Tokico Blue (HP) vs Illumina struts for the Mazda Protege5
The 2002-2003 Mazda Protege5 (the "P5") is a common platform for owners who fit lowering springs and then need struts that can cope. Two Tokico options come up constantly in owner discussion: the blue-bodied Tokico HP, usually just called "Blues", and the adjustable Illumina. This page explains how they differ based on what vendors and owners say. Tokico's own technical documents for these old parts could not be located, so most of the detail below is owner or retailer description and is labelled as such.
In this guide
About Tokico
Tokico was a Japanese automotive parts maker founded in 1937 that was later absorbed into Hitachi; its automotive suspension business now sits within Hitachi Astemo.1 A Mazda-specialist retailer describes Tokico as an original-equipment supplier to Mazda and other Japanese manufacturers (a vendor claim).2 That is why the aftermarket Tokico lines are often seen as a natural fit for Japanese cars.
What are Blues and Illuminas?
| Tokico HP (Blue) | Tokico Illumina | |
|---|---|---|
| Adjustability | None; fixed valving | Five settings |
| What is adjusted | n/a | Compression and rebound together, per a retailer's description |
| Intended use | Firm street replacement | Street through autocross, according to the retailer |
The retailer description says the Illumina's external adjustment changes compression and rebound simultaneously across five settings, while the HP is a fixed-valve replacement meant to give a balanced, firm ride without being harsh.2 That page is for a different Mazda model, but it describes the two product lines rather than a specific car.
Where do the Blues sit on the Illumina scale? A Mazdas247 poster says the Blues' valving is "between the 1 and 2 settings" on the Illumina, relaying what Tokico reportedly told them, while other posters say the Blues feel as stiff as the stiffest Illumina setting.3 Those two statements contradict each other, which is a reason to treat any single number as unconfirmed. Owners agree on the practical point: the Blues are fixed, so if you want to change damping, you need Illuminas.
What do Protege5 owners say?
All of the following are owner opinions.
- Lowering springs. The original request that prompted this page came from a 2003 P5 owner running Eibach springs who wanted Blues or Illuminas; one reply advised waiting for Illuminas and said theirs had lasted over ten years on a lowered car.4 Another thread describes Eibach springs with Tokicos as a comfortable, improved-handling combination for daily driving.5
- Stock struts. In a thread comparing Tokico Blues with factory KYB, owners reported factory struts leaking and becoming bumpy after short mileage on lowering springs, and some Blue owners reported good results over long distances. One poster questioned whether the cost was justified and mentioned reduced travel from taller strut bodies without a settled answer.6
- Adjustability. Opinions split. Some say adjustable struts are mainly worth it for autocross and are a hassle otherwise, with advice that street-only cars do fine with the Blues. Others leave the front at a soft setting daily and raise it for autocross.73
- Access. Several posters describe the rear adjusters being awkward: reaching them involves trunk trim or access holes near the seatbelt mounts.35
- Durability. One poster said an Illumina strut had been replaced under warranty and called it frequent; another said Tokicos would not last on a lowered car.57 Anecdotes only; there is no statistical evidence here.
Practical guidance
- Choose Blues if you want a fixed, firm replacement and do not intend to tune.
- Choose Illuminas if you will adjust for events or want to experiment, and accept the access effort at the rear.
- Whichever you pick, buy all four as a set, because front and rear damping need to match, and fit new top mounts and boots while the struts are out where they are worn.
- Confirm the part number is listed for the Protege5 (not only the Protege sedan) for your model year with the seller or a parts catalogue before ordering, rather than assuming sedan struts fit.
- Used struts are a gamble. Check for oil weeping on the strut body, bent rods, and, for Illuminas, that the adjuster dial turns through all five positions with distinct clicks. Any used strut with unknown mileage is likely to have lost damping.
- Suspension work is safety-related. Spring compressors are dangerous, so have a qualified shop do the job if you are not experienced, and get an alignment afterwards.
Comparing old-stock and used Tokico listings
For an older Protege5, the practical choice may be driven as much by documented condition and application as by Blue versus Illumina. Request photographs of the actual part numbers on all four struts, the mounting brackets and the piston-rod area. Packaging from the right product family is useful, but it does not prove that the parts inside are the right application.
| Listing type | Questions worth asking |
|---|---|
| New old stock | How was it stored, are the parts unused, and what return or warranty terms apply? |
| Used complete set | What springs were used, how long was the set installed, and why was it removed? |
| Illumina with missing adjuster parts | Are the missing pieces available and does each adjustment mechanism work? |
| Mixed front/rear or replacement units | Do all part numbers and applications form the intended set? |
Ask for separate photographs of each Illumina adjuster. Do not treat a dial clicking through positions as a complete performance test of an old damper. A suspension specialist can help judge whether buying unknown used units is sensible compared with a documented replacement option.
Do I need adjustable struts for a daily-driven P5?
Consider how often you would actually change the settings and whether you can access the rear controls. If your aim is simply to replace tired suspension, the condition and correct application of the replacement may matter more than having a dial.
Can I choose struts independently of the springs?
Give the installer the spring brand, part number and the car's current setup. Ask for a matched recommendation instead of assuming every lowering spring suits either Tokico line.
Sources and further reading
- Tokico, Wikipedia: company history.
- Suspension, rx7.com store (retailer): vendor description of Tokico HP and Illumina lines.
- Illumina or HP, Mazdas247 forum: owner opinion.
- Tokico blues or Illumina for P5 wanted, Mazdas247 forum: a 2015 wanted-to-buy thread.
- Tein or Eibach/Tokico?, Mazdas247 forum: owner opinion.
- Are Tokico HP (blue) worth it over OEM KYB?, Mazdas247 forum: owner opinion.
- Tokico Illumina?, Mazdas247 forum: owner opinion.