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Obet, MD


There are things that the father and son team of Mario and Obet maintained since their 1st calibration shop opened its doors in 1967:

  1. personalized service,
  2. long-term relationships built on TRUST, and
  3. continuous upgrade of WORLD-CLASS service skills and equipment.

You deserve only the best care. The Obet who calibrated your Bosch/Diesel Kiki pumps 52 years ago is still the same Obet who you depend on today for your advance Bosch/ZEXEL pumps...

...and nothing will change that.


Malabon Diesel and Diesel King are managed by a family dedicated to providing 5-star diesel system maintenance and repair services to vehicle owners, fleet operators and diesel shops. They literally work 16/7 to give fast, personalized service.

Their relationships with customers and suppliers thrive on trust.


Roberto "Obet" Bernardo
President and General Manager, Malabon Diesel
President, Diesel King

Past President, Lions Club of Malabon



Gloria M. Bernardo
General Manager, Malabon Diesel
General Manager, Diesel King

Soroptimist International of Caloocan City
   Director and Past President
Soroptimist International of Philippines Region
   Chairwoman, Women’s Opportunity Awards Program
   Treasurer, Metro Manila North West District

Logo Slogan Vt-blue

3rd generation leader


Mario Enrico "Eric" Bernardo
Assistant Service Manager, Malabon Diesel
Service Manager, Diesel King

An Industrial Designer (BS Industrial Design, De La Salle-College of Saint Benilde) by degree. Zexel VP29/30/44 and Bosch Commonrail specialist by profession.

Member, Manila Jaycees



Certifications from Robert Bosch, Philippines.

  1. AE-1. Basic Electrical & Electronic. January 15-16, 2007.
  2. AE-2. Automotive Electrical. January 18-19, 2007.
  3. AE-3. Automotive Electrical.
  4. CDI. Common Rail Direct Injection. December 21-22, 2006.
  5. EM-1. Ignition System. August 22-23, 2006.
  6. EM-2. Gasoline Fuel Injection Electronic. August 22-23, 2006.
  7. EM-3. Gasoline Fuel Injection Electronic. October 10-11, 2006.
  8. EM-4. Electronic Control Unit Diagnosis. October 12-13, 2006.
  9. EP-1. Pump & Governors 1. Febuary 14-16, 2007.
  10. EP-2.1. Pump & Governors 2. Febuary 19-21, 2001.
  11. EP-2.2. Diesel Fuel Injection Governor. September 6-8, 2006.
  12. EP-3E. Distributor Fuel Injection Pump Electronic. August 17-18, 2006.
  13. EP-3F. Diesel Fuel Injection Pump Mechanical Flyweight. Aug. 15 – 16,2006.
  14. EP-4.1. Electronic Diesel Control Governors. October 4-6, 2006 and May 24-27, 2010.
  15. EP-4.2. Timing Sleeve Type In-line Pump. October 25-27, 2006.
  16. EP-5.1. Radial Piston Type Distributor Pump. December 7-8, 2006.
  17. EP-5.2. Common Rail Pump. November15-16, 2006.
  18. EP-5.3. Zexel VRZ Distributor Pump. January 27-29, 2009.
  19. EP-6.1. Diesel Fuel Injection – Vehicle. January 25- 26, 2007.
  20. EP-6.2. Common Rail System Diagnostics. January 25-26, 2007 and November 19-20, 2009.
  21. GEM. Gasoline Engine Management. December 19-20, 2006.

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Specialist knowledge/Factory-authorized service for: ZEXEL COVEC–equipped Nissan Serena, Homy, Terrano; Mitsubishi Pajero, Exceed; Isuzu Wizard, Bighorn; Hyundai Grand Starex; Kia Pregio, etc. BOSCH VE EDC–equipped Audi, BMW, Land Rover, Mercedes, VW Caravelle; ZEXEL VRZ–equipped Mitsubishi Pajero/CK (4M41), Shogun, Canter, Fighter. ZEXEL MD/ HD-TICS–equipped Isuzu Forward, Giga, Hino Ranger Pro Fuso Fighter, Super Great and Nissan Diesel trucks. BOSCH inline H Pump/RE-EDC–equipped Cummins, MAN, Mercedes, Volvo and Scania. Yanmar ZW and electronic. All ZEXEL–equipped Isuzu Crosswind, Fuego, Elf; Mitsubishi Adventure, Pajero, L300/L200/Strada, Canter; Nissan Frontier, Urvan Escapade, Patrol (SD33/TD42); Ford Everest/Ranger (WLT); Kia K27, Hyundai H100/Starex, etc.

DK logo-100x102Bosch/ZEXEL VP29/VP30/VP44–equipped Isuzu Dmax, Nissan Patrol/Urvan Estate, Cummins, MAN, Volvo trucks/buses; Bosch Commonrail (CRDI/CRI)–equipped Ford Everest, Focus, Ranger; Hyundai Accent, Getz, i30, SantaFe, Starex, Tucson; Kia Carens, Sorento, Sportage; BMW, Mercedes, Volvo, VW-Audi, Peugeot, etc; Bosch CRIN–equipped Fuso, MAN, Mercedes, Scania, Nissan Diesel trucks/buses; HEUI–equipped Isuzu Trooper, Caterpillar, Navistar, Powerstroke; Bosch test equipment–diesel test bench, vehicle diagnostics, battery tester/charger, and other workshop essentials.


Car and Bus airconditioner installation, maintenance and repair.


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