The verdict in three sentences
For a London based automotive wiring harness supplier whose site takes 4 to 7 seconds to load, technical SEO comes first: no content campaign can make up for a slow, poorly indexed site. Once the foundation is sound, a content campaign of expert pages per application is what wins OEM and Tier 1 procurement teams searching for UK sources after Brexit. The 2026 market ballpark is 6,000 to 18,000 GBP for a technical project and 2,000 to 5,500 GBP per month for a content campaign.
Two options, two investment logics
Technical SEO is a one off investment: page speed, clean URL structure, duplicate removal, structured data, indexing of quality documents such as IATF 16949 certificates and PPAP capabilities. On its own it adds little traffic, but it multiplies the return of everything built on top.
A content campaign is recurring: expert pages per application (engine harnesses, cabin harnesses, EV high voltage, off highway vehicles, motorsport), per process (crimping, overmoulding, electrical testing) and per sector. These pages answer buyers comparing UK suppliers with Eastern European and North African plants. Since Brexit, many UK assemblers search for domestic sources to reduce customs friction, and they want proof of capacity and quality on the page.
| Criterion | Technical SEO | Content campaign |
|---|---|---|
| Cost (2026 market ballpark) | 6,000 to 18,000 GBP, one off | 2,000 to 5,500 GBP per month |
| Delivery time | 4 to 10 weeks | 6 to 12 months for full effect |
| Effect on load time | From 4 to 7 s down to under 2.5 s targeted | None |
| Effect on new queries captured | Low alone | Strong, page after page |
| Dependence on the provider | Low after delivery | High if the provider keeps the method |
| Room to grow | Foundation for every extension | New applications added each month |
Three year cost by scenario
Judge the decision over three years, a realistic sales cycle with an OEM programme. Figures are 2026 UK market ballparks.
| Scenario | Year 1 | Years 2 and 3 | 3 year total (ballpark) | Best for |
|---|---|---|---|---|
| A. Technical only | 6,000 to 18,000 GBP | Maintenance 4,000 to 10,000 GBP a year | 14,000 to 38,000 GBP | Content rich but slow site |
| B. Content only | 24,000 to 66,000 GBP | 24,000 to 66,000 GBP a year | 72,000 to 198,000 GBP | Recent, fast site with few pages |
| C. Technical then content | 30,000 to 84,000 GBP | 15,000 to 40,000 GBP a year (lower pace) | 60,000 to 164,000 GBP | Most harness suppliers |
| D. Content on a slow site | 24,000 to 66,000 GBP | Capped results | Poor return | Avoid |
We recommend scenario C for most suppliers: three months of technical work, then expert pages that slow down once key applications are covered. Scenario B only makes sense if the site is under two years old and already loads in under 3 seconds.
Recommendation by profile
If most of your business comes through trade shows and supplier portals, technical SEO protects credibility when buyers visit after a first contact. If you want new accounts, especially in EV and off highway, the content campaign is essential, written by someone who understands crimping and quality systems and checked by your engineering team.
To run execution through a single nearshore partner, Kolonell's Traffic Engine starts with a visibility audit at 100,000 FCFA (about 152 EUR), then 12 month plans at 125,000, 225,000 or 350,000 FCFA per month (about 191, 343 or 534 EUR), plus a 300,000 FCFA setup (about 457 EUR). These are Kolonell's prices, to compare with UK quotes in GBP.
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Illustrative example: Priya, marketing manager of a harness supplier in west London, chooses scenario C: 12,000 GBP of technical SEO, then 3,500 GBP a month of content for 9 months, 43,500 GBP in year one. A harness programme for a UK specialist vehicle maker is worth about 900,000 GBP a year at a 10 % margin, so 90,000 GBP. One programme won through an inbound enquiry covers roughly 2 times the year one spend, even if signature comes 12 months after the first contact.
FAQ
Where should we start if the site loads in 6 seconds?
With technical SEO, budgeted at 6,000 to 18,000 GBP as a 2026 ballpark. Aim for mobile load under 2.5 seconds before producing content.
How many expert pages per month?
For an automotive supplier, 4 to 8 pages a month is enough in year one. Prioritise applications with the highest margin.
Do quality certificates belong on the website?
Yes, buyers check them early. Publish a summary page per certification with downloadable documents, which also captures 10 to 30 precise searches a month.
How do we measure return with an 18 month sales cycle?
Track qualified enquiries and quality pack downloads every week. Link them to your CRM to attribute contracts signed 6 to 18 months later.
What is the lock in risk?
Low for technical work, higher for content. Require ownership of all pages and a method document handed over at contract end.
Get found by the buyers already searching for you. Start with a 100,000 FCFA visibility audit (about 152 EUR), credited against setup if you launch within 30 days, then a Traffic Engine plan sized for OEM buyers, with a weekly report on rankings and enquiries. Traffic Engine. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
