Your Gearboxes
in Expert Hands.
We repair gearboxes, run diagnostics, and supply OEM parts for fleets across Bulgaria. ZF and Voith authorized — trained directly at their factories in Germany.
The only authorized ZF and Voith service point in Bulgaria — real factory procedures, factory tools, factory parts.
ZF Service Partner
OEM Spare Parts
Original ZF and Voith parts — gearboxes, steering, clutches, drive shafts. Shipped direct from their factories in Germany.
Gearbox Repair
Voith DIWA NXT gearbox overhauls for city buses — done properly, by technicians trained at Voith in Germany.
Diagnostics
ZF Testman and Voith diagnostic software — we find 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 trucks, cranes, or harvesters — we know the gearboxes inside and how to fix them fast.
From Diagnosis to Delivery
From diagnosing the fault to sourcing the part and finishing the repair — here is what fleet managers and workshops come to us for, every day.
Diagnostics
We identify the exact fault using factory OEM diagnostic tools. No guesswork, no unnecessary parts replaced.
Repair & Service
Complete gearbox rebuilds and scheduled maintenance, following the manufacturer's procedures every time.
Technical Consultations
Not sure what you need? Our engineers have seen it all — they'll find the right part or repair approach quickly.
Parts Supply
100% genuine ZF and Voith parts, shipped directly from their factories in Germany — no substitutes.
Parts Logistics
We stock, track and deliver — so the right part is ready when your vehicle needs it, not a week later.
ZF Testman Diagnostics
We run ZF Testman — the same diagnostic system used in ZF's own certified workshops around the world.
Backed by the Manufacturers
We're not just resellers. We're officially authorized by ZF and Voith to service their products — and our technicians train directly at their factories in Germany.
ZF Service
Authorized ZF Service Partner
Official ZF Service Partner — we repair ZF gearboxes using factory procedures, the same tools ZF uses, and the same training their own global network gets.
Voith / Driventic Service
Certified Voith Service Partner
Voith certification covers the full automatic transmission line and electric drives. Our technicians trained directly at Voith's headquarters in Heidenheim.
See us at work
Repairs, training and a behind-the-scenes look at 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."