BMW E46.
The coilover guide.
Shop the coiloversRepresentative modified BMW E46 image.
From a daily-driven 330i to a track-prepared M3, choose a kit that suits the car and understand what you are paying for.
The E46, from daily driver to track car.
For a road-driven E46, we'd put a controlled ride and usable suspension travel ahead of the lowest possible stance. On a track car, the tyres and alignment need to be part of the suspension decision from the start.
The kit has to suit the version you own. An M3 has dedicated applications, the 325xi and 330xi have their own listings, and some kits change the rear spring layout.
BMW launched the fourth-generation 3 Series in 1998. The E46 family continued through 2006, with saloon, coupe, Touring, convertible and Compact body styles. The M3 joined the range in 2000. It stayed in production until 2006, although the application dates on suspension kits can differ by body and market.
BMW records more than three million E46s sold. That broad model range is still reflected in the parts available: there are kits for an everyday 3 Series as well as systems with separate damping controls for a developed track car. The four brands we currently list for the E46 are BC Racing, Eibach, AST and MOTON.
You can keep a road car's character while improving its body control, or build the suspension around a more demanding tyre and track setup. Decide how far you want to take the car before spending the budget. The right choice for a weekend coupe may leave a dedicated track driver wanting more adjustment.
Model history: BMW Group: 50 years of the 3 SeriesBMW Group Classic: E46 model historyBMW M: the E46 M3.
Start with your E46.
Match the model year, engine and body style before comparing brands.
Rear-wheel-drive 3 Series
Start with the engine and body style. BC Racing separates its sedan/coupe and convertible applications, while Eibach also distinguishes the front axle-load rating. A shared E46 chassis code does not mean that every 316i, 330i and convertible uses the same part number.
See the kitsE46 M3
Use the M3 application from the outset. For example, BC Racing's BCR-I-14 is an M3 coupe listing; BCR-I-02 is the regular sedan/coupe application. AST has dedicated M3 kits too. Eibach's M3 reference is PSS65-20-001-03-22, with its own engine and axle-load table.
See the kits325xi and 330xi
The two AST xi listings here offer different rear layouts. ACU-B1102SD is the Street kit with a separate rear spring and damper; ACC-B1104SD is the Clubracing kit with front and rear coilovers. Both name the 325xi and 330xi. Choose between those specifications, then check the full application on the product page.
See the kitsCompact and other applications
Some AST and MOTON application tables include the 318ti and 325ti. Use an entry that actually names your engine and body style. If the table leaves your Compact unclear, send us its year and engine before choosing a kit.
See the kitsWhat do you want
from the car?
Think about where you drive and what you want to change about the car.
Two different rear suspension layouts.
The original E46 rear spring sits separately from the damper. Many coilover kits keep that layout and add an adjustable rear spring seat. You still get height adjustment, even though the spring is not wrapped around the rear damper.
A true rear coilover puts the spring around the damper. BC Racing lists BCR-I-31 for the regular E46 and BCR-I-64 for the M3 in this arrangement. Before ordering a conversion, have the installer confirm the mounting requirements: the spring load will act through the damper mounting points.
The spring figures show why the layout matters. Our BCR-I-02 listing gives a default 8 kg/mm rear spring, while the true-rear BCR-I-31 lists 5 kg/mm. That is not a direct comparison of stiffness at the wheel. The spring's position and suspension motion ratio change how its rate acts at the tyre. Use those figures with the exact kit layout, and agree any rate changes with the supplier.
See how height and preload work
Conceptual layout. Spring position affects how its rate acts at the wheel.
Budget for the whole suspension job.
Have the bushes, joints and mounts inspected before the new kit goes on. Play in an old component can remain after fitting new dampers, and it makes little sense to pay for alignment before fixing it. Ask the fitter to inspect the suspension mounting areas at the same time.
Give the fitter your wheel width, offset and tyre size, together with the ride height you have in mind. They need to check clearance as the steering and suspension move. A car that clears its wheels while parked may still rub when it turns or compresses over a bump.
Tyres and alignment
Set the final ride height before the alignment. If the car does road miles between track days, discuss that compromise with the fitter instead of copying a track-only setting, and keep a record of what you change.
Top mounts and bushes
Check whether the kit supplies new mounts or reuses the originals. Rubber and spherical mounts behave differently: a more direct connection can also pass more noise and vibration into the car. Replace worn parts and choose the mount type to suit the way you drive.
Anti-roll bars
Changing roll stiffness at one axle changes the balance of the car. Get the dampers, springs and tyres working together first, then choose a bar adjustment to address the behaviour you want to improve.
Brakes and track preparation
For repeated circuit sessions, allow for braking and cooling as well as suspension. Tell the fitter about other changes to the car, particularly anything that affects its weight or clearance.
The current E46 range.
Compare the controls and hardware included in each range.
BC Racing
BR is a sensible starting point to compare for a road or mixed-use E46. Check the selected series inside the product: the E46 listings can contain several configurations. The factory-style and true-rear kits also have different part numbers and spring specifications.
