Lyriq Electric Drive Units
from £3,500 to £9,500
Rebuilt units from £3,500 · Common codes: PMSM-FR, PMSM-RR, INV-P0A78
Get quotes from trusted UK Cadillac Lyriq EV specialists. Compare electric motor and battery system prices - EN0 drive unit covered. Get specialist quotes for your Lyriq.
Lyriq Electric Drive Units
from £3,500 to £9,500
Rebuilt units from £3,500 · Common codes: PMSM-FR, PMSM-RR, INV-P0A78
Lyriq High Voltage Battery Packs
from £8,500 to £18,500
Rebuilt units from £8,500 · Common codes: NCMA-102, LG-PCH, BMS-ULT
Lyriq Power Inverter Modules
from £1,800 to £4,200
Rebuilt units from £1,800 · Common codes: INV-P0A78, IGBT-CTRL, PCM-ULT

Most replacements completed within 3-5 days.


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Not sure which variant your Cadillac Lyriq is- Enter your registration number above - we'll identify the exact sub-model, drive unit code and compatible replacement options instantly.

Every engine code fitted to the Cadillac Lyriq across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Extracted from detailed petrol and performance engine families across Cadillac Lyriq variants.

NCMA-102 - 102kWh Nickel Cobalt Manganese Aluminium Battery
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
Avg. rebuilt price
£8,500 - £18,500
Supply only
Technical specifications
Common failures
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Cadillac Lyriq engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.

The Cadillac Lyriq's Ultium electric powertrain is generally reliable, but drive unit inverter faults (P0A78), high-voltage battery connection issues, and reduced propulsion warnings dominate UK replacement enquiries. Every rebuilt drive unit or battery pack supplied through EngineMarket includes upgraded internal components designed to address the original...
Lyriq Reduced Propulsion Power Warning
Most affected vehicles
Cadillac Lyriq Luxury RWD, Luxury AWD, Sport AWD (2023-2026, PMSM-FR/RR drive units)
Failure mileage range
35,000-75,000 miles
Typical failure window
Root cause
Drive motor inverter module detects overcurrent or phase imbalance (DTC P0A78), triggering protective reduced power mode to prevent catastrophic motor damage.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Diagnostic & Software Reset - Clear fault codes and recalibrate inverter | £450 - £850 | £250 - £450 | OBD2 diagnostics, inverter software update, test drive verification | Temporary fix only if hardware is sound; fault often returns within weeks |
| Inverter Module Replacement - Replace faulty PIM without full drive unit swap | £3,200 - £5,800 | £1,800 - £3,500 | Remove drive unit, replace inverter module, recalibrate motor control system | Addresses root cause for P0A78 faults; 12-month warranty on rebuilt module |
| Full Replacement - Rebuilt Drive Unit - Supply & fit complete remanufactured unit | £6,500 - £11,200 | £4,200 - £7,800 | Remove failed drive unit, install rebuilt PMSM unit with upgraded inverter, full calibration | Most reliable long-term solution; upgraded components address known failure points |
Our recommendation
If your Lyriq shows reduced propulsion warnings with DTC P0A78, get a specialist diagnostic first. For early-mileage faults under warranty, pursue Cadillac claim. For out-of-warranty units above 50k miles, a rebuilt drive unit with upgraded inverter offers better long-term value than repeated module swaps.
Compare rebuilt PMSM drive unit prices for your Cadillac Lyriq
Every electric drive unit and battery system type for the Cadillac Lyriq is available through our UK network with typical price ranges based on variant, motor code and budget.
Compare Cadillac Lyriq engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Cadillac Lyriq within hours.

Every electric drive unit and battery capacity fitted to the Cadillac Lyriq is listed below, with compatible motor codes, production years and common failure notes for accurate replacement identification.
The 340hp (255kW) single-motor configuration powers the launch-spec Lyriq Luxury RWD, featuring a rear-mounted AC permanent magnet synchronous motor delivering instant torque and 312-mile EPA range.
Engine Code(s)
PMSM-RR, INV-P0A78
Compatible Models (UK)
Luxury RWD (2023-2026), Debut Edition
Power output
Verified by registration
Common Failure Points
Inverter module DTC P0A78, phase current sensor faults, bearing wear above 60k miles
Production Years: 2023
Get quotes for Cadillac Lyriq 340hp electric engines
Choose your Cadillac Lyriq powertrain by configuration to compare realistic replacement prices, known issues, and compatible UK supply options - from the efficient 340hp RWD to the performance 528hp AWD.
All Cadillac Lyriq variants feature fully electric Ultium platform powertrains with AC permanent magnet synchronous motors, available in single-motor RWD or dual-motor AWD configurations.
Common Cadillac Lyriq Electric Drive Unit Families
Found In
Known For
Typical Electric Models
All Cadillac Lyriq variants feature fully electric Ultium platform powertrains with AC permanent magnet synchronous motors, available in single-motor RWD or dual-motor AWD configurations.
Common Cadillac Lyriq Electric Drive Unit Families
Found In
Known For
Typical Electric Models
Every Lyriq variant uses the 102kWh NCMA pouch-cell battery pack from LG Energy Solution, with wireless BMS management and 8-year/100,000-mile factory warranty coverage.
Found In
Important Notes
Not sure which fuel type your Cadillac Lyriq has- Enter your registration number above to instantly identify your engine code, drive configuration and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Cadillac Lyriq specialists.

This section covers all major powertrain changes across the Cadillac Lyriq's production timeline, organised so owners can quickly identify their drive unit configuration and compare rebuilt replacement prices from UK specialists.
⚙Key Changes
▣Main Engines
PMSM-RR- 340hp electric rear motor (Luxury RWD, Debut Edition)
NCMA-102- 102kWh high voltage battery pack (all variants)
INV-P0A78- Power inverter module (all drive units)
▰Popular Models
🔧Known For
Engine Codes Covered:
PMSM-RRNCMA-102INV-P0A78LG-PCHBMS-ULT