Buick · 2012–2016 (US)

Buick Regal eAssist battery replacement

Buick Regal eAssist battery diagnosis and replacement across the Phoenix metro. The Regal eAssist uses the same small 115V lithium pack as the LaCrosse eAssist, and stop-start trouble is the usual first symptom.

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Buick Regal eAssist hybrid battery at a glance

System: eAssist mild hybrid — assists the engine, never drives the car alone
Battery type: Lithium-ion
Same pack as: Buick LaCrosse eAssist
Repair route: Replaced as a complete assembly. Lithium packs are not rebuilt at module level
Installation: Included at our shop in the Phoenix metro; mobile install adds $250

Get a price for your Buick Regal eAssist

Pick what you need and how to reach you. You get a written quote before anything is ordered.

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New aftermarket battery3 years · $3,149 battery3 years$3,149

That is the battery, with free shipping nationwide. Want us to fit it in the Phoenix metro? Send this and we’ll call you with the price to install it. Pricing can change, and we confirm it before anything is ordered.

★ Recommended. Not sure which battery? Pick “not sure yet” — nothing is decided until you have a written quote.

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Symptoms Regal eAssist owners report

Auto stop-start becoming intermittent, then stopping entirely.
Rougher engine restarts at lights.
A dashboard battery or charging message that reads more serious than it is.
City fuel economy slipping a little, rather than dramatically.
A weak 12V battery producing all of the above — which is why it gets tested first.

Prices and fitment for the Buick Regal eAssist

Buick Regal eAssist Hybrid Battery (2012–2017) — from $3,149

Buick Regal eAssist hybrid battery questions

My stop-start has stopped working. Is it the eAssist battery?

It can be, and it's the most common way this pack announces itself. It can equally be the 12V battery, which is much cheaper — and which is why that gets tested first.

Is the Regal eAssist pack the same as the LaCrosse's?

Yes, the same eAssist pack. Part numbers are still confirmed against your VIN before anything is ordered.

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Not sure what your hybrid needs? We'll work it out with you.

We come to you, test the pack, the 12V and the cooling, and you get a written quote before anything is decided. No obligation.

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