ECU / engine control module

Pop the lid. A gold-plated edge-connector strip or gold-lidded ceramic ICs means send it to a refiner; a plain green board with black plastic ICs and tinned pins means sell it whole as a core. Age is the proxy — 1990s boards carry real gold, 2018-plus almost none.

Au 0.11 g/lb of bare boardAg 0.45 g/lbPd 0.05 g/lbCu ~20% of board mass

eBay typical$3–8per lb

Refiner pays$3per lb

Metal in it$6.59per lb at 4 Aug 2026 spot

Confidencemedof the yield figures

How to spot it

Cast aluminium or stamped-steel box roughly 5×7×1.5 up to 8×10×2 inches, with one to three 40–150-pin connectors on one edge and an OEM label. Bosch 0 261…, Denso 89661-…, Delphi/GM 12…, Siemens/Continental SIM…. Found on the firewall or cowl, in the passenger footwell, inside the airbox area, on the inner fender, or bolted to the intake manifold.

Metal content

Metal	Quantity	Notes
Gold	0.11 g/lb of bare board	≈0.037 g per typical 150 g board
Silver	0.45 g/lb
Palladium	0.05 g/lb
Copper	~20% of board mass

At 4 Aug 2026 spot prices that works out to $6.59 per pound of contained metal — Gold 0.04 g = $5.22, Palladium 0.018 g = $0.74, Copper 30 g = $0.32, Silver 0.16 g = $0.30. A refiner paying $3 returns about 46% of that, which is normal: refining costs money and the buyer takes a margin.

Safe removal

Working temperature: Cold

Battery negative off first — hot-unplugging an ECU can destroy it and kill the resale. 8/10 mm sockets, Torx T20–T30, trim tools for kick panels. Release the connector levers; never pull on the loom. Keep the immobiliser, key and BCM together — a matched set is worth far more than the parts.

Hazards

☠ Lead — dust more than fume

NEVER dry sweep or use compressed air on a scrapping bench. HEPA-vac or wet-wipe only.

💨 Fumes, ventilation and open flame

NEVER burn boards, wire insulation or plastic. Ever.

☣ Beryllium copper

NEVER put BeCu in a grinder, a sandblaster, or a melt.

Before you scrap it

This is a core item. $40–350 working or as a rebuildable core against about $2 as scrap — 20–150×. Diesel ECMs (Cummins, Duramax, PowerStroke) run $200–900. Even a dead ECU is often $20–60 as a core.

The common trap

"ECUs are full of gold" — there's about $5 of gold in a box that sells for $150 working. The opposite mistake is just as common: people shred ECUs for the aluminium housing, which is worth 60 cents. The assay behind these numbers is single-source and skews high; halve it for anything built after 2015.

Questions

How much gold is in ecu / engine control module?

Gold: 0.11 g/lb of bare board. Silver: 0.45 g/lb. Palladium: 0.05 g/lb. Copper: ~20% of board mass. At current spot that is about $6.59 of contained metal per pound.

How do you identify ecu / engine control module?

Pop the lid. A gold-plated edge-connector strip or gold-lidded ceramic ICs means send it to a refiner; a plain green board with black plastic ICs and tinned pins means sell it whole as a core. Age is the proxy — 1990s boards carry real gold, 2018-plus almost none.

How do you remove ecu / engine control module safely?

Battery negative off first — hot-unplugging an ECU can destroy it and kill the resale. 8/10 mm sockets, Torx T20–T30, trim tools for kick panels. Release the connector levers; never pull on the loom. Keep the immobiliser, key and BCM together — a matched set is worth far more than the parts.

Is ecu / engine control module worth more working than as scrap?

This is a core item. $40–350 working or as a rebuildable core against about $2 as scrap — 20–150×. Diesel ECMs (Cummins, Duramax, PowerStroke) run $200–900. Even a dead ECU is often $20–60 as a core.

Related in Automotive

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