UK SIC 2007 · 33170
Repair and maintenance of other transport equipment n.e.c.
Repair and maintenance of other transport equipment n.e.c. is UK SIC code 33170, part of division 33 (Repair and installation of machinery and equipment) in the SIC 2007 classification. As of the July 2026 Companies House register, 3,794 active UK companies list 33170 among their SIC codes, and 3,464 list it as their first code.
As of the July 2026 Companies House register, 3,794 active UK companies list 33170 among their SIC codes (3,464 as their first code).
Companies House data refreshed daily. Page reviewed July 2026.
Division 33: Repair and installation of machinery and equipment
This division covers keeping industry's equipment running rather than making it. UK registrations spread across several sizeable codes: 33120 for machinery repair, 33140 for electrical equipment repair, 33190 for repair of other equipment, 33200 for installing industrial machinery, and transport-focused codes including 33160 for aircraft maintenance and 33170 for other transport equipment. The typical company is a mobile engineering firm or small specialist workshop, often founded by a time-served engineer, serving factories, sites and operators within a region.
Field service businesses run on scheduling, quoting and job management, which makes this division fertile ground for software firms selling those tools, particularly to companies showing growth in engineer headcount. Parts distributors, calibration houses, tool suppliers and vehicle leasing providers prospect it too, since almost every firm here runs vans. New incorporations tend to be engineers going self-employed with one anchor customer, needing insurance, invoicing tools and a website almost immediately, and the no-website flag is a reliable indicator of exactly that stage. Aviation maintenance firms under 33160 form a distinct, higher-regulation niche.
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About SIC 33170
How many UK companies use SIC code 33170?
3,794 active UK companies include 33170 (Repair and maintenance of other transport equipment n.e.c.) among their up-to-four registered SIC codes, of which 3,464 list it first. Figures are from the July 2026 Companies House register snapshot, counting active companies only.
What separates repair codes in division 33 from installation codes in division 43?
Division 33 covers industrial machinery and equipment: repairing production lines, installing factory plant, maintaining commercial equipment. Division 43 covers building services, such as electrical wiring, plumbing and HVAC within buildings. An engineer installing a packaging machine uses 33200; an electrician wiring the factory uses 43210. Firms doing both legitimately list codes from both divisions, within the four-code limit.
Which code should a maintenance engineer choose when several division 33 codes could apply?
Pick the one matching the equipment you most often work on: 33120 for mechanical machinery, 33140 for electrical equipment, 33190 where the mix defies categorising. Getting it exactly right matters less than you might fear, because the codes are self-declared, unchecked and freely amendable via the confirmation statement. Choose the closest fit now and refine it as the business settles into a specialism.
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