• Engine Oil and Filter Change

    We use nothing but the best when it comes to engine oil and oil filters. You will either find Mann or Mahle (both original equipment manufacturers – OEM) filters here at Turner when it comes to oil filters. When it comes to lubrication, you’ll find a couple different options that vary depending on the engine in your BMW; Castrol 10w60, BMW Twin Power 5w30, Motul 8100 5w40 and multiple Redline oils in different viscosities.

    At Turner BMW we recommend, for most vehicles, changing engine oil and filter every 6,000 miles or 12 months. We understand that BMW, as well as your BMW dealer, have told you that you can go as much as 15,000 miles, but at Turner BMW we’re a little old school. You’ll read in your BMW owners manual that your engine may consume up to 1 liter of fluid every 1,000 miles. If this is the case and you drive 15,000 miles before your next oil change, you’ll run out of oil in roughly 6,000-7,000 miles (depending on your engine). Also, BMW uses a paper oil filter. Over time that filter has the potential of breaking down and little pieces of that filter could potentially get sucked through your engine which could do harm.

    Again, we’re always putting our customers best interests first and using high quality parts is definitely on the top of our list.

  • High Speed Wheel/Tire Balance:

    Sometimes one of the most overlooked services for your BMW can be rotating and balancing the tires. The tires mounted to your BMW are what provide feedback between you and the road.

    Keeping these tires in tip top shape will do multiple things;
    1) give your BMW a better/smoother ride
    2) give the tires a chance to wear evenly, preventing pre-mature tire wear and costly tire replacements
    3) help prevent tire vibration due to “cupping” and/or uneven wear

    At Turner BMW we recommend balancing your tires every 6,000-7,000 miles. If your BMW comes with the same size tires on all 4 corners (normally referred to as “square”), we’d recommend rotating the tires at the same time (every 6,000-7,000 miles). If your BMW comes with different size front and rear tires (normally referred to as “staggered”), you will be unable to rotate the wheels/tires, but balancing becomes even more important in preventing uneven wear and/or vibrations.

  • Wheel Alignment:

    At Turner BMW we use state of the art equipment including our Hunter Hawk-Eye alignment rack. Keeping your BMW aligned is incredibly important in preventing pre-mature tire wear and costly tire replacement bills. Even if your BMW isn’t “pulling” to the left or the right, it doesn’t mean that your car is aligned properly.

    There are multiple adjustments (camber, caster and toe) that can be made during a 4 wheel alignment that help provide you with the ultimate driving experience, for your ultimate driving machine, as well as get the best wear for your tires. Each BMW comes from the factory with a different amount of adjustments (some of the newer cars don’t have a factory camber adjustment). If any of these adjustments are out of BMW spec it could make your car drive funny, wear the inside edge of your tire(s), wear the outside edge of your tire(s), make the vehicle pull to the left or the right, make the car uneasy at high speeds, make the car hard to turn, prematurely wear some (or all) of your tires and many other things.

    At Turner BMW we recommend getting at least 1 alignment every 10,000 miles or 12 months. If you have a track driven vehicle or a race car, you might do as many as 3-4 alignments during the “season” for a variety of reasons. Ultimately, it’s important to maintain your BMW’s tire maintenance….especially in New England given the HUGE potholes that we have.

  • Engine Tune-Up:

    Maintaining your BMW is of the utmost importance especially if you plan on keeping the car for several years. While BMW has engineered some of the best engines in the history of the automobile, it doesn’t mean that they don’t have their own special quirks.

    At Turner BMW when we think of engine tune-up, we think about replacing items such as spark plugs, ignition coils, engine air filter(s), cabin air filter(s), fuel filters, transmission fluid service, differential fluid service, transfer case fluid service (where applicable), coolant flushes, brake fluid flushes, etc.

    Depending on your BMW model and engine will determine how often some of the above mentioned items need to be replaced. To give a broad estimate on when customers should expect to replace some of these maintenance type items see below:

    - engine air filters and cabin air filters every 30,000-45,000 miles
    - spark plugs every 30,000-45,000 miles ***depending on engine – M cars and direct injection engines are typically more frequent***
    - fuel filter every 30,000-45,000 miles
    - transmission fluid, transfer case fluid and differential fluid every 80,000-100,000 miles
    - coolant every 30,000-45,000 miles
    - brake fluid every 12-24 months ***brake fluid is very hydroscopic, so more frequent changes are a good idea***
    - power steering fluid every 30,000-45,000 miles

    Again, the goal is to stay ahead of maintaining your BMW to give you the best ownership experience that we can. A well maintained car is typically less expensive than an unmaintained car in the long run.

  • Walnut blasting (carbon cleaning)

    BMW introduced the twin turbocharged N54 direct injection engine in 2007. The N54 engine was later followed by the single turbo N55 direct injection engine and the single turbo 4 cylinder N20 direct injection engine. All of these engines have been staples in the BMW model line-up and have some of the best technology engineered in automobile engines.

