Diesel Technic Group

What Diesel Technic Group does

Diesel Technic Group, operating through its legal entity Diesel Technic SE, is a German automotive aftermarket parts distributor founded in 1972 and headquartered in Kirchdorf, Lower Saxony. The company's core product is the DT Spare Parts brand, comprising approximately 50,000 SKUs covering commercial vehicles, vans, passenger cars, agricultural vehicles, construction equipment, ship/stationary engines, and industrial applications, supported by a 24-month product guarantee. Diesel Technic Quality System (DTQS) governs product development, initial sample inspection, series inspection, and aftersales quality, with certifications including ISO 9001 (since 1996), ISO 14001, BS OHSAS 18001, and ISO 27001 (since 2024). The product portfolio is complemented by a second brand, SIEGEL Automotive.

The company operates a B2B distribution-only model, selling exclusively through an authorised partner network that resells to workshops and fleet operators. Distribution is enabled by the Partner Portal — a proprietary eCommerce procurement platform with real-time stock checking, delivery history, aftersales forms, and advanced filter-by-technical-characteristic search (web and mobile app). Supporting infrastructure includes a fully automated small parts warehouse with shuttle technology and automated guided vehicles (AGVs) at the Kirchdorf headquarters, plus a regional logistics center in Avellino, Italy. The Parts Specialists brand and mobile app provide technical content and scan-based product identification for workshop professionals. Diesel Technic runs six wholly-owned regional subsidiaries in France, Spain, the UK, Italy, the UAE (Middle East & Africa hub), and Singapore (Asia Pacific), with operations reaching partners in over 150 countries.

Revenue is generated through hardware sales of DT Spare Parts and SIEGEL Automotive products to distribution partners, with pricing handled through Partner Portal accounts and not publicly disclosed. The company employs approximately 650 staff from more than 30 nationalities across 7 locations and remains privately held under founder family stewardship, with founder Horst Lieberwirth serving as Chairman of the Supervisory Board and a four-member Board of Management (led by CEO Dr.-Ing. Steffen Vondran) running day-to-day operations. No external funding rounds or institutional investors are disclosed, and revenue figures are not publicly reported.

Name

Diesel Technic Group

Legal name

Diesel Technic SE

Website

https://dieseltechnic.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Diesel Technic Group is a German automotive aftermarket parts distributor founded in 1972, supplying approximately 50,000 DT Spare Parts and SIEGEL Automotive components through an authorised distribution partner network serving workshops and fleet operators in over 150 countries from 7 global locations.

Ownership category

akta.pro rank

Product category

Automotive Aftermarket Parts

NAICS

Motor Vehicle Gasoline Engine and Engine Parts Manufacturing (33631)

SIC

Wholesale-Motor Vehicle Supplies & New Parts (5013)

akta.pro primary industry

Automotive Parts, Tires & Workshop Supplies Marketplaces (CRAFAHAD)

Keywords

• Automotive aftermarket parts
• Commercial vehicle spare parts
• Truck and bus parts
• Automotive parts distribution
• Workshop parts supply

Headquarters

HQ city

Kirchdorf

HQ country

Germany

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Automotive Parts and Accessories Sales: Diesel Technic develops and supplies brand spare parts (DT Spare Parts) to distribution partners worldwide. The company generates revenue through product sales to its network of distribution partners who then serve workshops and fleet operators. With around 50,000 products and operations in 150 countries, the company operates on a B2B model through authorized distribution partners.
2. SIEGEL Automotive Products: Additional product line under the SIEGEL Automotive brand offering automotive parts and accessories.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels10 records

Core offering

Diesel Technic develops and supplies approximately 50,000 branded automotive parts and accessories under its DT Spare Parts and SIEGEL Automotive brands for commercial vehicles, trucks, trailers, buses, vans, agricultural and construction equipment. The company distributes exclusively through authorized B2B distribution partners in over 150 countries, supported by an eCommerce Partner Portal, automated logistics with shuttle warehouse technology, and the Diesel Technic Quality System (DTQS) backed by a 24-month product guarantee.

