TOKYO (Reuters) -Nissan and Renault on Wednesday finalised the terms of their revamped alliance, with the Japanese automaker committing to invest up to 600 million euros ($663 million) in its partner's electric vehicle unit Ampere.

The agreement to finalise the terms of their overhauled partnership will put the two automakers on more equal footing and caps months of sometimes tense negotiations over issues such as the sharing of future intellectual property.

The investment in Ampere is consistent with Nissan being a strategic investor and securing a board seat on the new company, Nissan said.

The companies said the overhaul was subject to regulatory approvals and completion was expected in the fourth quarter of 2023.

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(Reporting by Daniel Leussink; Editing by David Dolan)