    One of the downfalls of direct injection though, is that the intake ports typically see a fair amount of carbon build up. This carbon build up prevents the engine from breathing to its full potential costing the owner performance, fuel economy, idling issues, potential check engine lights and more.

    In order to safely decontaminate the carbon, the intake manifold gets removed and the intake tract of the cylinder head is cleaned. At Turner BMW this is typically done with a cleaning solvent and brush to remove the larger carbon particles and then we use a special tool that blasts walnut shells against the intake valves. Once this process is completed, owners typically notice an immediate improvement in how the car starts, idles and drives. A good before and after photo (see below) will show you the severity of carbon build up on a vehicle with a little more than 60,000 miles. So, if your direct injection engine BMW doesn’t feel “like it used to” or feels a little sluggish, there is a good likelihood that the car isn’t operating at its full potential due to carbon build up.

    At Turner BMW we recommend performing this service every 40,000-50,000 miles. As most preventative maintenance items though, this will depend on how the car is used as well as if the car has any performance upgrades (cold air intake, performance software, oil catch can, etc).

  • Valve adjustment

    If you’re at all familiar with older cars then you understand what’s involved with adjusting valves. Some might question the importance of adjusting them though. Why do they need adjustment? If my motor isn’t “ticking” or noisy, then it must be fine, right? Not necessarily. Noise isn’t the only sign that your valves need adjustment. It’s certain A sign, but not the tell all. The importance of adjusting valves is that you want a motor that is running efficiently, providing you with the most performance and best fuel economy that your engine was designed for (or maybe more). When valves are out of their spec, neither of these are possible due to valves either being opened too much or not enough. This can also cause the edge of the valves to burn which means they are not sealing properly and can ultimately lead to replacement of a valve(s).

    At Turner BMW we have the right tools required to adjust valves in all the BMW motors that require it; M20, M30, S14, S38 and S54. Depending on what motor you have in your BMW, will depend on how often it is recommended to adjust the valves. For a quick reference, see below:

    M20 – 15,000 miles
    M30 – 15,000 miles
    S14 – 15,000 miles
    S38 – 20,000 miles
    S54 – 25,000 miles
    ***the above recommended mileage is based on what we have found to be “good practice” and is NOT the manufacturers recommended mileage. This mileage is also heavily dependent on how the vehicle is driven (daily driver, weekend cruiser, track day toy, race car, etc).

  • BMW Inspection Services

    Some people are more familiar with what BMW might refer to as “Inspection 1” and “Inspection 2” services. At your local BMW dealer you may have a service advisor recommend certain service(s) at particular mileage intervals. He/She may refer to these as Inspection 1 or Inspection 2. What these “Inspection” services typically include are things like changing the engine oil and filter, replacing your BMW’s cabin air filter, replacing the engine air filter, replacing the fuel filter, replacing the transmission fluid and differential fluids, replacing the brake fluid, flushing the coolant and replacing the engines spark plugs.

    At Turner BMW we’re happy to continue the kind of service that you are accustom to or if you’re not happy with the service that your dealer has provided, we can talk about what would work best for you and your BMW. Sometimes it might be easier to have more of an “a la carte” maintenance schedule. This means we can advise you, based on your vehicles service history and your driving habits, what items (filters, fluids, spark plugs, etc) should be replaced and at what time. Dealerships are more apt to advise of a service based on their wants and needs, not necessarily your vehicles wants and needs.

    If you have any questions regarding what you need for your BMW, give us a call at 978.388.9595 or email [email protected]

  • Rod Bearing replacement

    With high horsepower typically comes high maintenance. With the E46 M3, Z3 M Roaster, Z3 M Coupe, E9x M3, E60 M5 and E63 M6 this usually means customers are replacing parts that you might not replace on the non-M variant. One of the common parts that are replaced on the above mentioned M models that typically don’t need to be replaced on the non-M models are connecting rod bearings. When BMW designed and engineered these engines (S54, S65 and S85), the oil clearances on the connecting rod bearings were too tight meaning there was not enough lubrication between the crankshaft and bearing creating more heat and premature wear. So, what’s “the fix”?

    At Turner BMW we’ve found that replacing the stock OE BMW rod bearings with a better bearing, should give customers added protection in these specific M engines. For the S54 engine found in the E46 M3, Z3/Z4 M Roadster and Z3/Z4 M Coupe we replace the standard OE BMW bearings with a WPC treated bearing. These bearings are shot-peened which adds clearance allowing for more oil flow between the crank and bearing. For the S65 engine found in the E9x M3 and the S85 found in the E60 M5/E63 M6, we use a BE Bearing. BE Bearings are a bearing manufacturer that redesigned the factory BMW bearing. They allow for more oil clearance and use a traditional lead-copper design which wears less on crankshaft journals as well as the bearing material being traceable through oil analysis. Both the WPC treated bearings and the BE Bearings were designed for use with the 10w60 oil that BMW recommends as well.

