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Our Specialty

Audi · BMW · Mercedes · VW · Porsche · Mini · Volvo.

Factory diagnostics. OE-equivalent parts. Thirty-eight years on these platforms. We know your car.

European auto repair is a different trade from American or Japanese auto repair. The cars are engineered to tighter tolerances, with more onboard electronics, more sensors, more network-bus communication, and more manufacturer-specific parts. The dealer's diagnostic equipment costs $24,000 per make. The shop down the street, the one that does "everything," doesn't have it — they can't read the fault codes specific to your B8.5 platform Audi, so they swap parts until something works. We're not them.

Westside runs factory diagnostic software for every European make we service: VAG-COM (VCDS) for VW and Audi, BMW ISTA, Mercedes XENTRY, Porsche PIWIS, Volvo VIDA. The software subscriptions cost us roughly $8,000 a year combined. The hardware — laptops, OBD-II interface modules, network analyzers — runs another $30,000 across the bays. Our techs sit through Bosch and ZF training every year. Diego went through the Audi Academy in 2014; Tony went through the BMW STEP Master program in 2019. We invest in the equipment and the training because there is no other way to service these cars properly.

OE-equivalent parts sourcing is the other half of the equation. The dealer charges retail markup on parts that come from supplier factories the dealer does not own. The same Brembo rotor that costs $284 from the Audi parts counter costs $172 from Brembo's commercial supplier under the supplier's own branding — identical part, identical specification, often the same casting from the same line. We default to OE-equivalent unless the customer prefers OE-original. The savings on parts alone typically run 30–40% over the dealer.

Why does it matter? Because a transmission flush on a ZF-8HP-equipped BMW or Audi is procedurally different from a transmission flush on a 4L60E-equipped Chevy Tahoe. The fluid is different. The fill procedure is different (the ZF 8HP has no dipstick; the level is set by temperature method, with the car running, with a specific cooler-line connection). A shop that doesn't know the procedure will overfill or underfill. Either ruins the transmission within 10,000 miles. We know the procedure. The chain shop, statistically, does not.

Audi

Q5, Q7, A4, A6, A8, S/RS variants. We work on B8, B8.5, B9 platforms daily. Carbon-buildup walnut-blasting on FSI/TFSI engines is a job we've done hundreds of times — the Audi 3.2 V6 problem, the 2.0T 06-09 oil-consumption issue, the EA888 Gen 1/2/3 timing-chain tensioner job.

VAG-COM coding for retrofits, parking-aid recoding, and adaptive cruise-control calibration. ABS module replacement and coding. Quattro driveline diagnostics. Bring us your Q7 with the air-suspension fault before you accept the dealer's $4,800 quote — there's a 70% chance it's a $480 reservoir bottle that the dealer is upselling into a strut replacement.

BMW

F-chassis (F30/F31/F32/F36 3-series and 4-series, F10/F11 5-series, F15/F16 X-series), G-chassis (G20/G21/G30). Vanos rebuilds — both single and double. N54/N55 turbo work, the HPFP recalls, charge-pipe replacement, oil-filter housing gasket (the famous N54/N55 leak that the dealer calls "needs a new engine" and we fix in three hours).

VANOS solenoid replacement on E-chassis cars. ISTA coding for retrofits. Manual transmission clutch on the M cars. We're the closest thing to a Munich Werkstatt in west Denver — Tony Rivera has been doing BMW work since 2007, holds the BMW STEP Master designation, and drives a 2019 M2 Competition. If you ask him about a Vanos rattle he can tell you which side it's coming from before you finish describing it.

Mercedes-Benz

C-class, E-class, S-class, GLE, GLC, Sprinter (we do Sprinter chassis work for two local landscaping fleets). Air-suspension repair is the headline service — the W221 air-spring jobs that the dealer quotes at $4,200 we do for $1,900 using Arnott or OE-equivalent springs.

XENTRY diagnostics. SBC (Sensotronic Brake Control) pump replacement on the older W211. SAM module work. Sprinter chassis service — oil, fuel filters, EGR cooler replacement, particulate-filter regeneration faults. We are the only shop on the west side that does competent Sprinter work; the dealer schedules out 6 weeks for it, we schedule out 4 days.

Volkswagen

GTI, Golf R, Jetta, Passat, Tiguan, Atlas, Touareg. The cars Karl built his shop on. EA888 timing-chain tensioner replacement is a job we've done so many times Diego can do it in his sleep. DSG transmission service on the 6-speed DQ250 and 7-speed DQ200/DQ500. Carbon-cleaning on FSI/TFSI engines.