View BC Racing E46 kitsEibach
The Pro-Street S part numbers ending 01-22 and 02-22 have front axle-load limits of 910 kg and 1,030 kg respectively. The M3 reference ends 03-22. Match the application table as well as the load limit; choosing the higher number alone does not establish fitment.
View Eibach E46 kitsAST
The 5100 range spans Street, Street Performance and Clubracing specifications. The listed kits have 12-position rebound adjustment, but mounts and rear layouts differ. The 5200 and 5300 add separate damping circuits for a more involved setup.
View AST E46 kitsMOTON
The 1-Way Clubracer lists 15-position rebound adjustment. Two- and three-way kits add separate controls, and the range includes both separate-rear-spring and rear-coilover arrangements. Compare the full kit specification before choosing by the MOTON range name alone.
View MOTON E46 kitsFind your E46 coilovers.
Prices include UK VAT. Choose an application and brand, then open a kit for its current options and availability.
28 listings
Match the engine, body style and axle-load limits on the product page before ordering.
![BC Racing Coilovers - BMW 3 Series Sedan/Coupe (98-06) [E46]](/images/09cf8cd191b679-480.webp)
BC Racing · BCR-I-02
BC Racing Coilovers - BMW 3 Series Sedan/Coupe (98-06) [E46]
Rear-wheel-drive 3 Series
BC Racing · BCR-I-14
BC Racing Coilovers - BMW 3 Series Coupe (00-06) [E46 (M3)]
E46 M3
BC Racing · BCR-I-90
BC Racing Coilovers - BMW 3 Sedan Convertible (RWD) (98-06) [E46]
Rear-wheel-drive 3 Series
BC Racing · BCR-I-121
BC Racing Coilovers - BMW 3 Sedan Convertible (RWD) (00-06) [E46 (M3)]
E46 M3
BC Racing · BCR-I-31
BC Racing Coilovers - BMW 3 Series (True Rear Coilover) (98-06) [E46]
Rear-wheel-drive 3 Series
BC Racing · BCR-I-64
BC Racing Coilovers - BMW 3 Series (True Rear Coilovers) (00-06) [E46 (M3)]
E46 M3
All E46 kit links and part numbers
- BC Racing · BCR-I-02: BC Racing Coilovers - BMW 3 Series Sedan/Coupe (98-06) [E46]
- BC Racing · BCR-I-14: BC Racing Coilovers - BMW 3 Series Coupe (00-06) [E46 (M3)]
- BC Racing · BCR-I-31: BC Racing Coilovers - BMW 3 Series (True Rear Coilover) (98-06) [E46]
- BC Racing · BCR-I-64: BC Racing Coilovers - BMW 3 Series (True Rear Coilovers) (00-06) [E46 (M3)]
- BC Racing · BCR-I-90: BC Racing Coilovers - BMW 3 Sedan Convertible (RWD) (98-06) [E46]
- BC Racing · BCR-I-121: BC Racing Coilovers - BMW 3 Sedan Convertible (RWD) (00-06) [E46 (M3)]
- AST · ACS-B1103SD: AST 5100 Street Coilovers for BMW M3 E46 - ACS-B1103SD
- AST · ACU-B1103SD: AST 5100 Street Coilovers for BMW M3 E46 - ACU-B1103SD
- AST · ACT-B1103SD: AST 5100 Street Performance Coilovers for BMW M3 E46 - ACT-B1103SD
- AST · ACC-B1107SD: AST 5100 Clubracing Coilovers for BMW M3 E46 - ACC-B1107SD
- AST · RIV-B1103SD: AST 5200 2-Way Motorsport Coilovers for BMW M3 E46 - RIV-B1103SD
- AST · RAC-B1103SD: AST 5300 3-Way Motorsport Coilovers for BMW M3 E46 - RAC-B1103SD
- MOTON · M 505 174SD: MOTON 1-Way Clubracer Coilovers for BMW 3 Series E46 and M3 - M 505 174SD
- MOTON · M 505 031SD: MOTON 2-Way Motorsport Coilovers for BMW 3 Series E46 and M3 - M 505 031SD
- MOTON · M 505 154SD: MOTON 3-Way Motorsport Coilovers for BMW 3 Series E46 and M3 - M 505 154SD
- AST · ACC-B1104SD: AST 5100 Clubracing Coilovers for BMW 325xi / 330xi E46 - ACC-B1104SD
- AST · ACC-B1106SD: AST 5100 Clubracing Coilovers for BMW E46 / E85 / E86 - ACC-B1106SD
- AST · ACS-B1101SD: AST 5100 Street Coilovers for BMW E46 / E85 / E86 - ACS-B1101SD
- AST · ACT-B1101SD: AST 5100 Street Performance Coilovers for BMW E46 / E85 / E86 - ACT-B1101SD
- AST · ACU-B1101SD: AST 5100 Street Coilovers for BMW E46 / E85 / E86 - ACU-B1101SD
- AST · ACU-B1102SD: AST 5100 Street Coilovers for BMW 325xi / 330xi E46 - ACU-B1102SD
- AST · RAC-B1101SD: AST 5300 3-Way Motorsport Coilovers for BMW E46 / E85 / E86 - RAC-B1101SD
- AST · RIV-B1101SD: AST 5200 2-Way Motorsport Coilovers for BMW E46 / E85 / E86 - RIV-B1101SD
- MOTON · M 505 030SD: MOTON 2-Way Motorsport Coilovers for BMW E46 Applications - M 505 030SD
- MOTON · M 505 141SD: MOTON 3-Way Motorsport Coilovers for BMW E46 Applications - M 505 141SD
- Eibach · PSS65-20-001-01-22: Eibach Pro-Street S Coilover Kit for BMW applications - PSS65-20-001-01-22
- Eibach · PSS65-20-001-02-22: Eibach Pro-Street S Coilover Kit for BMW applications - PSS65-20-001-02-22
- Eibach · PSS65-20-001-03-22: Eibach Pro-Street S Coilover Kit for BMW applications - PSS65-20-001-03-22
Before you order.
