert it does not meet the specified. due to haven’t PM check die by welding and grinding 2.On November 19'2020 K. Pablo sheet. refer to CAD to solve the die Marafuschi notified Engine LH 2. Insert die upper/Lower 3/5 was loose. dimension out off spec. & 4/5 damage due to haven’t 2. Make PM check sheet and Mr. Pongphon  31/07/19 PM on plan. traing. 3. New insert die upper/Lower Mr. Sarawut 3/5 & 4/5 30/03/22 2. Quality performance Y2021 2.3 Lessons learned quality issue (Appearance) Detail Detail / Problem : BRKT LOWER ARM is crack. Effect for this problems 1. Deduct score 1 point. 2. Lost cost for sorting 12,696.91 Baht No. Process Problem Root cause Improvement In-Charge Mission Description July 21 Aug Sep 21 Oct 21 Status QC D Merit / Advantage 21 1. ASSY Full BRKT LOWER ARM is Component part thickness reduce - Adjust position die and lock Mr. Tanigpong  No complain by 15/10/21 weld. crack on 12/01/2021 Q'ty lower spec due to die insert die can pin to insert die. customer 15/10/21 1 U' shifting and daily check die not have - Revise daily check die add 15/10/21 point check. point check. - Addition point check thickness reduce on check sheet. 13

2. Quality performance Y2021 2.3 Lessons learned quality issue (Dislocation weld) Detail Detail / Problem : Saddle Spring 4x2 Weld dislocation of bead. Improve clamp for lock parts Effect for this problems 1. Deduct score 5 points. Problem Repeated 2 times 2. Lost cost for sorting 18,384.10 Baht No. Process Problem Root cause Improvement In-Charge Mission Description Jan 21 Feb 21 Mar 21 Apr 21 Status QC D Merit / Advantage 1. Welding Q-Gate Axle TSPK-L - Clamp lock Jig assembly loose due - Improvement clamp lock jig Mr. Tanigpong  - No complain by 7/01/21 Assembly. Found Problem Saddle to not have daily check jig and PM assembly. customer 7/01/21 spring 4x2 weld Plan. - Make daily check jig add point 7/01/21 dislocation of bead date check clamp before production. 7/01/21 12/11/20 Q’ty 10 U' - Make PM Plan - Add process 100% check appearance weld. 2. Quality performance Y2021 2.3 Lessons learned quality issue (Wrong assembly) Detail Detail / Problem : MEMBER ASSY-CROSS,FR Position nut NG. Effect for this problems Deduct score customer claim 5 Point No. Process Problem Root cause Improvement In-Charge Mission Description Mar21 Apr21 May21 Jun21 Status Mr. Wannipa QC D Merit / Advantage 1. Welding Customer Information -Locator pin control of assembly jig - Change Locator pin control of  -No complain by 29/03/21 Assembly. MEMBER ASSY-CROSS,FR is wear due to PM check sheet not assembly jig customer Position nut NG effect to have point check. - Revise PM check sheet add process assembly at point check diameter pin customer on 27/03/2021 control. 29/03/21 14

3. Quality activity Y2022 3. Quality activity Y2022 Top 5 suppliers  Countermeasure present 1st month : MGR 2 month cont. : GM 3 month cont. : MD / President “Q” up  Weekly follow up  Measuring system development  Process audit  Customer requirement : CQI, Safety part audit Critical part audit  Product audit Dimension Weld performance Appearance 15

4. Contact person 4. Contact person 4.1 TSPK-G Contact Plant Product group No. Name Position E-mail 1 Mr. Jaturaporn Pumsakuln MGR QC [email protected] [email protected] Axle group 2 Mr. Nattaporn Pomdee STAFF QC [email protected] [email protected] 3 Mr. Rangsan Chanya SUB FOREMAN QC [email protected] [email protected] 4 Mr. Prachuab Rodyim FOREMAN QC [email protected] [email protected] 5 Ms. Paradee Somsuk AMGR QC [email protected] [email protected] TSPK FORD Frame group 6 Mr. Sarawut Suya STAFF QC [email protected] [email protected] 7 Mr. Warit Phudtho LEADER PQC [email protected] [email protected] 8 Mr. Banluesak Somton LEADER PQC [email protected] [email protected] 9 Mr. Natthaphon Prathumthong AMGR QC [email protected] [email protected] ISUZU Frame group 10 Mr. Nanthapong Changhin STAFF QC 11 Mr. Manit Khamkula FOREMAN QC 12 Mr. Pratuan Khumnenr FOREMAN QC 1 Mr. Akekachai Inthajak MGR QC TSPK-BP All parts model 2 Mrs. Wannipa Dachmala STAFF QC TSPK-L All parts model 3 Mr. Jakkaphol Lakchai SUB LEADER PQC 1 Mr. Narathip Pakkunnan MGR QC 2 Mr. Tanigpong Mayom STAFF QC 3 Mr. Santi Thongkorn CHIEF LEADER PQC 16

4. Contact person 4.2 Supplier Contact Please submit TSPK within 30 Mar 2022 Supplier Annual Conference 2022 We are Good Teamwork with Continuous Improvement Spirit 17