VW is where Westside started, and it remains the most-serviced make on our bay schedule. Every VW owner in Denver has eventually had a tensioner issue, an oil-pump chain stretch, or a carbon-buildup misfire — we are the shop they get sent to when their friend says "no, do not go to the dealer for this."

Porsche

911 (996, 997, 991, 992 generations), Cayenne, Macan, Panamera, Boxster, Cayman. We do major service on both air-cooled and water-cooled platforms. The IMS bearing on M96/M97 engines is a job we've done dozens of times — typically the LN Engineering ceramic bearing upgrade, done concurrently with the rear main seal and clutch on manual cars.

PIWIS diagnostics on most cars. For 992-generation jobs that require current PIWIS subscription-only coding (some safety-system calibrations, some adaptive-suspension recalibration) we send out to a Porsche-only shop on Federal Boulevard. Everything else, including major engine work on 997 and 991, we do in-house.

Mini

Hardtop, Countryman, Clubman. R56-generation timing-chain replacement is the famous Mini job — and it's a $2,800 quote at the BMW dealer. We do it for $1,400 with OE-equivalent parts. N18 and N20 work on the later cars. We have seen every variant of the Mini chain-stretch fault and we do not need to research the procedure on YouTube before we start.

JCW work, including high-output recalibration on F-series cars when customers bring us tunes. Generally Westside is conservative about tuning — we'll install your aftermarket parts but we'll be honest with you about the warranty implications.

Volvo

XC60, XC90, V60, S60. T5 and T6 Drive-E platforms — both the four-cylinder turbo and the four-cylinder twin-charged variants. CEM module work. Air-suspension XC90 jobs (Volvo's air-spring system has a 50% failure rate by 90,000 miles; we do the conversion to coil if the customer prefers, or we do the OE air-spring replacement).

Volvo VIDA diagnostics. Drive-E platform timing-belt service. The big-twin-engine T6 work on the later XC90s. Volvo is the smallest segment of our practice but we are competent and our parts pricing on Volvo is some of the best in the metro.

Factory diagnostic equipment for every make.

The diagnostic software subscriptions cost us roughly $8,000 a year. The hardware adds another $30,000. We make the investment because there is no other way to service these cars properly.

The dealer's job is to sell you a new car. Our job is to keep yours running for another hundred thousand miles.

Frequently asked questions

Do you do warranty work?

Westside is not an authorized warranty repair shop for any manufacturer — we are an independent shop. However, if you have an aftermarket warranty (CarShield, Endurance, Toco, etc), we work with all of them. We bill the warranty company directly, you pay your deductible, and we handle the documentation. We've done hundreds of these claims; we know the paperwork.

Will using your shop void my factory warranty?

No. The federal Magnuson-Moss Warranty Act protects you from a dealer voiding your factory warranty because you used an independent shop. We use OE-equivalent parts and document every service in writing. The only exception is if the dealer can prove the independent shop caused the failure — which has not happened to a Westside customer in 38 years. If your dealer's service writer hints otherwise, ask them to put it in writing. They will not.

Do you have loaner cars?

We have two loaner vehicles available to customers on appointments expected to run longer than a half-day. Lisa books them when she books the appointment — there are usually slots within 5-10 days. No per-day charge — you bring the loaner back with the gas at the level you took it out at.

Do you provide written estimates before doing work?

Yes — always. Every customer gets a written estimate before any work begins. We do not proceed without your authorization. If we find additional issues during the work, we stop, call you, walk you through the finding (Lisa sends photos), and get authorization before continuing. You will never receive a surprise bill at Westside.

Can you order parts I'm having shipped?

Yes. If you've ordered from FCP Euro, ECS Tuning, Pelican Parts, or other enthusiast suppliers and want us to install them, bring them in. We charge labor only. Some warranty arrangements apply only to parts we sourced — we'll explain it at the front counter so you know which parts are on us and which are on you.

Do you work on classic / air-cooled VWs and Porsches?

Yes, on a case-by-case basis. Karl Brennan started his career on air-cooled VWs and air-cooled Porsche 911 (pre-996). Mark and Diego have both worked on the classics. We're not the cheapest shop in town for a 1973 Bus restoration, but we are competent and the work is done correctly. Call us before you bring it in — we want to scope the job before we book the bay time.

Schedule Service

Schedule your European-car service.

Online booking with same-day or next-day slots. Or call Lisa — (303) 555-0187.

Schedule Service → Call (303) 555-0187