The Zestek steering wheel adapter on my Mk4 Supra has suffered another downshift paddle failure.
This is now the third failure in 15 months on a £1,400 + VAT product. The car was also away for engine work for around three of those months, so the real-world usage period is even lower than the calendar period suggests.
The issue is simple: the downshift paddle has stopped working again. The larger issue is that the product is now discontinued, and although the adapter is apparently still within warranty, there does not appear to be a replacement hub or a proper repair path available.
UPDATED: 03/07/26: Following publication, Tegiwa offered to accept return of the product. I have also removed direct quotation from private correspondence and paraphrased the supplier’s position instead. The supplier position, as communicated, is that the switch should not be moving, that this may be a design oversight, and that the repair approach given to SRD was to secure it with hot glue. My concern remains that the downshift paddle has repeatedly failed and that the proposed fix appears to be an adhesive workaround rather than a formal manufacturer-supported repair or replacement route.
That leaves the warranty position in a very poor place. A warranty is only useful if there is a practical remedy behind it.
Zestek Downshift Paddle Failure Timeline:
- March 2025: The Zestek steering wheel adapter was purchased as part of the first build.
- May 2025: The downshift paddle failed during the trip to JapFest at Silverstone.
- May 2025: SRD contacted Tegiwa. I was asked to take the car to Tegiwa’s premises in Stoke, where the fault was repaired onsite.
- January 2026: The car was away at SRD for the 3.4 build when the Zestek failed again. Tegiwa advised SRD how to repair it, and it was fixed again.
- June 2026: The downshift paddle failed for a third time. I contacted both Tegiwa and Zestek. Tegiwa said they would speak to Zestek, but after 10 days I had not received a meaningful update. I then posted about the issue on Instagram, after which Tegiwa got back in touch. I still had no direct response from Zestek, despite them having seen the stories.
What Has Failed?
The downshift paddle is no longer working.
That matters because this is not a cosmetic issue or a minor inconvenience. On a paddle-shifted car, the steering wheel controls are part of the core driving interface. A failed downshift paddle affects and detracts from how the car is driven and undermines confidence in the product.
This is also not a one-off failure. The same function has now failed three times in 15 months.
Warranty and Support Position
The adapter is apparently still within warranty. However, Tegiwa have stated that the hub has been discontinued and that they cannot supply anything to fix it or replace it.
That is the core problem.
If a product is discontinued while still inside its warranty period, there still needs to be a credible remedy. That could be a replacement part, a repair, a replacement unit, a credit towards the successor product, or a refund route. At the moment, the position appears to be: there is a warranty, but no available fix or replacement.
That is not good enough for a £1,400 + VAT steering wheel adapter.
The Suggested Fix
Tegiwa asked whether I had attempted to repair it myself. I had not, because I did not want to take the unit apart and risk affecting the warranty position.
They then sent instructions on how to attempt a fix and asked me to let them know how I got on, including whether the switch was the issue.
Tegiwa sent me instructions (above) to fix. They were the instructions.
That is not a proper warranty remedy. It is a self-diagnosis route on a product that has already failed multiple times. If it is the switch, the product has still failed again. If it is not the switch, the problem is worse, because there is apparently no replacement hub or supported repair route available.
Either way, the customer is left with the risk.
Why This Is a Problem
This is not a cheap generic steering wheel accessory. It is a premium adapter costing £1,400 + VAT.
For that money, I would expect durability, support, and a proper warranty route. Instead, I have had:
- three failures in 15 months;
- a repeat failure of the same core control;
- a discontinued product;
- no replacement hub available;
- no direct support from Zestek;
- no clear warranty remedy.
The issue is not just that the paddle has failed. Mechanical and electrical parts can fail. The issue is that it has failed repeatedly, and the support position appears to collapse once the product is discontinued.
Would I Buy Another Zestek Adapter?
Based on my experience, no.
I would not buy another Zestek steering wheel adapter unless the supplier confirmed the following in writing before purchase:
- spare parts are available;
- paddle switches are serviceable;
- the warranty remedy is clear;
- discontinued-product support is defined;
- replacement or repair routes are available during the warranty period.
Without that, the buyer is carrying too much risk.
Alternatives Worth Investigating
For GTR owners who were considering Zestek, KMP produce an R35 GT-R wheel that other people appear to use. https://www.kmpdrivetrain.com/product/nissan-gt-r-r35-my2017/
For Supra owners or CAN-based builds, KMP also produce a universal CAN Bus wheel that may be worth investigating. https://www.kmpdrivetrain.com/product/universal-can-bus-wheel-clubsport/
I have not tested those alternatives myself, so this is not a recommendation. It is simply where I would start looking if I were replacing the Zestek setup.
Final View
Three failures in 15 months on a £1,400 + VAT steering wheel adapter is not acceptable.
The product being discontinued makes the situation worse, not better. If a product is still under warranty, there needs to be a practical remedy. A warranty without available parts, replacement stock, or a clear repair route is of limited value.
Buyer beware.
