Price: $2,500 OBO
This is a JUBU Performance ECU for the Lotus Emira V6, purchased in June 2024 and configured for a 440 hp upgrade, 91 octane fuel, 7,000 RPM rev limit, and 3rd catalytic converter delete. The unit is in good physical condition with no visible damage. It was removed from my vehicle following an engine failure and has not been used since. JUBU is an Austrian company specializing in performance parts for Lotus vehicles, and this ECU is based on Syvecs technology. It was shipped to me in July 2024 and installed in August 2024.
Important Disclaimer:
This ECU is sold AS-IS, with NO WARRANTY, NO RETURNS, and NO REFUNDS. By purchasing, you acknowledge that you have read and understand the full details of my experience below, including all documented issues and the potential risks associated with aftermarket tuning. Installation and use of this ECU may void your vehicle's factory warranty, bypass stock safety features, and lead to performance inconsistencies or mechanical failures. I strongly recommend professional installation and tuning by a qualified technician familiar with Lotus Emira and Syvecs systems. Buyer assumes all responsibility for compatibility, performance, and any resulting damage to their vehicle. I am providing this full disclosure to ensure transparency and avoid any disputes. Please conduct your own research and contact JUBU directly (
info@jubu-performance.com) for any firmware updates or support before making a purchase.
My Experience (Factual Summary Based on Documented Communications):
I installed this ECU in my US-spec Lotus Emira in August 2024 and used it for approximately eight months (until May 2025), alternating with the stock ECU for comparison. During this time, it functioned as intended only a handful of times (about 5 out of 50-100 drives). All issues below were absent with the stock ECU and these issues were reported to JUBU via email and WhatsApp, leading to five remote tuning sessions (September 2024, December 2024, April 2025) and one in-person tuning visit (October 2024). Despite these efforts, problems persisted. Here's a chronological summary of the key issues I encountered:
- August/September 2024 (Initial Installation and First Tuning):
- Power cut/interruption when shifting from 1st to 2nd gear after hitting the rev limiter (reported 8/29/24).
- Audible beeping noise from speakers at >70% throttle (intermittent; reported 8/29/24, resolved temporarily after tuning).
- Frequent stalling in Touring mode when coming to a stop (revs dropping too low; reported 8/29/24 and 9/4/24).
- Inconsistent air conditioning (worked briefly then failed to cool; reported 8/29/24).
- Throttle mapping delay in Touring mode at low revs or from standstill (reported 8/29/24).
- Power felt flat around 4,000-4,500 RPM (reported 9/4/24).
- Stalling while idling (reported 9/4/24).
- Drop in torque/power between 3,500-4,000 RPM after tuning (reported 9/13/24).
- October 2024 (In-Person Tuning in California):
- JUBU team visited for on-site adjustments. Temporary fixes were applied, but issues like stalling and power loss recurred shortly after. JUBU programmed a launch control mode for my car, which they suggested I test immediately after the on-site adjustment visit in October 2024, with a JUBU representative present in the passenger seat. During this test, the engine bay and cabin filled with thick black smoke. JUBU attributed this incident to a factory clutch issue rather than a problem with the JUBU ECU.
- November/December 2024 (Subsequent Tuning):
- Beeping returned during full throttle (reported 11/20/24).
- Power drop/loss between 6,000-7,000 RPM (timing/knock issue; reported 11/20/24 and 12/1/24).
- Limp mode after revving to redline (revs limited to 4,500 RPM, check engine light on; reported 12/1/24).
- Power loss above 6,000 RPM persisted after tuning (reported 12/4/24, temporarily fixed but returned on second drive).
- April 2025 (Final Tuning Sessions):
- Periodic stalling in Touring/Sport modes when stopping or engaging clutch (reported 4/3/25 and 4/24/25).
- Timing issue/power loss between 6,000-7,000 RPM (reported 4/3/25).
- Low RPM instability (revs dropping to ~500 RPM when stopping, sometimes recovering; reported 4/24/25).
- Limp mode during drive (revs limited to 4,500 RPM, stalled afterward; reported 4/21/25).
- Uneven idling and rough starts (ongoing).
- Pops and bangs reduced, but idle issues in Touring mode remained (reported 4/24/25).
- May 2025 (Engine Failure):
- After ongoing knock and timing issues (persistent between 6,000-7,000 RPM), the engine failed catastrophically. Lotus technicians found metal shavings in the oil, indicating severe internal damage. A full engine replacement, supercharger, and clutch components were required (clutch showed hot spots and damage).
JUBU suggested firmware updates for non-EU cars to address CAN bus bugs (e.g., auto-hold, park brake), but these did not resolve my core performance issues. They also denied the ECU could cause engine or clutch failures, attributing them to Lotus defects or user error (e.g., oil issues, track use), none of which applied to my vehicle (regular oil changes with recommended grade, no track use).
Contact: PM me, Serious inquiries only, happy to answer questions based on my experience.