    When should I consider replacing the rod bearings on my car? At Turner BMW we recommend replacing the rod bearings around 60,000 miles. Like many other items, this is heavily dependent on how the car is driven. If your car is used on track, we recommend replacing the bearings in as few as 30,000-40,000 miles…..or maybe even less. Contact us with any questions and/or concerns.

  • Chassis/Rear Subframe Reinforcement

    The E46 rear driveline and suspension are very similar to that of the E36. An unfortunate side effect of this is that the E46 also shares some of the same problems as the E36. One of these problems is the rear mounting points for the subframe, which can rip out from their spots in the sheet metal. This happens because the rear differential transmits the torsional load from the engine through the subframe, then into the chassis. This constant loading and unloading weakens the sheet metal and causes it to fatigue and separate from the chassis. BMW tried to fix this problem in the E46 by placing a cross member on the front two mounting points of the subframe. This cross member keeps the front mounting points from having problems by placing the bushing and the stud in double-sheer, thus reducing the twisting action on the sheet metal. The unfortunate side effect of this is that the load from the front of the subframe now gets transmitted to the left rear of the subframe. This is where we have seen many failures of the chassis on low mileage street cars and race cars. BMW has also tried to prevent the issue by injecting foam into the open space between the underside of the chassis and the top of the trunk. This seems to work but that does not address the issues of the spot welds failing on the sheetmetal. It can also make any additional work there harder and almost impossible to weld against.

    At Turner BMW we developed a reinforcement kit in the early 2000’s as our race team was campaigning the E46 chassis in World Challenge. The reinforcement kit contains 8 thick pieces of steel that are welded to the rear subframe mounting points. These additional pieces of steel help spread the force mentioned above over a greater surface area of thicker “floor” material. Once installed, we’ve seen chassis’s last over 100,000 miles of track abuse.

    If you’re concerned about the condition of your rear floor, give us a call and schedule a time to have our BMW techs check it out.

  • Suspension Tuning:

    A cars suspension, among other things, is what links the driver to the road. BMW is known for designing vehicles that mix superior comfort with dynamic stability providing customers with “The Ultimate Driving Machine”.

    At Turner BMW we have all the necessary tools, skills and parts to help keep your BMW driving like the day it was new……or better. From manufacturers such as Bilstein, H&R, KW/ST, Motion Control, Sachs, Meyle, Lemforder and more, we can install the best parts based on our experience as well as from our customers feedback. Whether your car is a daily driven 3 series, 5 series, 7 series, etc or a track prepared BMW, we’ll have an idea on what it is that you’re looking for and the right parts to give you what you need.

    For daily driven street cars, we typically recommend OEM replacement parts. These parts typically provide the least NVH (noise, vibration, harshness) while maintaining that German quality that BMW is known for. While some customers are looking for a little more performance from their street car, we can certainly install components other than the OEM parts, but for the majority of the street cars that we work on, this would be our recommendation.

    For street cars that see occasional track use, we may recommend some stiffer suspension parts which help stabilize the car on track better as well as provide more feedback to the driver. The items may be stiffer dampers, lowering springs, stiffer durometer bushings or solid bushings, larger anti roll bars or coilovers. Again, these items will help provide the driver with more feedback and less suspension deflection. While installing stiffer components might lead to more NVH, the trade-off for these customers will be well worth it.

    For pure track only/race cars, we will recommend solid components and the best suspension parts available for the chassis. While this depends on the class that the customer is building the car for, there are a lot of different options that we have. From solid drivetrain mounts, multi way adjustable coilovers, adjustable sway bars and links to solid bushings and adjustable control arms. When it comes to building a track car customers typically aren’t concerned with NVH and are trying to find every tenth of a second at their favorite track.

    No matter what you’re looking for, give us a call or shoot us an email and we’ll help find the right set up for you!

  • Corner Balance

    Whether you’re using your BMW on the street as a daily driver or weekend ride, or you’re setting the car up for the track, corner balancing your BMW can drastically change how the car responds to the drivers input.

    As many people have probably heard, manufacturers go to extraordinary efforts to give their “sports cars” a 50/50 weight distribution. Why? Well a car that is well balanced from front to back will handle better than the car that is extremely nose heavy or tail heavy. BMW has been a manufacturer that has taken balance (from the factory) to the heart making sure they provide customers with “the ultimate driving machine”.

