Company lists · Data refreshed September 2026

Top 25 Automotive wiring harness manufacturers based in the United Kingdom

Name: Automotive wiring harness manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 105 companies tracked

RevenueBase identified 105 automotive wiring harness manufacturers headquartered in the United Kingdom as of September 2026 and tracks 2,650 professional contacts across them, including 942 with verified work emails. Swindon is the largest hub.

This list covers automotive wiring harness manufacturers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

105Companies

2,650Contacts tracked

942Verified emails

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The 25 largest automotive wiring harness manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 105 automotive wiring harness manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to automotive wiring harness manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sews-E	Strong evidence	Newcastle-under-lyme, United KingdomHQ checked Sep 16, 2026	10001+	1,739 contacts →
	Strong evidence “SEWS-E, Sumitomo Electric Wiring Systems (Europe) manufactures and processes wiring harnesses and related parts in countries such as Hungary, Romania, Morocco and Egypt.” Source: RevenueBase Database · checked Sep 16, 2026
2	ASL	Strong evidence	Bolton, United KingdomHQ checked Sep 16, 2026	51-200	126 contacts →
	Strong evidence “Assembly Solutions Ltd (for short, ASL) is a subcontract manufacturer of cable assemblies, wiring harnesses and control panels which supplies manufacturers including Ford, Siemens…” Source: RevenueBase Database · checked Sep 16, 2026
3	Cornelius Electronics LTD	Partial evidence	Port Talbot, United KingdomHQ checked Sep 16, 2026	201-500	44 contacts →
	Partial evidence “Cornelius Electronics is an AS9100 sub-contract manufacturer supporting OEMs, machine builders and business owners worldwide who have a demand for a reliable, long term…” Source: RevenueBase Database · checked Sep 16, 2026
4	Ionix Systems	Strong evidence	Risley, United KingdomHQ checked Sep 16, 2026	501-1,000	35 contacts →
	Strong evidence “Ionix Systems is a specialist designer and manufacturer of wiring harness and woven systems, providing interconnection solutions for aerospace, defence, power generation and other…” Source: RevenueBase Database · checked Sep 16, 2026
5	Q5d	Strong evidence	Portishead, United KingdomHQ checked Sep 16, 2026	11-50	33 contacts →
	Strong evidence “Q5D is an innovative technology company developing tools to automate the production of wiring harnesses for the consumer white goods and electronics, through to the automotive and…” Source: RevenueBase Database · checked Sep 16, 2026
6	Excel Assemblies LTD	Strong evidence	Fife, United KingdomHQ checked Sep 16, 2026	501-1,000	32 contacts →
	Strong evidence “Excel Assemblies is a supplier of Cable Harnesses, Sub Assemblies and Technical Services to the Agricultural, Automotive, Construction, Mass Transit and Material Handling market…” Source: RevenueBase Database · checked Sep 16, 2026
7	Contour Electronics LTD	Partial evidence	Hook, United KingdomHQ checked Sep 16, 2026	11-50	29 contacts →
	Partial evidence “Bespoke Interconnect & Value Added Integration Solutions Contour Electronics specialises in designing and manufacturing custom cable assemblies, wiring looms and integrated…” Source: RevenueBase Database · checked Sep 16, 2026
8	Tekdata Interconnections Limited	Strong evidence	Etruria, United KingdomHQ checked Sep 16, 2026	51-200	29 contacts →
	Strong evidence “Tekdata Interconnections designs and manufactures complex and bespoke wiring harnesses for advanced or unique systems using exclusively developed technologies.” Source: RevenueBase Database · checked Sep 16, 2026
9	Renvale LTD	Strong evidence	Brome, United KingdomHQ checked Sep 16, 2026	11-50	28 contacts →
	Strong evidence “From its base in England, Renvale supplies ISO 9001 certified wiring harness systems to a world-wide customer portfolio of motorsport professionals, operating at the very highest…” Source: RevenueBase Database · checked Sep 16, 2026
10	Parkinson Harness Technology LTD	Strong evidence	Boston, United KingdomHQ checked Sep 16, 2026	51-200	26 contacts →
	Strong evidence “Parkinson Harness Technology manufacture bespoke electrical solutions including wiring harnesses, control panels, battery/power leads, PCB’s, and control systems.” Source: RevenueBase Database · checked Sep 16, 2026
11	Amphenol Trackwise Designs LTD	Indirect evidence	Stonehouse, United KingdomHQ checked Sep 16, 2026	51-200	22 contacts →
	Indirect evidence “Manufacturing the new generation of interconnect for customers around the world.” Source: RevenueBase Database · checked Sep 16, 2026
12	Horizon Wiring LTD	Strong evidence	Suffolk, United KingdomHQ checked Sep 16, 2026	11-50	21 contacts →
	Strong evidence “Specialist Wiring Harness Manufacturers” Source: RevenueBase Database · checked Sep 16, 2026
13	Kaliber LTD	Strong evidence	Swindon, United KingdomHQ checked Sep 16, 2026	51-200	21 contacts →
	Strong evidence “Kaliber Ltd design, manufacture and supply high integrity, customised cable harnesses and electro-mechanical assemblies to customers in the Aerospace, Motorsport, Marine, Mass…” Source: RevenueBase Database · checked Sep 16, 2026
14	HCI Systems Limited	Partial evidence	Newport, United KingdomHQ checked Sep 16, 2026	11-50	21 contacts →
	Partial evidence “HCI Systems Limited specialises in Designing and Manufacturing bespoke Electrical Systems for the Automotive, Autosport, Marine and Commercial market sectors.” Source: RevenueBase Database · checked Sep 16, 2026
