The BMW E30 is one of the most popular classic cars for EV conversion. Its 1,100 kg curb weight, rear-wheel-drive layout, and large engine bay make it an ideal donor. With a CMVTE conversion kit, you can retain the E30's balanced handling and crisp steering while eliminating the maintenance of an ageing M10, M20, or M42 engine.
Why the E30 is a Top Conversion Candidate
- Weight: Under 1,100 kg — lighter than most modern EVs, meaning smaller battery packs achieve useful range.
- Engine bay space: The M20 inline-six bay fits a CVx motor plus a 10-15 kWh battery module in the front position.
- Transmission compatibility: The original Getrag 240 or 260 gearbox bolts directly to a CMVTE adapter plate. Retain the five-speed manual for a familiar shift feel — the clutch engages the motor's neutral mode.
- Aftermarket support: The E30's enthusiast community means adapter plates, motor mounts, and battery trays are readily available through CMVTE's global network.
CMVTE Motor Options
| Motor | Power | Torque | Cooling | Best For |
| CVx 80 | 80 kW (107 hp) | 200 Nm | Air | 316/318i, city driving, budget builds |
| CVx 120 | 120 kW (161 hp) | 280 Nm | Liquid | 325i, daily driving with spirited use |
| CVx 160 | 160 kW (215 hp) | 380 Nm | Liquid | Track builds, M3 replica, high-performance |
The CVx 120 is the recommended choice for most E30 builds. It produces 280 Nm from 0 RPM — matching the M20B25's peak torque but available instantly — while drawing less than 200A at 312V, allowing a manageable battery pack size.
Battery Configuration
The E30's layout allows three battery locations:
- Engine bay: 10-15 kWh LFP pack in the space of the removed engine and radiator. Weight over the front axle improves traction.
- Transmission tunnel: 5-10 kWh using the space occupied by the exhaust and driveshaft. CMVTE offers a tunnel pack shaped to fit the E30's floorpan.
- Fuel tank area (under rear seat): 10-20 kWh — the ideal location for weight distribution. The fuel tank is removed and the pack mounts to the original mounting points.
A combined 30-40 kWh pack using all three locations provides 150-200 km of range while maintaining near-50:50 weight distribution. CMVTE's pack dimensions are designed specifically for the E30 chassis — no cutting or welding of the floorpan is required. All packs use prismatic LFP cells with active BMS and IP67-rated enclosures.
Driving Experience After Conversion
An E30 with a CVx 120 accelerates from 0-100 km/h in approximately 7 seconds — comparable to a 325i Sport Evo — with immediate torque from 0 RPM and smooth delivery. Regen braking can be set from 10% to 70%, enabling one-pedal driving in traffic. The weight distribution shifts from roughly 55:45 front-heavy to 50:50 by removing the iron-block engine and placing batteries in the rear, improving cornering balance. Range on a 30 kWh pack is approximately 150 km. Charging uses a standard Type 2 AC connector — full charge in 5-7 hours from a 7.4 kW wallbox.
Conversion Process
- Remove the engine, transmission, radiator, exhaust, and fuel system. The M20 and gearbox weigh roughly 180 kg — the CVx 120 replaces them at 45 kg.
- Bolt the CMVTE adapter plate to the Getrag bellhousing and mount the motor. Retain the clutch slave cylinder and shift linkage.
- Install battery packs in the chosen locations. CMVTE packs include integrated BMS and pre-wired HV connectors — no cutting or welding of the floorpan is required.
- Mount the controller in the former ECU location behind the glovebox. Route the wiring harness through the factory firewall grommets.
- Install a DC-DC converter for 12V systems and an electric vacuum pump for brake assist. The power steering can be replaced with CMVTE's EPS unit.
- Configure throttle mapping, regen braking, and CAN outputs. The controller outputs speed, SOC, and fault signals compatible with the E30's analogue gauges.
Cost Breakdown
| Build Level | Kit | Battery | Total Estimate |
| Budget (318i, city) | CVx 80 — $3,500 | 20 kWh — $3,000 | $7,500-$9,000 |
| Mid (325i, daily) | CVx 120 — $5,500 | 30 kWh — $4,500 | $11,000-$14,000 |
| Performance (track) | CVx 160 — $7,500 | 40 kWh — $6,000 | $15,000-$18,000 |
For comparison, commercially integrated E30 conversion packages sold by regional specialists start at $22,000 and often exceed $30,000. CMVTE's factory-direct pricing on the motor, controller, and battery reduces the hardware cost by 40-50%.
FAQ
Can I keep air conditioning? Yes — CMVTE supplies an electric A/C compressor that runs off the HV battery.
Does it affect value? A well-executed conversion can increase the value of a standard 316i or 318i to match a clean 325i Sport, depending on build quality.
CMVTE Advantage
CMVTE has supplied E30 conversion kits to customers in Germany, the UK, the US, Australia, and Japan — 130+ countries total. Every kit includes the motor, controller, adapter plate, wiring harness, and installation documentation. Dr. Kevin Wang's engineering team provides remote support during your build.
Tell us your E30 model and target range — we will recommend the right CVx motor, battery pack, and adapter configuration
