This AST Suspension 1988-04/1995 BMW 3 Lowering Springs – 40mm/40mm is a vehicle-specific lowering spring set selected by exact part number, chassis, drivetrain, body style, suspension configuration, and stated front and rear drop. Confirm every application note before ordering.

Key Features

• 40mm Even Drop: Front and rear lowering reduces roll and improves cornering stability without sacrificing daily drivability.
• Progressive Design: Variable rates provide smooth compliance over bumps and firm support during aggressive driving.
• Vehicle-Specific Engineering: Tailored for BMW 3 Series chassis ensuring precise fit and OEM-like alignment.
• High-tensile chrome-silicon steel with progressive rates starting soft for comfort and firming up for control.
• Compatible with OEM dampers and most aftermarket coilovers.
• Precision manufacturing for exact OEM integration.

Fitment

Specifications

What’s Included

One new AST Suspension product in the exact part number, dimensions, rate, adjustment specification, and quantity identified on this page. Springs, dampers, top mounts, reservoirs, adjusters, links, tools, lines, fittings, and hardware are included only when expressly stated for this exact configuration.

About AST Suspension

AST Suspension develops performance springs, dampers, coilovers, top mounts, and motorsport suspension components. Vehicle fitment, dimensions, rates, adjustment functions, and included components remain exact-part specific.

Related Parts

• Shop the complete AST Suspension collection
• Shop suspension components
• AST 1988-04/1995 BMW 3 Lowering Springs – 40mm/40mm
• AST 11/1990-05/1993 BMW 3/R Lowering Springs – 55mm/35mm
• AST 05/1986-05/1993 BMW 3/R Lowering Springs – 40mm/40mm

Frequently Asked Questions

How do I confirm these springs fit my vehicle?
Match the exact year, make, model, chassis, drivetrain, body style, engine, factory suspension, axle-load notes, and AST part number.

Will I need an alignment after installing lowering springs?
Yes. Measure ride height after the springs settle, then perform a complete alignment and verify tire, wheel, brake-line, and suspension clearance.

Can these springs be used with factory dampers?
Only when the exact AST application permits it. Check damper condition, available travel, bump-stop requirements, and every product-specific suspension note.

Is the advertised drop exact on every vehicle?
The stated drop is a target for the listed configuration. Actual ride height can vary with equipment, vehicle weight, spring isolators, damper condition, and prior suspension changes.

Installation Instructions

1. Confirm the exact AST part number, complete application or dimensional specification, included components, and current instructions before disassembly.
2. Support the vehicle at approved points and record the original ride height, alignment, suspension orientation, and adjustment settings.
3. Install components in the specified position and sequence using correct spring-compression, torque, preload, ride-height, and damper setup procedures.
4. Verify full suspension and steering travel, tire and wheel clearance, brake-line routing, fastener torque, and damper operation.
5. Settle the suspension, measure final ride height, complete a professional alignment, and recheck the installation after the initial driving cycles.

This AST Suspension 1988-04/1995 BMW 3 Lowering Springs – 40mm/40mm is a vehicle-specific lowering spring set selected by exact part number, chassis, drivetrain, body style, suspension configuration, and stated front and rear drop. Confirm every application note before ordering.

Key Features

• 40mm Drop: Front and rear lowering improves stance and cornering without sacrificing daily drivability.
• Progressive Spring Rate: Balances lowered ride height with responsive handling and smooth ride quality.
• Direct bolt-on replacement for factory springs no modifications required.
• High-tensile chrome-silicon steel coiled on Wafios machines for strength and corrosion resistance.
• Requires spring compressor tool for safe removal and install.
• Yes fits 1991-1992 BMW 318i base and 1991 318is base sedans and coupes perfectly as direct OEM replacement.

Fitment

Specifications

What’s Included

One new AST Suspension product in the exact part number, dimensions, rate, adjustment specification, and quantity identified on this page. Springs, dampers, top mounts, reservoirs, adjusters, links, tools, lines, fittings, and hardware are included only when expressly stated for this exact configuration.

About AST Suspension

AST Suspension develops performance springs, dampers, coilovers, top mounts, and motorsport suspension components. Vehicle fitment, dimensions, rates, adjustment functions, and included components remain exact-part specific.

Related Parts

• Shop the complete AST Suspension collection
• Shop suspension components
• AST 1988-04/1995 BMW 3 Lowering Springs – 40mm/40mm
• AST 05/1986-05/1993 BMW 3/R Lowering Springs – 55mm/35mm
• AST 11/1982-12/1990 BMW 44929 Lowering Springs – 40mm/40mm

Frequently Asked Questions

How do I confirm these springs fit my vehicle?
Match the exact year, make, model, chassis, drivetrain, body style, engine, factory suspension, axle-load notes, and AST part number.

Will I need an alignment after installing lowering springs?
Yes. Measure ride height after the springs settle, then perform a complete alignment and verify tire, wheel, brake-line, and suspension clearance.

Can these springs be used with factory dampers?
Only when the exact AST application permits it. Check damper condition, available travel, bump-stop requirements, and every product-specific suspension note.

Is the advertised drop exact on every vehicle?
The stated drop is a target for the listed configuration. Actual ride height can vary with equipment, vehicle weight, spring isolators, damper condition, and prior suspension changes.

Installation Instructions

1. Confirm the exact AST part number, complete application or dimensional specification, included components, and current instructions before disassembly.
2. Support the vehicle at approved points and record the original ride height, alignment, suspension orientation, and adjustment settings.
3. Install components in the specified position and sequence using correct spring-compression, torque, preload, ride-height, and damper setup procedures.
4. Verify full suspension and steering travel, tire and wheel clearance, brake-line routing, fastener torque, and damper operation.
5. Settle the suspension, measure final ride height, complete a professional alignment, and recheck the installation after the initial driving cycles.