    At Turner BMW we have the tools and knowledge to take vehicle balance to the next level with corner balancing the car. The only item that is needed prior to having the car corner balanced is a decent set of ride height adjustable coilovers. Our factory trained BMW technicians will dial in the customers preferred ride height, lower it down onto our scales and then using the coilovers ride height adjustment, will balance the cross weight of the vehicle to the ideal 50% balance. This is a somewhat tedious process as every little turn on the coilovers adjustment collars will change the amount of weight that gets transferred to different corners of the vehicle…..hence corner balancing the car.

    In the end, you’ll drive away with a vehicle that is probably balanced beyond the ideal manufacturers 50/50 weight distribution. Again, for guys that are driving their BMW on the street, it’ll provide a more balanced chassis and for those that are driving their BMW on the race track, it’ll provide a more predictable/well balanced car.

  • Pre-Purchase Inspection

    Are you considering the purchase of a pre-owned/used BMW, but want to make sure that you’re not diving into a can of worms?

    At Turner BMW we offer customers the ability to have a factory trained BMW technician look over a vehicle that they are interested in for only $100. That $100 could potentially save you thousands ($$$) of dollars in unforeseen repairs. Our technicians will give your potential “new to you” BMW a thorough look over and use their wealth of knowledge to check all the common concerns that we see on a daily basis.

    We’ve done hundreds of pre-purchase inspections over the years and have seen BMW’s that look great from the outside, but once thoroughly looked over by a professional, that technician has painted a little different picture than what’s just on the outside. A simple pre-purchase inspection can generally be done in 1-1.5hrs and our technicians will check for damaged suspension components, worn suspension components, worn engine components, check engine light faults, body work/paint work, damaged/bent wheels, engine oil leaks, proper installation of aftermarket performance parts, common failures on specific chassis’s (rear floor/chassis cracks on E46 models) and more.

    So, do yourself a favor and let Turner BMW checkout your next BMW before potentially diving into a can of worms.

  • Race car/Track car/HPDE preparation

    If you’ve heard the name Turner Motorsport before, then you’re likely familiar with what we do. Will Turner started Turner Motorsport back in 1993 out of the trunk of his E30…..selling brake pads at the race track, so he could continue to pursue his dream of driving on a race track. Fast forward to 2017 and that dream has been more than realized with over 300 professional races and 7 championships.

    What this adds up to is that Turner BMW has the skill, knowledge and experience to help you with your BMW. Whether this is a car that is raced at the amateur level, professional level or a car that is used for BMWCCA driver schools (or similar), we have the ability to help with that car. From building roll bars and roll cages, performing engine swaps, installing custom suspension, installing race seats and harnesses, installing aero, installing fire suppression systems, corner balancing, custom alignment and more, our technicians are up for the challenge.

    At Turner BMW you can bring your car to us as a bone stock car looking to be built to a full-on track machine or you can bring your already full-on track machine to us for routine service/check-ups.

    You can find our service manager, shop foreman and other employees at the track throughout the summer months. You’ll also find numerous Turner BMW maintained race/track cars throughout the country. Like everything Will has done in the past, he demands perfection of our team meaning you can be sure that no corners are cut and we’re treating your car like it’s one of ours.

  • Track Inspections

    As many clubs require now a days, Turner Motorsport can sign off on your track inspection. Whether it be for a BMWCCA, PCA, COMSCC, SCDA or other club, our techs are capable of checking over your car to ensure that your safety comes first when driving on the race track.

    At Turner BMW our technicians will check suspension components for wear, tires for wear, wheels for cracks, engine for oil leaks, cooling system for coolant/water leaks, brake fluid for water contamination and more. These are only some of the items that we’re looking over, but our factory trained BMW technicians will look over the specific clubs tech inspection sheet to ensure your vehicle will pass tech once at the track. No one wants to spend several hundred dollars only to not pass tech inspection.

    Give us a call and we’ll get your car on the schedule. This service typically only takes 1hr.

The Ultimate in Maintenance, Repair and Performance for your BMW

Why Turner?

BMW Experts

Turner has been servicing , repairing and adding performance to BMW exclusively since 1993. We are known worldwide as BMW experts.

Personalized Service

We are your one stop shop for all your BMWs needs. We exclusively work on BMW’s - and can handle it all. We will treat your BMW like it’s our own.

Knowledgeable Staff

We eat , sleep and drink BMWs (well …just about) We have over 100 Years of combined BMW experience which we use to service, repair or add performance to your BMW correctly and efficiently – the first time !

Boston Area BMW Experts

Turner has been servicing the Boston area BMW community since 1995 , But it doesn’t stop there – Turner is known all over the world as BMW experts . In fact - we get cars shipped to us from all over North America


Just because we are experts does not mean we are expensive. Our huge parts purchasing volume allows us to be price competitive. We are typically at least 20% less expensive than your local dealership.


We have been racing BMW’s professionally since 1998 – and have won 7 Championships. Imagine if we can do that , how efficiently we can service, repair or add performance to your BMW !

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