Your Gearboxes
in Expert Hands.
Repair of gearboxes, retarders, intarders, differentials, diagnostics, and supply of genuine OEM parts. ZF: Service and genuine parts Voith/Driventic: Service and genuine parts
* ZF (Bulgaria): service and genuine parts through ATS (ZF Service Partner). * Voith/Driventic (BG/RO/MD): service and genuine parts through TPT (Service Partner). * Iparts: repair, diagnostics, parts supply, and on-site technical support.
ZF Service Partner
OEM Spare Parts
Genuine ZF and Voith parts — gearboxes, steering systems, clutches, filters, retarders, and compressors. Direct supply from the factories in Germany.
Gearbox Repair
Complete overhaul of Voith DIWA and ZF Ecomat / EcoLife transmissions for city buses — performed according to the manufacturers’ specifications and catalogues by technicians trained at the Voith and ZF factories in Germany.
Diagnostics
ZF Testman and Voith DIWAgnosis, Diana, and Aldain — we identify the real problem, not just the symptom.
EV & HV Systems
Certified for Voith VEDS electric drives and high-voltage systems (HV Level 2S).
PDF Catalogues
Download technical catalogues and product documentation.
Your Industry. Our Expertise.
Whatever keeps your business moving — city buses, heavy-duty vehicles, cranes, or combine harvesters — we know transmissions from the inside and how to repair them quickly and reliably for the long term.
From Diagnosis to Delivery
We identify the exact fault using factory OEM diagnostic tools. No guesswork and no unnecessary replacements.
Diagnostics
We identify the exact fault using factory OEM diagnostic tools. No guesswork, no unnecessary parts replaced.
Repair & Service
Complete transmission overhauls and scheduled maintenance — every time according to the manufacturer’s procedures.
Technical Consultations
Not sure what you need? Our engineers quickly identify the correct part or the right repair approach.
Parts Supply
100% genuine ZF and Voith parts. ZF: Express and standard delivery directly from ZF factories in Friedrichshafen, Passau, and Schwäbisch Gmünd. Voith/Driventic: Spare parts delivered directly from Heidenheim, Germany.
Parts Logistics
We stock, track, and deliver — the right part is ready when your vehicle needs it, not a week later.
ZF Testman Diagnostics
We use ZF Testman — the same system used by certified ZF service workshops worldwide. For Voith, we use DIWAgnosis, DIANA, and ALADIN.
Backed by the Manufacturers
ZF The official ZF Service Partner status for Bulgaria is held by ATS. At the iParts service center, we perform diagnostics, repairs, and supply of genuine ZF parts according to factory procedures. Voith/Driventic The official Voith/Driventic Service Partner status for Bulgaria, Romania, and Moldova is held by TPT BG and TPT RO. iParts provides service and supply of genuine Voith/Driventic parts and complete units. Iparts is the operational service and trading center of the group of companies, managed by one team.
ZF Service
Authorized ZF Service Partner
Official ZF Service Partner — we repair ZF transmissions according to factory procedures, using the same tools and the same training provided to the global ZF network.
Voith / Driventic Service
Certified Voith Service Partner
Voith certification covers the full line of automatic transmissions and electric drives. Our technicians were trained directly at Voith’s headquarters in Heidenheim.
Take a look at what we do.
A behind-the-scenes look inside the workshop.
What clients say
What Our Clients Say
Don't just take our word for it. Hear from fleet operators and service managers who trust us with their vehicles.
Based on 2 reviews
"We have been working with iParts for 4 years on Voith DIWA gearbox repairs for our city buses. The quality of work is impeccable — after repair, the gearboxes perform like new. We saved significant costs compared to purchasing new units."
"Delivery of original ZF parts is always on time and at competitive prices. The team is extremely responsive — even with urgent orders, they manage to source the necessary parts within days. I recommend them to anyone working with commercial vehicles."