do88 Auxiliary Radiator, BMW M2 M3 M4 G80 G82 G87 (S58)
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87). Confirm your exact car with us before ordering.
- Shipping at real carrier rates
- 30-day returns on unused parts
- Fitment help before you buy
The S58 has three radiators up front: one large center radiator and a smaller auxiliary radiator ahead of each front wheel. The factory auxiliary units use thin cores and plastic tanks, which struggle once the engine is tuned. do88's replacements use thicker cores and more frontal area to keep engine temperatures in check on the street, on track or at the drag strip.
What you get
- A pair of auxiliary radiators, one for each side. Upgrading both together is more effective than one.
- Larger core volume and frontal area than the factory units.
- Drop-in fit on either side, with CNC-machined mounting brackets.
- OE-style quick-connect inlet and outlet fittings.
- Accepts the factory rock guard for protection from road debris.
Brand: do88 · Part #: WC-440
BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87). Confirm your exact car with us before ordering.
| Model | Chassis | Years | Engine | Fits |
|---|---|---|---|---|
| M3 | G80/G81 | 2021+ | S58 (BMW M) | |
| M4 | G82/G83 | 2021+ | S58 (BMW M) | |
| M2 | G87 | 2023+ | S58 (BMW M) | |
| X3 M | F97 | 2020–2024 | S58 (BMW M) | |
| X4 M | F98 | 2020–2025 | S58 (BMW M) |
Not sure? Email sales@b58racing.com with your VIN.
- Ships from the brand or distributor, usually in 3–7 business days.
- Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
- Unused parts can be returned within 30 days. Some items are marked no-refund in their description.
Full details are on our shipping and returns page.
Guides for this part
S58 Common Problems (G80 M3, G82 M4, G87 M2, X3 M and X4 M) and the Parts That Fix Them
The S58 is still a young engine, and its public problem record is short. The most serious items we found are two BMW delivery stops on small groups of early engines: a 2019 X3 M and X4 M build window where BMW replaced t
BMW S58 Mods Guide: M2, M3, M4, X3 M and X4 M Upgrades in Order
On an S58, start with a tune and cooling. These cars make a lot of power stock, and heat is what holds them back on hot days and back-to-back pulls. Next come downpipes and a tune built for them, then fuel: an ethanol an
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