- Have the engine, body style and model year ready, including M3, xi or Compact where relevant.
- Match the application table and axle-load limits, and identify which mounts the kit supplies or reuses.
- Confirm whether the rear spring stays separate from the damper or moves onto it.
- Tell us about the wheels, tyres and suspension changes already on the car.
- Budget for fitting and alignment. Confirm the current lead time before booking the work.
See what the adjustments do.
Choosing coilovers for road and track
Compare the kit against your roads, tyres and setup plans before counting adjusters.
Ride height and spring preload
Understand the two adjustments before choosing a lowering range.
What spring rate tells you
Compare force and movement, read the units and choose a spring with the damper in mind.
Spring rates and top mounts
Read the front/rear figures and check which mounts come with your kit.
Questions about BMW E46 coilovers.
Check the details before choosing your kit.
What are the best coilovers for a BMW E46?
For a road or mixed-use E46, we'd start by comparing BC Racing BR, Eibach Pro-Street S and AST 5100 Street. The useful differences are the damping adjustment, supplied mounts and rear layout. For a developed track car, compare the separate controls on AST 5200/5300 and MOTON kits. Match the exact application before comparing price.
Do E46 M3 and standard 3 Series coilovers use the same kit?
Many have separate part numbers. BC Racing's BCR-I-14 is an M3 coupe listing, while BCR-I-02 is the regular sedan/coupe application. AST and Eibach also have dedicated M3 listings. Some MOTON tables include both regular E46 engines and M3; use that shared coverage only for the specific kit whose table lists them.
Which coilovers are listed for the E46 325xi or 330xi?
We list AST ACU-B1102SD Street and ACC-B1104SD Clubracing kits for the 325xi and 330xi. The Street kit retains a separate rear spring and damper; the Clubracing kit has front and rear coilovers. Both list 12-position rebound adjustment. Check the complete application and mounting specification on the product page.
Does an E46 coilover kit always have a true rear coilover?
No. A kit can retain the original separate rear spring and damper, using an adjustable spring seat to set the height. A true rear coilover puts the spring around the rear damper and changes where the spring load enters the body. Confirm the intended rear layout and mounting requirements with the installer.
How much should I lower my E46?
Work within the exact kit's adjustment range and leave enough travel for the surfaces you drive on. The fitter should check wheel and tyre clearance through steering and suspension movement, then set the alignment at the finished height. There is no useful universal drop figure for every E46 body, wheel and tyre combination.
Which spring rates should I choose for my E46?
Use the standard kit specification as the starting point. For example, BCR-I-02 lists an 8 kg/mm rear spring and the true-rear BCR-I-31 lists 5 kg/mm, but their different spring positions prevent a direct comparison of stiffness at the wheel. For custom rates, give the supplier the exact kit, car weight, tyres and intended use so the spring and damper specification can be considered together.
Sources & specifications.
- BMW Group: 50 years of the 3 SeriesE46 generation and model history
- BMW Group Classic: E46 model historyBody styles, xi and production context
- BMW M: the E46 M3M3 production period and model identity
- BC Racing UK: configuration and setup FAQsSpring-rate and custom-configuration guidance
- Intrax: E46 track-day setupSupporting suspension, alignment and track-use context
- Eibach: Pro-Street S rangeHeight-adjustable range design
- BC Racing BCR-I-02 specificationsExact listed application, adjustment or spring specification
- BC Racing BCR-I-31 specificationsExact listed application, adjustment or spring specification
- AST ACU-B1102SD specificationsExact listed application, adjustment or spring specification
- AST ACC-B1104SD specificationsExact listed application, adjustment or spring specification
- Eibach PSS65-20-001-01-22 specificationsExact listed application, adjustment or spring specification
- Eibach PSS65-20-001-02-22 specificationsExact listed application, adjustment or spring specification
Talk about your E46.
Send us your model year and engine, the way you use the car and any kit codes you're considering. Include the wheel and tyre details if clearance is part of the question. Cameron and Garreth can help narrow the options and check the application with you.
Ask about my car0115 647 9207