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+--- Forum: Retrofitting (https://forums.spaycetech.com/forumdisplay.php?fid=13)
+--- Thread: Retrofit Polestar 2 B&W (/showthread.php?tid=1379)
Retrofit Polestar 2 B&W - Amazinjoey - 07-15-2026
Hey,
So I randomly bought a Polestar 2 because I got tired of filling the car and wanted something new to play with, and as someone who's not a fan of the HK audio in any Volvo.
Naturally, the immediate question is: Can we retrofit the B&W system into our older P2s?
I’ve spent more time than I should week digging into parts lists, wiring diagrams, and European forum threads to see if this is a realistic weekend DIY project, or if we're fighting a losing battle? Thing is I never lose
So here's how , Parts list:
Left-Hand Drive (LHD) Parts List:
Part Name OE Number Price (SEK)
Tweeter-on-Top (Center Dash, LHD) 32350709 ~4 090 kr
Base Speaker (Dashboard, LHD) 32350736 ~2 790 kr
Midrange Speaker (Center Dash, LHD) 32350707 ~2 790 kr
Tweeter (A-Pillar) 32350711 ~4 090 kr
Midrange Speaker (Front Door) 32350712 ~2 790 kr
Base Woofer (Rear Door) 31489043 ~1 015 kr
Tweeter (Rear Door) 32200034 ~1 015 kr
Surround Speaker (Rear Shelf) 31438338 ~2 537 kr
Subwoofer 32350738 ~5 930 kr
Right-Hand Drive (RHD) Parts List
Part Name OE Number Price (SEK)
Tweeter-on-Top (Center Dash, RHD) 32350710 ~4 090 kr
Base Speaker (Dashboard, RHD) 32350737 ~2 790 kr
Midrange Speaker (Center Dash, RHD) 32350708 ~2 790 kr
Tweeter (A-Pillar) 32350711 ~4 090 kr
Midrange Speaker (Front Door) 32350712 ~2 790 kr
Base Woofer (Rear Door) 31489043 ~1 015 kr
Tweeter (Rear Door) 32200034 ~1 015 kr
Surround Speaker (Rear Shelf) 31438338 ~2 537 kr
Subwoofer 32350738 ~5 930 kr
What Can We Cross-Source?
Many of the drivers in this setup are heavily shared with Volvo's larger SPA-platform vehicles (XC90, V90, V60, XC60), but there are some critical quirks and differences you need to know:
Tweeter-on-Top & Midrange and Base Speaker (Dashboard): These physical assemblies are connected to each other. This is a completely brand-new product design necessitated by the Polestar 2's unique, shallow dashboard geometry.
Midrange Door Speakers (32350712): These are physically identical to the 80mm B&W door midranges found in the XC90, V60, and XC60 (2021+ models). The only modification needed is the addition of some foam weather stripping to ensure a perfect seal against the P2's door cards.
A-Pillar Tweeters (32350711): Physically the same dome units used in the XC90. Crucial Note: These are 4-ohm drivers, whereas the older stock HK tweeters run at 12 ohms. If you run these on the stock HK amp, you risk burning out the channels or severely clipping the signal. You absolutely need the B&W amp to run these safely.
Rear Door Woofers (31489043) & Rear Shelf Surrounds (31438338): Good news here—these are completely identical to the stock HK parts already installed in older Polestar 2s. No need to swap them out.
Rear Door Tweeter (32200034): Identical to those found in the XC90, V90, and other modern SPA Volvos. Easy to find on the salvage market. Same as the A piller ones 4ohm and needs BW Amp
The Subwoofer (32350738): This is technically a new part number for the P2, but it uses the exact same 250mm (10-inch) "Fresh Air" structural design as the Volvo SPA subs.
The physical swap is relatively straightforward, but the brain of the system is where the real work lies:
The Amp: The hardware itself is shared with the V60/XC60 B&W system.
The Software Catch: It requires totally different AUD (Audio Module) firmware/software to map the channels, DSP, and EQ curves specifically to the Polestar 2 cabin.
I’m currently digging into how we can flash the correct calibrationonto a salvaged BW amp. If someone has more insights into this feel free to correct me. I have ZERO knowledge about AUD and the BW amps