Product overview

Diesel Technic Group is a German automotive parts supplier founded in 1972, operating as a multi-brand portfolio company with DT Spare Parts as its flagship brand offering approximately 50,000 automotive parts and accessories. The company distributes exclusively through authorized distribution partners in over 150 countries. Its product ecosystem centers on the DT Spare Parts brand supported by the Partner Portal (eCommerce procurement platform) and Parts Specialists (workshop professional support). Additional brands include SIEGEL Automotive. The portfolio is complemented by partner services including the Partner Program, Partner Services, Logistical Fulfillment, DT Commerce tools, the DTQS quality system, Product Catalogues, HelpDesk, and Premium Shop, creating an integrated offering that spans product supply, digital commerce, quality assurance, and customer support.

Differentiator

Problem solved

Functional benefit

Brands

• DT Spare Parts: Main product brand offering around 50,000 automotive parts and accessories with 24-month guarantee.
• Parts Specialists
• SIEGEL Automotive

Products and services

• DT Spare Parts

Quantifiable outcome

• 50,000+ products available through single partner
• +2 more outcomes

Named customers18 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature5 records

Partnerships

One partnership is on record.

• datenschutz nord GmbHminorOthersExternal data protection officer service provider. Provides data protection officer services for GDPR compliance and privacy matters.

Scale indicators7 records

Recent moves14 records

Expansion highlights6 records

Direct peers

• MEYLE: German-owned aftermarket parts manufacturer (Wulf Gaertner Autoparts AG) producing MEYLE and MEYLE-HD branded parts across chassis, steering, engine and drivetrain categories, with strong presence in commercial vehicle and passenger car aftermarket via distributor networks.
• TMD Friction: Global brake friction manufacturer behind the Textar, Mintex, Don, Cobreq, and Pagid aftermarket brands; competes with Diesel Technic's brake-related SKUs in commercial vehicle and passenger car segments through distributor networks.
• MANN+HUMMEL: Family-owned filtration specialist (Mann-Filter, Wix, Filtron) with deep commercial-vehicle presence and a global aftermarket distribution footprint; a direct comparable in terms of independent brand, multi-region distribution, and CV heritage.
• Rhiag Group: Italy-headquartered independent aftermarket parts distributor (acquired by D'Ieteren) with broad multi-brand spare parts operations across Southern and Central Europe; closely comparable to Diesel Technic as a multi-country B2B parts distributor.
• Inter Cars: Poland-headquartered, Warsaw-listed aftermarket parts distributor with 150,000+ SKUs sold through hundreds of branches and partner workshops across Central/Eastern Europe; the closest publicly traded parallel to Diesel Technic's B2B distribution-led model.
• Febi Bilstein: German aftermarket parts brand owned by Bilstein Group, offering a comparable multi-SKU portfolio of replacement parts (engine, brake, chassis, electrical) for commercial vehicles and passenger cars distributed through workshops globally - the closest head-to-head competitor to DT Spare Parts.

Broad incumbents

• Continental Automotive Aftermarket: Continental's aftermarket business (including ContiTech, VDO, and ATE brake brands) supplies belts, hoses, electronics, and brake components through distributors to workshops; overlaps strongly with Diesel Technic's product categories and distribution model.
• ZF Aftermarket: Major Tier-1 supplier (including former WABCO) with a dedicated commercial-vehicle aftermarket division offering transmissions, driveline, chassis and braking components; directly overlaps with Diesel Technic's commercial vehicle product portfolio.
• Robert Bosch Automotive Aftermarket: Global Tier-1 incumbent with a massive aftermarket division covering diagnostics, parts, and workshop services across commercial vehicles and passenger cars; competes with Diesel Technic on breadth, OE-grade quality, and workshop relationships.
• Mahle: Stuttgart-based Tier-1 supplier with a significant aftermarket division (engine components, filtration, thermal management) serving passenger car and commercial vehicle workshops globally; larger scale but similar independent-brand aftermarket positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/DieselTechnicGroup
• Facebookfacebook.com/dieseltechnicgroup
• LinkedInlinkedin.com/company/dieseltechnicgroup
• Instagraminstagram.com/dieseltechnicgroup

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Diesel Technic Group