This tender invites bids from qualified vendors in Karachi for professional servicing and calibration of diesel injectors and fuel pumps used in the Sindh Integrated Emergency and Health Services ambulance fleet. The department requires expert maintenance to ensure optimal engine performance and fuel efficiency for 282 diesel ambulances operating 24/7 across Sindh. The scope includes removal, inspection, cleaning, testing, calibration, and replacement of worn parts for diesel injectors and fuel pumps using certified OEM-approved test benches. Services must meet OEM standards with genuine parts and include detailed test reports and a minimum six-month warranty. The contract is a closed framework for 12 months with a maximum turnaround of three working days per unit and emergency support within 24 hours. Bidders must be registered on the active tax payer lists of FBR and SRB, have at least five years of experience, and operate certified workshops with skilled technicians. Compliance with PEC categories and FBR/ATL registration is essential. The bid security is PKR 200,000 fixed, and performance security is 5% of contract value. Bids remain valid for 90 days. Submission deadline is on the 9th of March 2026 at 10:30 AM via the EPADS portal, with bid opening at 11:00 AM at the SIEHS office located at 43-15/K, Block 6, PECHS, Karachi. Bidders must submit a non-refundable tender fee of PKR 3,000 and a refundable bid security. Late or conditional bids will be rejected. Pro-Tip: Ensure your bid includes the original pay order for the tender fee and bid security before the deadline to avoid disqualification. Also, verify your FBR and SRB active taxpayer status to meet eligibility criteria and avoid common pitfalls in technical evaluation.