15	Westwire Harnessing LTD	Partial evidence	Swindon, United KingdomHQ checked Sep 16, 2026	11-50	20 contacts →
	Partial evidence “Westwire Harnessing are specialists in design, development and manufacturing of wire harnessing for transport, aerospace and military.” Source: RevenueBase Database · checked Sep 16, 2026
16	Huber Suhner Phoenix Dynamics	Indirect evidence	Newcastle-under-lyme, United KingdomHQ checked Sep 16, 2026	11-50	20 contacts →
	Indirect evidence “With over 30 years’ experience, HUBER+SUHNER Phoenix Dynamics is a leader in delivering world class electrical cable assemblies into some of the most challenging environments.” Source: RevenueBase Database · checked Sep 16, 2026
17	Itel Electronics	Partial evidence	Swindon, United KingdomHQ checked Sep 16, 2026	11-50	19 contacts →
	Partial evidence “Established in 1991, Itel Electronics have 30 years experience manufacturing and designing high performance cable harness systems and electrical boxes for aerospace, space…” Source: RevenueBase Database · checked Sep 16, 2026
18	Brucom Distribution LTD	Partial evidence	Stafford, United KingdomHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “We are a UK-based electrical and mechanical manufacturer, combining innovation and sustainability to craft high-quality components and assemblies.” Source: RevenueBase Database · checked Sep 16, 2026
19	DC Electronics	Strong evidence	Maldon, United KingdomHQ checked Sep 16, 2026	11-50	18 contacts →
	Strong evidence “Established in 1997 DC Electronics has facilities both in the US and UK specialising in electric power steering and custom made wiring harnesses.” Source: RevenueBase Database · checked Sep 16, 2026
20	Link Cable Assemblies LTD	Partial evidence	Bellshill, United KingdomHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “Since 2002 Link Cable Assemblies have been supplying our clients with wire harnesses, looms, control panels, electrical components and cable assemblies from our manufacturing head…” Source: RevenueBase Database · checked Sep 16, 2026
21	WH Kemp Electrics LTD	Partial evidence	Westbury, United KingdomHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “Since 1967, many of the UK's leading manufacturers have made WH Kemp their ‘first choice’ supplier due to our consistent record of providing exceptional service, value, quality…” Source: RevenueBase Database · checked Sep 16, 2026
22	SIC LTD	Strong evidence	Swansea, United KingdomHQ checked Sep 16, 2026	51-200	17 contacts →
	Strong evidence “SIC (Swansea Industrial Components) has been making wiring harnesses and cable assemblies for over 50 years since it was founded in 1964.” Source: RevenueBase Database · checked Sep 16, 2026
23	Cablelynx LTD	Strong evidence	Northampton, United KingdomHQ checked Sep 16, 2026	51-200	14 contacts →
	Strong evidence “Cablelynx is a 1st choice supplier, manufacturer & sub-contractor of custom cable assemblies, harnesses, looms & panel builds in the UK.” Source: RevenueBase Database · checked Sep 16, 2026
24	Auto Electrical Supplies LTD	Partial evidence	Wakefield, United KingdomHQ checked Sep 16, 2026	11-50	10 contacts →
	Partial evidence “Founded in 1992, we specialise in the supply of Electrical Automotive Conduit, Hinged / Sealed Fittings and Automotive Electrical Connectors / Interfaces that protect critical…” Source: RevenueBase Database · checked Sep 16, 2026
25	Pinnacle Harnesses	Strong evidence	136 Rhosnesni Lane, United KingdomHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “Pinnacle Harnesses are a leading Wire Harnesses manufacturer that deliver bespoke and exact solutions to our valued customers.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: automotive wiring harness manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names automotive wiring harness manufacturers.
Partial evidence: Its own public description names part of automotive wiring harness manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name automotive wiring harness manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 105 automotive wiring harness manufacturers based in the United Kingdom

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Automotive wiring harness manufacturers based in the United Kingdom at a glance

As of Sep 16, 2026

35.5%Verified-email coverage

25.2Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Swindon

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 105 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among automotive wiring harness manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “automotive wiring harness manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names automotive wiring harness manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among automotive wiring harness manufacturers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 942 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names automotive wiring harness manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many automotive wiring harness manufacturers are there based in the United Kingdom?

RevenueBase identified 105 automotive wiring harness manufacturers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Sews-E, headquartered in Newcastle-Under-Lyme, tops this list with the largest team on record.

Which city has the most automotive wiring harness manufacturers?

Swindon leads with 5 headquartered companies, followed by Boston (3) and London (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 942 verified decision-maker contacts tracked across these 105 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.